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Adjusting luminance

From: Premiere Pro CS5 Essential Training

Video: Adjusting luminance

Another Color Correction task that you'll perform quite frequently is that of adjusting luminance, or in other words, the brightness of a clip. Oftentimes, it's tough to get the right exposure when you're shooting video, especially if it's kind of like a run and gun situation, where something is happening in front of you and you don't have time to set up a big lighting crew and everything for it. You've just kind of got to shoot. So we've got this clip here that's a little bit underexposed. Now previously, we've been using Brightness & Contrast. If you just search for that in the Effects panel and just apply that here, you can work with it. Open up Brightness & Contrast and there is Brightness value here, but typically, you would not want to use that.

Adjusting luminance

Another Color Correction task that you'll perform quite frequently is that of adjusting luminance, or in other words, the brightness of a clip. Oftentimes, it's tough to get the right exposure when you're shooting video, especially if it's kind of like a run and gun situation, where something is happening in front of you and you don't have time to set up a big lighting crew and everything for it. You've just kind of got to shoot. So we've got this clip here that's a little bit underexposed. Now previously, we've been using Brightness & Contrast. If you just search for that in the Effects panel and just apply that here, you can work with it. Open up Brightness & Contrast and there is Brightness value here, but typically, you would not want to use that.

I kind of broke my own rule in the last movie, just so I could explain Contrast. But here is why this effect is a no-no, usually. I want you to watch these shadow areas. If I increase Brightness, it's going to make all of the pixels universally bright. If we take this to a negative value, it's going to take our highlights and make them a little bit darker. It usually does a little bit better when you're darkening footage, as you could see these highlights remain bright, which is kind of cool. So, if you wanted it seem like it was very dark in here, we still have these cool little highlights here.

But again, if we're going to brighten it, it's going to make all these values be bright as well. So, I like to have a little bit more control over my luminance changes. So I'm going to select Brightness & Contrast and hit Delete. The real powerhouse effect for color correction - and actually, let me resize the Effects panel. I want to close out this Search result. Open up Video Effects > Color Correction. There is two of them here. There is Fast Color Corrector and Three-Way Color Corrector. Three-Way Color Corrector is just a more advanced form of Fast Color Corrector, but as you'll see, Fast Color Corrector is plenty complex for our purposes, and most of the Color Correction tasks that we'll talk about in this chapter can be performed with the Fast Color Corrector, or through a Color Corrector effect.

So I'll just go ahead and drag and drop and apply Fast Color Corrector. As we open this up here in the Effect Controls panel, we'll instantly see this is significantly more complex and powerful than anything that we've seen so far. Here, there is White Balance built into the Fast Color Corrector. There is Saturation adjustment built into the Fast Color Corrector. We could also adjust a Tint, which we'll look at in the next movie. We could also adjust Luminance and Brightness here. So what I could do is come down here to where it says Input Levels. If I find that I'm not getting a lot of bright highlights, if I'm not getting pure white, then I can grab this slider on the right-hand side and drag this to the left ,and that will brighten our highlights.

Now, that's not really the problem here. We have really bright highlights up here in the left-hand side and these highlights on the bowl, but what we really need to do is just brighten the midtones, and not the shadows, the shadows are good where they are, but brighten just the middle ranges. So what we need to do is click and drag on this Midtone slider and drag this over to the right. Now we don't want to drag it too far, because it's going to wash everything out. But you'll notice that even as we do so, that the darker shadow areas remain kind of dark. If they don't, then we could grab this left Input Levels slider and drag this to the left to make sure those dark areas remain black.

But we don't want to drag either one of these end sliders too far, because once we do, it crushes, as they refer to it as, the highlights or the shadows. It crushes them. It forces them all to white, if we adjust this slider on the right, and it forces them all to black, if we adjust this left slider. So, notice how there is a little bit of detail here on the bag on the right. If we keep dragging this Input Black slider to the right, it's going to crush all those values to pure black. We're going to lose all that detail, all the texture in that bag, and that's not what we want. So, use those end ones sparingly but feel free to be a little bit more liberal with this middle one.

So we can move this up here a little bit and even if we wanted to, we can drag on the Saturation value. I think it's a little bit more saturated there. So, we can go back up to the top of our effect, and we have the fx icon, so we can turn off the visibility of this effect by clicking it there. So there is the original, and here is what we changed it to. Now, one thing I should also point out is that when you underexpose video footage, and it's dark like this, it gets noisy. So you saw that as we try to get it bright, that you could see a lot of this grain, a lot of this noise here.

That kind of makes things look a little less attractive. This is actually shot with a really powerful camera, a really expensive camera. So if you had a less expensive camera, like a DV camera or something like that, you're going to have even more noise when you try to brighten it. So again, if you have any say in how stuff is shot, make sure that when it's underexposed, it's not too dark, because again, the grain is almost impossible to get rid of.

Show transcript

This video is part of

Image for Premiere Pro CS5 Essential Training
Premiere Pro CS5 Essential Training

83 video lessons · 50897 viewers

Chad Perkins
Author

 
Expand all | Collapse all
  1. 4m 1s
    1. Welcome
      55s
    2. What is Premiere Pro CS5?
      1m 41s
    3. Using the exercise files
      1m 25s
  2. 16m 44s
    1. The Premiere Pro workflow
      2m 21s
    2. Adding footage to the Timeline
      2m 19s
    3. Understanding timecode
      3m 3s
    4. Making basic edits
      5m 15s
    5. Getting familiar with the interface
      3m 46s
  3. 21m 59s
    1. Setting up a new project
      3m 48s
    2. Creating a new sequence
      5m 30s
    3. Capturing and ingesting footage
      2m 51s
    4. Importing files
      5m 23s
    5. Sorting and organizing clips
      4m 27s
  4. 33m 19s
    1. Making a rough cut
      4m 0s
    2. Making preliminary edits
      4m 55s
    3. Creating overlay and insert edits
      4m 16s
    4. Using video layers to add B-roll
      3m 47s
    5. Using ripple edits and ripple delete
      3m 1s
    6. Performing slip edits
      2m 54s
    7. Using the Razor tool
      3m 51s
    8. Moving edit points
      3m 47s
    9. Navigating efficiently in the Timeline
      2m 48s
  5. 28m 45s
    1. The job of an editor
      2m 59s
    2. When to cut
      5m 54s
    3. Avoiding bad edits
      6m 31s
    4. The pacing of edits
      3m 47s
    5. Using establishing shots
      2m 44s
    6. Using emotional cutaways
      2m 1s
    7. Fixing problems with cutaways
      2m 48s
    8. Matching action
      2m 1s
  6. 21m 38s
    1. Using markers
      3m 31s
    2. Replacing clips
      2m 36s
    3. Exporting a still frame
      1m 51s
    4. Creating alternate cuts
      1m 25s
    5. Rearranging clips in the Timeline
      2m 15s
    6. Targeting tracks
      2m 32s
    7. Disconnecting audio and video
      5m 0s
    8. Reconnecting offline media
      2m 28s
  7. 9m 46s
    1. Adjusting the rubber band
      3m 13s
    2. Adjusting clip position
      1m 21s
    3. Moving the anchor point
      2m 50s
    4. Adjusting clip size and rotation
      2m 22s
  8. 8m 15s
    1. Changing the speed of a clip
      1m 58s
    2. Using the Rate Stretch tool
      1m 57s
    3. Playing a clip backward
      4m 20s
  9. 10m 26s
    1. Understanding pixel aspect ratio
      5m 15s
    2. Understanding frame rates
      2m 15s
    3. About HD standards
      2m 56s
  10. 10m 32s
    1. Using layered Photoshop files
      2m 31s
    2. Animating clip position
      3m 33s
    3. Fading layers in and out
      4m 28s
  11. 12m 40s
    1. Applying transitions
      6m 2s
    2. Using transitions effectively
      4m 41s
    3. Setting up the default transition
      1m 57s
  12. 38m 31s
    1. The importance of ambient audio
      6m 35s
    2. Cutting video to music
      7m 38s
    3. Changing audio volume over time
      9m 55s
    4. Fixing audio problems
      9m 57s
    5. Censoring audio
      4m 26s
  13. 16m 25s
    1. Creating censored video
      5m 22s
    2. Creating a lens flare
      2m 20s
    3. Creating a logo bug
      3m 27s
    4. Creating background textures
      5m 16s
  14. 13m 23s
    1. Intro to compositing
      1m 11s
    2. Removing a green screen background
      9m 14s
    3. Compositing with blend modes
      2m 58s
  15. 22m 37s
    1. Adjusting white balance
      2m 24s
    2. Increasing contrast
      3m 5s
    3. Adjusting luminance
      4m 30s
    4. Creating cinematic color
      5m 21s
    5. Creating a vignette
      3m 12s
    6. Creating a day-for-night shot
      4m 5s
  16. 16m 5s
    1. Creating titles
      4m 55s
    2. Creating a lower third
      9m 12s
    3. Animating rolling credits
      1m 58s
  17. 14m 13s
    1. Exporting sequences from Premiere
      3m 57s
    2. Exporting with the Adobe Media Encoder
      2m 13s
    3. The most common formats and codecs
      4m 42s
    4. Exporting portions of a sequence
      1m 54s
    5. Rendering letterboxed footage
      1m 27s
  18. 6m 46s
    1. Examining the other apps that come with Premiere
      4m 25s
    2. Working with Final Cut Pro
      2m 21s
  19. 20s
    1. Goodbye
      20s

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