Doom9's Forum - View Single Post - U-V-Swap issue

Frank62 · 11th September 2018, 13:32

Hi,

I got copies from older tape recordings (1'') of a series. About ten to 30 times in more than one episode a problem with the colours occurs: Obviously U and V are swapped.

I first thought I could build a detector for this, seemed not too hard because the right black margin expands a few pixels each time the swapping occurs. So far so good, BUT:

The channels are not swapped in the whole frame. Only rectangular parts of the picture, the rest keeps correct.

Has anyone an idea how to build a mask that is transparent only where UV swapping occurs and opaque on the rest of the picture?

Thanks for any idea.

11th September 2018, 13:32	#1 \| Link
Frank62 Registered User Join Date: Mar 2017 Location: Germany Posts: 234	U-V-Swap issue Hi, I got copies from older tape recordings (1'') of a series. About ten to 30 times in more than one episode a problem with the colours occurs: Obviously U and V are swapped. I first thought I could build a detector for this, seemed not too hard because the right black margin expands a few pixels each time the swapping occurs. So far so good, BUT: The channels are not swapped in the whole frame. Only rectangular parts of the picture, the rest keeps correct. Has anyone an idea how to build a mask that is transparent only where UV swapping occurs and opaque on the rest of the picture? Thanks for any idea. Last edited by Frank62; 11th September 2018 at 13:37.