Color Edits in PitStop

[JeffereyT1971]

Recently I had to make some color edits to some supplied PDF's that we were printing with. A simple Curve and a Contrast/Brightness correction was applied using PitStop. On the majority of the pages the global corrections were what was needed. There were a few pages that required some further corrections to the images but were not global changes. So my thought would be to go back to the original image, export and in Photoshop, apply the same color adjustments I made in PitStop. As I mentioned these were very simple edits but the results from PitStop and Photoshop were drastically different. I have determined that what caused it to be so different was was the Contrast/Brightness (+10/+10). Unlike Photoshop, PitStop removed everything below 10% where as Photoshop adjusted the values relative to the percentages. Has anyone else come across this or know if there is a preference that can be set to make the changes in PitStop to match Photoshop?

[Robbie]

I never do my color corrections in Pitstop always from the source file in Photoshop. Mayby there are colorsetting used in pitstop and photoshop, RGB ore other profiles used that can make some difference within pitstop and photoshop.

[bens]

PitStop's brightness/contrast adjustment was written quite a while ago. At that time, it matched what Photoshop did. But Photoshop has changed its algorithm completely since then - but they still offer the "legacy" variant. This is a checkbox in Photoshop's brightness/contrast panel. You could try using that one, see if it better matches PitStop.

I'm not sure whether this "legacy" variant is exactly the same as it was a long time ago - I feel like they've done many different variations and tweaks in the brightness/contrast tool.