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Post #989167

Author
DrDre
Parent topic
Info Wanted: Removing Black Crush in Star Wars
Link to post in topic
https://originaltrilogy.com/post/id/989167/action/topic#989167
Date created
30-Aug-2016, 3:20 AM

Video Collector said:

Looks better, quite good in fact. If details can be retrieved from within the blacks they are per definition NOT crushed, though. I believe the black level on these films was deliberately set to hide the garbage mattes as much as possible.

Indeed, true black crush implies the details are lost. There are only 256 possible intensities for each color channel for 8 bit color. The original film has a practically infinite number of intensities. If you crush the blacks, it means that you adjust the color curves to such an extend that dark colors all have such low value on the intensity scale, that in the 8 bit color space they all become 0 or black. Additionally, even detail that is still slightly visible, will not be fully resolved, resulting in steep color gradients/artifacts, if you attempt to retrieve detail.