When you get into the heavier side of video editing in Adobe Photoshop, there may be times when you need to use multiple video clips, as opposed to just one, inside of your overall project. During those times, it’s important for all of the clips to be consistent with their lighting. You wouldn’t want any one of them to stand out as awkwardly different from the others. Unless, of course, that’s the look you’re going for. Some clips may need exposure correction while others don’t. Bringing each one in line with the others is an important part of working with video.
In today’s post, I’m going to work through the process of correcting a slightly over-exposed video clip in Adobe Photoshop. I’ll be using an adjustment layer to accomplish this alongside the histogram. In these cases, the histogram is an indispensable tool that can aid with not only the entire spectrum of colors, but the separate reds, blues and greens as well. Don’t worry, this process is very straightforward and if you’ve ever worked with adjustment layers before, this shouldn’t be a problem at all.
Today’s Demo Video
I took a quick screenshot of the video I’ll be using. It’s a clip of someone sitting at a table eating a sandwich. If you take a look at this screenshot, you’ll see that it is somewhat over-exposed and a little brighter than it should be. I’d like to see some more contrast in there with a bit less brightness.
Viewing the Histogram
Histograms are often overlooked pieces of information that are usually available in DSLR cameras as well as many photo and video editing applications. They tell us how light is distributed across a photo or video. Some of them even tell us how the reds, blues and greens are separately distributed. This is very helpful if one of these colors is out of whack. It might not be obvious that there’s too much blue or red in a video, but by looking at the histogram, it can be plainly obvious.
We have a histogram panel available in Photoshop. It’s probably not visible by default, so we’ll need to open it up by visiting the Window > Histogram menu item and clicking.
When the panel appears in the workspace, we can drag it into another cluster of panels, so it’s more off to the side. I dragged mine into the Colors, Swatches and Libraries cluster of panels. Let’s take a look.
Now, if you’ll notice, the histogram is showing the overall RGB spectrum as well as a few individual colors. Let’s see how we can adjust each of these.
The Levels Adjustment Layer
To make my adjustments today, I’ll be using the Levels adjustment. To apply this adjustment layer, I’ll simply click its icon inside of the Adjustments panel.
When I click this icon, a few things will happen. First, a new layer will appear inside of the Layers panel. This is the adjustment layer and since it’s been applied above a video layer, it’ll be clipped, meaning it’ll only apply to the layer directly beneath it. So if I had additional layers beneath the video layer, those layers wouldn’t be affected by any changes I make here.
Also, the Properties panel will pop open for the Levels adjustment layer. It’s inside of this Properties panel that I’ll be doing most of my work today.
At this point, I’d like to let you know that we could easily adjust the exposure by pushing the sliders in the Properties panel. It wouldn’t take more than a few seconds to correct this video and move onto something else. I’ll do that layer in this post, but right now, I’d like to point out that we can adjust the individual colors if we wanted to. If you’ve ever taken photos or video of flowers, for example, you most likely know that just the specific reds or yellows can get blown out (too intense), while the rest of the image is fine. The technique I cover next will help you deal with situations such as these.
Playing With the Reds
Let’s take a look at the reds in the histogram for a moment. Notice how they’re separate from the other colors. Actually many colors are separate, but we’re only focusing on the reds right now. Now, if I click the drop-down in the Properties panel that currently says RGB and choose Red, I’ll see a new histogram appear in that panel. This new one strips out all the other colors and shows only the distribution of reds in the video. I’ve outlined the Red histogram in the screenshot below.
If you look closely, you’ll see that this new histogram in the Properties panel matches almost exactly with the one that’s in the Histogram panel If I cut and paste these histograms on top of one another, you’ll have a clearer view.
My point by showing you this is that we can adjust the histogram in the Properties panel and as we do that, we can see how those changes result in the overall spectrum of light with the other colors. Because the histogram in the Histogram panel includes the other colors, it’s easy to see how our changes fit in with them. I know this is sort of convoluted, but I can’t think of a better way to explain it.
Perhaps a quick example will help. If I’d like to alter how the reds appear in the overall video, I can adjust the output value of that color specifically. Below the histogram in the Properties panel is a horizontal bar that goes from black to white. If I click and drag the white slider to the left, I can effectively reduce the level of reds in the video. In this next screenshot, you’ll see that I circled this output slider. Also notice how the reds in the Histogram panel have been reduced.
If you’d like to experiment with your own images or videos, be sure to adjust each color and the RGB setting, along with this output slider. You’ll quickly get a feel of how things work. Just be careful when adjusting the individual colors though. If you go too far with any of them, you’ll end up altering the color of the entire clip. This is great if there’s an unwanted color cast, but not so great if the colors are already the way you’d like them to be.
Reducing the Overall Exposure
Since the individual colors are okay in this video, I won’t touch them. I will, however, complete the process of adding contrast and reducing exposure. Doing these things is very simple with the Levels adjustment layer.
In the Properties panel, I’ve changed the drop-down value back to RGB. From there, I’ll push the Output slider to the left a bit, just as I did in the example above. This will reduce the highs somewhat. After that, I’ll nudge the blacks slider to the right, so the darks in the video get darker and then I’ll push the whites slider to the left a bit, just to add some brightness to the existing whites. Since I want an overall less exposed video though, I’ll push the center gray midtones slider to the right, which will darken things overall. Here’s what the values in the Properties panel look like now.
Notice how the histogram had been altered. It looks completely different.
Here’s the final screenshot of the video.
I want you to understand that the example I used today was to match this clip with other hypothetical clips I was using for a project. The output may have warranted some more brightness or darkness, depending on how the others appeared. Either way, this post should show you the process of how things can get done. If you have any questions regarding this post, please leave them in the comment section below. Thanks for reading!