The third region we examine when adjusting contrast are the pixels in the face, which should be between 65 and 75 IRE at their brightest. As you can see, the darkest pixels are 20 IRE or above, which is the cause of most of our contrast issues. As you can see, the whites start at about 80 and range up to about 95.īlacks, such as those we see on the bottom edge of the whiteboard-and directly below the cluster of whites in the waveform-should be right around 0 IRE. In a well-lit, well-contrasted scene, the whites should be up around 100 on the IRE (Institute of Radio Engineers) scale, which ranges from 0 to 100. We can see where the white and black areas of the image are represented in the waveform, but the levels aren't what they should be in either case. So, over on the left of the video in Figure 6 (below), we see a whiteboard, and over on the left of the waveform, we see a clump of pixels that represents the brightness of the pixels in the whiteboard.įigure 6. What does the YC Waveform show us? Basically it shows us the brightness of the pixels at their respective location in the frame. So choose YC Waveform to return to just that view. I like working with just the YC waveform and don't get a lot of benefit from these other three scopes. Figure 5 (below) shows an RGB parade, a YUV parade, a waveform, and a vectorscope. Click All Scopes to see all the scopes available.
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