Color Shift Issue When Expanding PNG in Photoshop

Question

Hello everyone,

I’m experiencing a frustrating issue with color shifting when expanding PNG images in Photoshop, and I’m hoping someone can help me troubleshoot.

Here’s my workflow:

1. I start with a video recorded on an iPhone in MOV format.

2. I convert the MOV to MP4 using Adobe Media Encoder (H.264 format, average bitrate).

3. I import the MP4 into Premiere Pro and take a screenshot from a frame, exporting it as a PNG.

4. I then open the PNG in Photoshop to expand iand export it again as a PNG (Multiples times) without keeping the sRGB profile.

the flow is like this video here

The problem: After expanding the image in Photoshop, I notice the colors often shift, especially when I try to expand the image multiple times. I’ve tried adjusting color settings, changing profiles, and various export options, but the colors still don’t match the original frame accurately.

Has anyone encountered a similar issue with color shifts when expanding or resizing images in Photoshop? Any advice on settings or steps I might be missing to maintain color consistency throughout the process?

Thank you in advance for any insights!

D Fosse · Answer

A screenshot is no longer in the original color space. It has been converted into monitor color space.

To match a screenshot to the original image, you need to first assign your monitor profile, then convert to the document color space. In this case that's presumably sRGB.

Exporting without profile is also introducing uncertainty. I'm aware that video generally does not use icc profiles, but every image is created in some color space. In Photoshop, the working color space takes effect if there is no embedded profile.

So this isn't about absolute accuracy, this is about matching one color space to another. If they do not match (or are converted), the same numbers will produce different colors.

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