Okay, so now we're gonna go to a another very professional level color crater and that's called curves so in levels we had three different adjustments we could make we're adjusting the level of brightness or lightness in our shadows it's one our mid tones and our highlights with curves you can adjust sixteen different or you could have sixteen different adjustments in the curves adjustment compared to the three you get in levels ok, so it is a way for you to be more precise with your adjustments so we're gonna go ahead and close this image and we're gonna open up one from portugal the vast code obama monument in lisbon so here's our before and here's our after so we're gonna take a look at how to use the curves adjustment and I'm just giving you a whole bunch of options today for correcting the color and lighting in your images s so you have all kinds of different tools to choose from to see which one resonates with you the best and so that you have many different tricks up your sleeve...
if you will because one of these methods is going to be better on an image that another one and you're you're kind of going to have to assess that on an image by image basis ok, so we're gonna go ahead and turn off the visibility of the curves adjustment layer that I've already created for you on and we're going to create one from scratch, actually gonna go him to lead that. Ok, so here we are, let's say we have just opened this image up off our digital camera, and we need to do some a color and lining adjustments so curves is available as an adjustment layer, so we don't have to worry about making a smart object, so we're going to go ahead and go down to that half black, half white circle with the bottom of the layers panel to open up your adjustment layer menu again, you can also get to that many from the layer menu, new adjustment layer, same thing, so we'll go ahead. Choose curves from here soon as you do that for other stops going to ask you what you would like to name it will let the stay named curbs one, and immediately on the right hand side of your screen. If you're running, see us foresee us five, you're going to see uh ah, hissed a gram with a grid on top of it with a diagonal line. If you're in cs three year earlier, this is going to open in a dialogue box, so let me zoom in a little bit and let's talk about what we're seeing here, so curves has been notoriously scary, because, first of all, where's the curve. Why is it called curves good question so what we're looking at here is way see a history graham so this is the same history mu had seen a levels adjustment okay and you've even got the same shadow slider down here is the bottom left and a highlight slider at the bottom right? Hey, those worked just like they work in levels so the first thing you can do in the curves adjustment layer is if you have a gap on either side of your history graham you can go ahead and drag these sliders in and as I do you will see that dagan the line move that diagonal line is the curve even though it's not yet curved that diagonal line is a way for you to take your original levels of brightness for your lightness values in your image and adjust them okay to more fully spread out the information in your history um casey you've got all kinds of wonderful levels of brightness going on in your image the gray scale slider at the bottom tells you your original brightness levels okay just like it did in the levels of just is it the grayscale slider on the left side shows you the new brightness level when you create an adjustment now curves used to be incredibly difficult to use in the big confusion lies in okay well well lisa you said I can adjust sixteen points in this dialog box first of all, how the heck do, at a point? What do I do with the point once I've added it? And how does that affect my image? So all kinds of confusion with curves in cs four, we got a new little tool in the curves dialogue. This guy right here is a little hand with an arrow going up and down. This is what's called an on image adjustment tool or a targeted image adjustment tool. Basically, if you click it, you khun mouse over to your image and you can click on the part of the image that you want to be darker or lighter once you click on that point of your image and we're going to do all this when she click on the point of that image, you can drag upward with your mouse button toe. Lighten that level of brightness in your image. If you need to darken it, you click and drag down if you think about that motion, okay, if I'm dragging up toe, lighten and down to darken, what does that motion translate into in the real world? Is there anything in our physical world that is remotely similar to that? The answer is yes and it's a dimmer switch seriously, so if you think about how a dimmer switch works. You raise the little lever up to turn on the lights brighten brightened brightened brightened bright in the lights and you lower the little bar too dark and dark and dark in dark and dark and dark and darkened and just like a dimmer switch it doesn't take very much upper down motion to effect a change in your life right? Because that's why we have dimmer switches so that we can precisely control how light or how dark the lighting is in our room that is exactly how curves works that's exactly it so you can place up to sixteen dimmer switches along this line and you can lighten her dark and each one of them in a very, very subtle yet precise manner ok, now you've already got two points on this line okay, so we've got two dimmer switch is going on okay? You'll notice that when we moved to the shadow slider in we're just a little bit you can see I don't think I can zoom in anymore but you can see a tiny little hollow square at the bottom of that line okay that represents your shadows that's one dimmer switch there's one at the top which represents your highlights that's another dimmer switch so you've got to adjustment points that are already on this diagonal line which is the curve even though it is not yet curved which is also why this thing is so confusing now you can add more points dimmer switches to this line manually by clicking, but that was the big confusion with curves where the heck do you click to do what? Well, you gotta look at your history, graham you gotta look at this gray scale bar and you got to figure out what part of that line you want to click on to affect that level of brightness in your image. Well, that is extremely difficult to do so with this on in a minute on image adjustment tool that came along and see us for you can click on your image, click on the part of your image that you want to change and photo shop will put the point on the her for you ok, so it's a much more intuitive way to use this adjustment so that's, what we're going to look at, I'm gonna zoom into miami's just little bit use my space bar trick to move over and the first thing that I see that I need to do in this image is it looks overexposed to me. So I want to darken my shadows a little bit, so I'm going to go ahead and click the on image adjustment on and I'm gonna come over to an area in my image that I want to change and if I zoom in, you can see that my cursor has now become an eyedropper as soon as I I'm going to try to click on a really, really dark part. Okay, this part right here is pretty dark, so I'm gonna click and hold down my mouse button. I'm still holding down my mouse button now I get that little up and down arrow and just like a dimmer switch. What do you want to do? I want to darken those pixels because that was really more toward a very dark, dark charcoal gray in reality, when I shot this photo, so I'm gonna drag downward and as I do, photo shop is going to darken that brightness or lightness value in my image, wherever it occurs. Ok, so it's looking at the the lightness of brightness value of the pixel that I've clicked on it's finding that wherever it exists in the image, in, depending upon the direction I'm dragging upto, lighten down to darken that's what it's doing to those pixels in the overall image? So now I'll release my mouse button, and when I zoom back out, you'll see that now in our curves panel, we've actually got a curved line, so what is it telling us? Well, this was the point that further shop added for us because we clicked on our image if I drag a straight, if I imagine is a straight line down from that point to this gray scale bar. I can see that that's. What the original color of that area the image used to be. Ok, so that's, the original lightness value. If I draw a lift aligned to the left perfectly straight, I can now see what the new brightness or lightness value is for that pixel. So that's, what the grid is all about. The grid is just tow. Tow help! You see what's going on. Okay, so you gotta look at this grayscale bar to get your original value, and then you draw a straight line over to the left to see what the new lightness value of that pixel is. Now. I can see that it's darker. Then it used to be quite a bit. So another thing to remember with this grid that you're seeing here is this first column is dealing with shadows. Now that you understand what that history ram is telling me from our conversation on levels, that kind of makes sense because you know that into the history and deals with shadows, and that, you know, the black on the bar and the black and the slider is, you know, big red flags for you. Shadows middle two columns are dealing mostly with miffed owns this fourth column over here is dealing with your highlights, so knowing that information I could help you to place points adjustment point on the curve manually if you wanted to do that, but quite honestly, the on image adjustment tool is the way to roll with curves. Okay, so amusing back out that first adjustment I made that let's toggle the visibility often on on our curves adjustment layer so you can appreciate the difference so here's our before here's our after not half bad her so you saw me click on a dark part of the image and then physically dragged my mouse down to darken it ok, just like a dimmer switch, there's another way to do it. So this time I'm going to go find some light pixels that I want to make, even lighter and as I'm hovering on my image, notice what's happening on that curve there's a little clear circle that's, a pairing on the curve and that's showing me where that point is going to be added. So not only is the on image adjustment tolan easier with to use curves, it's also a great learning tool, because you can mouse around on your image and you can see it hop around on that curve, and if you pay attention to that, then you could start adding points manually, you know, if you wanted to, you so I'm gonna go ahead and click over here in the light part of that marble and I can see that on my curve I am indeed in the highlight portion of my grid over there so I'm gonna go ahead and click so initially click that as the point to the curve now this time I'm not going to use my mouth because when I'm doing a curves adjustment at home I use my arrow keys because it just like a dimmer switch doesn't take very much motion with that switch to effect a pretty big change in your lighting conditions the same thing is true with the curves a decimal point you don't have to move it very far to make a really big difference in your image so I just clit toe add the adjustment point on the curve and now you can see that inside that little area it's black now it's active okay I can use the arrow keys on my keyboard to nudge that adjusting the point up and see as I'm doing that I'm raising the dimmer switch I'm lightning and turning the lights on in those similar pixels of similar lightness values okay so I like using my arrow keys with this tool because really you just don't have to click your eric he's very far to make a big change and whereas when you're dragging up and down with the mouth you can't introduce too big of a change okay, so you can be a little bit more subtle with your curves adjustments by using the arrow keys on your keyboard. Ok, so let's now take a look at the before and after of this image and I was e mails you could see the whole thing so there's our before and there's are after pretty big impact. Okay, but that wasn't very hard, was it? That wasn't scary. That wasn't freaking anyway, that new on image adjustment toll is just wonderful and again that came along and see us for now another thing that you can do with curves is that if you want to add a little bit of contrast, remember how in the levels adjustment we use the mid tone slider in the middle of the history um and we could drag it to the right to introduce contrast or drag it to the left to introduce contrast well, you can do that here in curves to you do need to add this point manually unless you just know exactly where to click in your image to get right in the middle of this diagonal line because if you look at it, if this end is dealing with shadows in this end is dealing with highlights then right smack dab in the middle is mid tones okay, so what you khun dio tio increase mitt's home contrast is you can click in the middle, right in the middle of the grid and you can drag up to lighten or down to darken ok, so I'm going to take it back to the original point of where it wass zoom out so we can see what's happening on our image as we're dragging so I'm dragging down to darken, which is increasing contrast and I can drag up toe lighten which is deep crease in contrast, okay and that's a great way to use curves it really, really is I'm a drag that down this a little bit more so now we have a little bit of a curve to our diagonal line ok? And again, if I zoom in and look at what's happening with that curve, I can see ok here's the point I just added draw a straight line down imaginary you can see what that color used to be. Okay it's right smack dab fifty percent gray and now if I draw a line to the left to the grady and on the lift I can see what the new value of that is and it's a little bit darker than it used to be. Okay, so that's how this thing is working, you have a droppers and curves just like he didn't levels they were exactly the same way here's they did over there so you already know how to use them it's kind of an either or thing used the on an image adjustment tool or use the eye droppers I always use them on image adjustment tool and then I click smack dab in the middle of migrant and depending upon what I'm trying to do increase contrast or decrease contrast I'll drag down to increase our up to increase another way that you can remember which direction to drag when you're trying tio adjust your mid tones like that in, you know affect contrast is the steeper the curve is the more contrast you get casey so to increase contrast you want to steepen the curve which is why we dragged down but again it's just like a dimmer switch if you want to darken the image dragged down as a result, you will steepen the curve which increases contrast if you wanna flatten out the contrast, you want to decrease the contrast that's lightning so just like a dimmer switch we're going to drag up toe lighten it and in doing so your curve is not going to be as steep, which means there's going to be less con dressed and basically that is all there is to curves let me show you one more thing just like with the levels adjustment we have access to the individual color channels this seriously powerful ludy right here because often times when you're adjusting the composite like we just did, you can introduced more of a color than you want tio so if we look at our before and after, I've got an extra dose of blue in my image now that I have adjusted those points in curves so what I wanted to you now to fix that and I could create another curves adjustment to do this if I wanted tio in fact, why don't we just do that? We'll go ahead and create another curves adjustment layer click the half black half white circles the bottom of your layers panel choose curves and this time what we're going to do is from the channel pop it mean you above the curves grid we're going to choose the color channel that we have too much of so we've got a little we've got an extra dose of blue that we want to get rid of some and choose blue and now I can use theon image adjustment tool again on that particular color channel so I can give it a click to activate it mass over to my image to the offending blue and again I can see that point on my curve well, I might not have otherwise known where to click on that curve to affect that particular shade of blue, but I don't have to worry about that using the un image adjustment tool so I can click to set an adjustment point on the part of the blue that really is a little bit overpowering for me and then use my, uh, upper down arrow key to change it according to what I want to do. Okay, if I want less blue in the overall image that I'm in a drag down a little bit okay, decrease. When you're dealing with individual color channels, you can think of the up and down as increase or decrease, okay if I were to uh take that point and move it up it looks like I'm adding more bleeding my image ok, so when in the individual color channels when you're trying to decrease the color you want tio, use the down arrow key and that's easy for me to remember because I think oh, do I want to increase color? Okay, go up for john when a decrease that color okay, go down a little bit so now we can take a look at just what that last curves adjustment changed so here's the before and here's our after so we decreased the amount of blue we had any image and so it as a result it warmed the image up so it has less of a blue cast tio this one with this the last curves adjustment temporarily hidden with the visibility eyeball looks very cool in tonality to me but when we turn that last adjustment back on now it warms it up. Okay, so it's got a little less blue in the image so you can use curves when you want to be extremely precise with your color in lighting corrections it is very, very powerful thinking it is kind of you know, if you don't know how to use it it can be extremely scary but you can have up to sixteen points on that curve so that's sixteen adjustments tio lightness or brightness values and color values if you dip into the individual channels that you can make versus the three adjustments that you can make in levels okay any questions on that we're going to look at this on one more image all right, everybody understands curves we wait what's the curvy line in the pencil over by the graph do what's the curvy line in the pencil the pencil lets you ah hand draw your curve yeah and then once you hand dry your curve with the pencil can you even imagine then you can click this little tool right here which will smooth the curve that you've hand drawn weii do have questions lisa of course we do. Sam cox has a question how do you do it? One curves adjustment point how do you delete one curves adjustment point? You just click and drag it out of the grid okay, thank you just to clarify for katie higbee would you ever use curves and levels together or they just doing the same thing in a different way? They are doing the same thing in a different way however you've got three distant points and levels and you've got sixteen and curves so I guess you could start out with levels and if you encountered a problem that you can fix within levels and you could use curves but then that would just make me use curves to begin with so you can start out with levels and see if you can get the image so looking like you think it should look and if you can't then I would ditch that levels adjustment layer and just do it and curves so probably end up with a better result but there's nothing wrong with having a curved adjustment and the levels adjustment layer there are no layer police that are going to show up on your doorstep if you do that pumpkin p would like to know what does output and input mean what is outputting input mean these little guys right here the output input fields you'll see them in the levels adjustment as well they let you determine how dark here blacks are and how light your whites are in output okay so in days of old you couldn't really trust your printer to accurately print black especially printers used to always print black way too dark and it just plug up all of your shadows, so this is a way for you to say, yeah, I know you think that's black, but I'm really not willing to let my black being any darker than insert your own numeric value here. So that's a way to control how the image prints we really don't have to worry with that quite so much the's day, so I honestly don't use thes fields at all, and I just used the adjustment points on the curves, curves, graft, we'll follow up questions from laura's me how concolor adjustments be isolated onto on lee the sky and not affect the marble and curves only on the sky. Well, you could use the on image adjustment like I just did, and since your skies probably blew, you could go into the blue channel to effect that. But no matter what you do in the curves adjustment, if you don't want that change to apply to your whole image, then just like with any other adjustment layer, you can use the layer mass to hide the adjustment from that area in your image. And if you don't want to hide it completely, then paint with gray instead of black, I believe it's sixteen in each channel, yeah, but bear in mind that you've already got two points on there that you cannot delete ok, so you can't add sixteen. You can add fourteen because two points are already there in every channel. All right. How about we pop this? How about we pop open another curve, suggesting it on a different image. And this time I want to take a little spin through the presets. Veteran curves. So here's, my original image. Yeah, it's. Not very good either. Is it? Looks better here. Super, super five today. Okay, so what I started out with this image is I created a curves adjustment. I'll go ahead and delete that one. Okay, so click the little half black, half white circle with the bottom of your layers panel to choose curves. And this time let's, look at some of the priest says that, aaron, that pop up menu at the very top of the of the panel here. They're really, really useful. Okay, so try these out. Seriously. Nice. Follow one. Go through every one of them. So, let's, take a peek at a few of these interesting effect, huh? That was the color negative. And you can see here in the curves grid what is happening? So these colored lines represent the curve and the individual color channels, so you're seeing what's happening with those which is kind of fun. So let's just take a peek through all these cross process that's a fun one that's a popular effect right now across process look so depending upon your image one of these presets may give you a fantastic starting point okay so here's one that's pretty useful increased contrast and you can take a peek at the curve to see what is happening here okay so to increase contrast ok so we've taken pixels that were this color okay with this point and we've made him darker over here okay I get that and what quadrant are we and what column are we in the shadows okay I understand that and the other two points that that preset added for us are in their highlights calm okay so okay it took it and made a point here and if we draw a straight line down we can say ok that's what that color that's what that lightness value used to be and now if we draw a straight line over to the left we can see what photo shop changed it tio that one's a little harder to tell the difference because it was very very subtle and then another aja doesn't point appear so that can be a great learning tool you know going through those pre says the one I like for this particular image I think I started out with was strong contrast looked the best to me so one of those presets may really improve your image and then from there you can find tune those adjustments so you can start with a pre set and then have a go with your on image adjustment tool okay, so now I've got a few points on my curve already I can continue find tainting the way that image looks by adding more points, so I'm going to click the on image adjustment tool and now I'm gonna come over to my image and I'd really like this yellow part that to be a little bit darker, I'd like to have a little bit more contrast in my image so I can click and drag or click to set a point in the nudge my curve down with my arrow keys because it just doesn't take much movement to affect a very large change and the arrow keys can help keep you from going overboard. Well, if in doing that, then I darkened my my highlights more than I wanted teo I can simply click in an area that I want to change maybe somewhere over here to add another point and I can't drag up and now I'm lightning those areas back up so now let's take a peek at our before and after image by targeting the visibility I often on so there's our before he looks even worse now than then and there's are after but you can't even tell that was red hardly before we made that change so that's another way to use curves, you can start out with a pre set and then add your own points in addition to that, using the on image adjustment tool and again, if in creating some of these changes, you introduce a color cast that you don't want let's say I didn't want to see that much red I could then at another curves adjustment and go into the red channel on lee and affect how much red is going to be in my image. Now you wouldn't have to create a second one to do that. You could do it within this single curves adjustment right here. I wouldn't, though why not do each thing separately so you can toggle the visibility I often on to see what kind of effect it's having? No, because if you go into the red channel and adjust that within this curves adjustment that you have going on now, then it's it's more difficult to see the effect of just that one change. So when I start going into the individual channels of curves, I create additional curves adjustment layers. Before I do that, I do as much as I can on one curves adjustment in the composite channel. And then I'll create another curves adjustment and then go into the individual color channels if I need tio that just gives me a quick before and after view by showing your hiding that additional curves adjustment layer and again, just like before. If there's a part of the image that you don't want to apply, this curves change to just click within the layer mask let's say, for example, that we didn't want this background area to brighten up hey, so I've clips to activate my layer mask on my curves adjustment layer I mean the press be to grab the brush tool in painting either with black or gray, because black conceals white reveals grade as a little bit of both, so I've still got gray as my foreground color ship, so I could come in here and hide that curves adjustment from this background area, and then you see my brush strokes updated over here in the mask and again remember you've got opacity control with each of these layers that you create, so don't panic if it looks a little bit too overdone while you're messing around inside the curves panel here the curves adjustment panel because if it looks a little bit too strong, you can simply activate that layer and back off of the opacity a little bit so hugely powerful stuff with using adjustment layers and there's just simply no reason to be scared of either levels or curves because as long as you're using those tools as an adjustment layer and that's all we've been doing in this part of the class you're completely safe if you destroy the image, press the delete key, get rid of it. You have not messed up the original image, ok? Any questions on that? Never gonna hop into serious retouching? I have a question would you have a question of audience? I have a question from phil cream who would like to know what if you want to change brightness without affecting the color at all? Well, what is fueling change brightness without affecting the color at all? I don't know of a way to do that and curves because in adjusting one, you really are adjusting all of it because the levels of brightness affect the colors that you see hey, so I don't really know of a way to do that. Yes, please, I couldn't use the luminosity blend mode because he went to use the luminosity blend mark. Yes, you could. How did that right when you said that? Ok, so when uh one method for doing that would be to change the layer blend mode in which the levels or curves adjustment is happening okay, so just to reiterate the's blend modes change how color on one layer is interacting, blending with canceling out color on other layers if you want to ensure that you're not getting any kind of color shift in either levels are a curved adjustment layer you can change this blend mode menu at toe luminosity anything it's the very last one in the list it is so let's keep it out our image in let's see if we can tell the difference for when we switch this blend mode I see a little bit of a difference yeah so it just forces the adjustment toe happen on leon the lightness values of the of the image great question in great solution go team creative team creative live a question from olga does it matter which dropper used when making random selections in the image? Does it matter which dropper you used the adjective I droppers yes, because they're filled with color. Okay, so this eyedropper effect shadows this one effects mid tones this one affects highlights so you just need to look at the eye droppers and you can tell but she can use these in exactly the same way as we did in the levels adjustment to telephone a shop what really should be black but really should be why and what really should be about fifty percent great question from laura's me if I select with quick slug tool a part of the image and curves and then in verse what it prevent changes to the selected area so I have to make a mask? Yes, if you create a selection before you invoke curves and we'll just do that real quick so I'm gonna go grab the quick selection tool let's say that I knew in advance that I on ly wanted to mess with this turret okay? So I can create a selection of it if it's got enough contrast okay we'll call that good now only create are adjustment layer and it doesn't matter which adjustment layer this would the same thing would happen no matter which one the mask that comes along with the adjustment layer is going to be filled in automatically you see that so if black conceals and white reveals, if you start with a selection before you create your adjustment layer, you are restricting that adjustment to the area inside the selection so that would keep you from having to fill in the mask by hand, which is the way I usually do it hey, but if you can get a selection, if you've got enough contrast in your image to get a selection of the area that you want to change, then you can certainly start out with a selection, then create your adjustment layer if father shops going to fill in the mask for you according to what you had selected so now if we use one of those curves presets it's on lee being revealed on the area we had selected to begin with I'll do that first because it's really stark so that illustrates that a little further there question from sam cox can curve adjustments be named and saved to be used on other images so can you make your own presets well you can find the adjustments panel or from the right hand side of your screen and it's gonna have a little fly out many this little guy right here looks like four lines with a downward pointing triangle you're going to give that a click and then click save curves preset and when you do that for the stops going to ask you to give it a name we're not going to do that let's say you did then you click save we conclude cancel and then you can go up to the same menu let's say on another image and choose load curves preset and navigate toe where you save the other one okay so you would name it something meaningful like super high contrast or leases ab fab curves preset you know something meaning people like that so that's how you would do that another way that you can apply a curves or any kind of adjustment layer to another image let me go ahead and uh throw away the layer I made a moment ago change my blend move back tio normal so they get more of a color change with this photo now, let's, say, I wanted to apply this to another photo or syriza photos, I could open up the other photo and I was gonna go grab this guy right here, open him up and then always at the same picture that's ok? If it isthe, we're going to use our arrange documents icon at the top of the screen and the application bar, and we're going to use that to a preview. Or however many images you have open and you can drag those adjustment layers into other open documents just like you can any other layer. So if you've created a levels adjustment layer or a curves adjustment layer and you have let's, say, ten more of those images that were shot on your similar lighting conditions, then once you get it perfect and one of them, you can simply click and drag the layer thumbnail of that adjustment layer and two the other open document. So that's a nice, nice little thing you do want to hold down the shift key, I believe. Ok, so if I hold him the shift key when I drag that into the other image? Yes, then that adjustment layer centers itself on the image, and it looks like my images or two different sizes. And they might be so that's. How you would apply, occurs, or a levels adjustment to more than one image, either save. It is a pre set and, in the levels, dialogue. You have the same thing. You can save presets by using that fly out menu. Or you can just drag and drop the adjustment layers into the image, which is very handy thing to do.