Resolution Change

[BalkyNY]

I do not know what is happening. Every now and then the resolution of my image changes by itself or because mystically something was pressed. I work in PS 7.0. I was working on this image which I scanned at 300 dpi and scaling at 200%. Once scanned, the resolution was 300 dpi; however, when I was done with editing, the resolution of the image was 72 dpi. HOW!? I did not change it.
If you know what the answer might be to this, please let me know.

Thanks a lot.

[Gary Hummell]

Without knowing the steps you used, it is hard to guess. Possibly you cropped the image and did not notice that the resolution was set at 72.

If you can recreate the problem and tell us the steps you used, I am sure this can be solved.

[dave milbut]

72PPI is the default resolution. check it immediately after scanning (image> image size). if you need to change it w/o affecting the rest of your image, go into image> image size and uncheck the resample box. then change the resolution to 300ppi and hit ok. the resolution will change, but not the pixel dimentions or the file size.

[dave milbut]

scanned at 300 dpi and scaling at 200%.




also afaik, you gain nothing by scaling during scanning. PS's bicubic interopolation will probably do a better job than the scanner. not POSITIVE about this, but it's probably worth it to do a couple of tests on your end to see. scan at 200% then scan the same at 100% and resize using ps. (make sure bicubic interopolation is your default resampling method in edit> prefrences> general). then compare the 2 results. you may be suprised.

i've learned to do most of my adjustments in ps. scan only raw data at 100% zoom with all scanning sw adjustments off (color corrections, tonal adjustments, sharpening, etc.) and ONLY at the maximum OPTICAL resolution the scanner will allow. fort example, if your scanner is 1200dpi optical resolution but gets 9600dpi w/interopolation, scan at 1200dpi and do any adjustments in photoshop.

just my 2 pence.

dave

[dave milbut]

scanned at 300 dpi and scaling at 200%.




also afaik, you gain nothing by scaling during scanning. PS's bicubic interopolation will probably do a better job than the scanner. not POSITIVE about this, but it's probably worth it to do a couple of tests on your end to see. scan at 200% then scan the same at 100% and resize using ps. (make sure bicubic interopolation is your default resampling method in edit> prefrences> general). then compare the 2 results. you may be suprised.

i've learned to do most of my adjustments in ps. scan only raw data at 100% zoom with all scanning sw adjustments off (color corrections, tonal adjustments, sharpening, etc.) and ONLY at the maximum OPTICAL resolution the scanner will allow. fort example, if your scanner is 1200dpi optical resolution but gets 9600dpi w/interopolation, scan at 1200dpi and do any adjustments in photoshop.

just my 2 pence.

dave