In Epson Scan software, the Histogram Adjustment window shows the input histogram of the image being scanned. Clicking the "Show Output" button shows the output histogram that is the result of all the color transformations.
As mentioned in a previous question, I thought I turned off all color transforms by doing these steps:
1. Turned off Auto Exposure by clicking Reset button.
2. Turned off all adjustment checkboxes (Unsharp Mask, Color Restoration,
Backlight Correction, etc.).
3. Go to Histogram and set Input to 0, 1.0, 255, and Output to 0, 255.
4. Go to Tone curve and ensure set to default Linear curve.
5. Go to Image Adjustment and ensure all zeroes.
So I was expecting the "Show Output" button to show an output histogram that exactly matched the input histogram. But when I do this, the output histogram is slightly shifted.
Is this shift only because I kept Color configuration set to color management with sRGB as the target?
I learned about the "No Color Correction" setting Syd mentioned in the previous thread, and tried that out as well. But with that option selected, the Histogram Adjustment button becomes disabled, and I no longer have access to see the output histogram to confirm directly.
Just looking for a confirmation that my understanding is correct, or if I'm missing anything.
For background, I am using an Epson Perfection V600 with Epson Scan version 22.214.171.124US to scan photo prints in Professional mode.
I have used this product for: 1 week - 1 month
I use this product for: Personal