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Still images too bright on tv
I’m working with slideshows and i work the pictures in photoshop. I apply them “automatic level” (for bright and contrast) because sometimes they are to dark. But, when i see the final video on the tv, some of them appear too bright that the face gets a distortion, sometimes de eyes, the teeth. What am i doing wrong? by the way, im using two video tracks, one for the frame in which i put a crohma keyer effect, and under it the pictures.
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5 Replies
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First of all, I never use any “auto” feature of any kind, simply because it makes it’s own decisions as opposed to what I might want to see.
When I applied the Auto Levels filter to an image and then brought it into Vegas, the whites were raised and subsequently clipped shikle the blacks were lowerered and also clipped.
Video is a very different workspace.
Still images have the full luminance range of 0-255 while Vegas deals with a luminance range of 16-235.I rarely use Photoshop for anything other than scratch and dust removal.
Everything else is done in Vegas in conjunction with a good monitor and the Waveform/Vector monitor.The first thing I do with all stills is to apply the Secondary Color Corrector FX and choose the Computer RGB to Studio RGB preset.
This corrects the luminance range from 0-255 down to 16-235.
The image appears to be a bit more washed out on a computer monitor but it’s fine on a properly calibrated video monitor.
If any tweaking is needed, then I use the Color Curves and/or the Levels filter to et things where I want them.VASST has an excellent DVD titled Color Correction in Sony Vegas that I recommend to anyone who’s serious about taking this process to the next level.
For $59, it’s an excellent way to learn the tricks of doing this effectively. -
Video has limits as to how bright your TV will display without distortions on the screen. Your autolevels in photoshop is setting maximum whites for photographs. This may be be to bright for video. In broadcast video we even have what is called legal levels for the whites, blacks and color saturation. If you exceed these legal levels you can have problems with your display, in some cases buzz in your audio, and certainly no broadcaster will air it. Check into Photoshop’s help file for legal video levels. Hopefully you will find the correct workflow there.
Also, Vegas has a broadcast filter which you can apply to the master video track to keep your video levels legal.Perhaps someone else can come along and give you some advice on creating legal video levels in photoshop.
Regards, Rick.
Rick Mac
Director of Audio Production
TCT Network – Directv 377 -
Here is a link to a tutorial that can help you better understand video levels, and how to read your scopes in Vegas.
https://www.wideopenwest.com/%7Ewvg/tutorial-8.htm
Rick Mac
Director of Audio Production
TCT Network – Directv 377 -
Here are a few more “exposure” articles for you to browse through.
Correcting Exposure in Sony Vegas (2 parts)
Are You Exposed? Repair Exposure Issues Quickly with Sony Vegas 5
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Thanks a lot! now i have a better understanding of why that was happening.
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