If this is in the wrong sub fora, I apologize and could one of our excellent Mods move it, please!
I've been using FastStone Image Viewer as my main basic editor. Catalogs my photos pretty well and I can do my typical minor adjustments quickly and easily.
Recently, I opened a new bank account and one of the little perks is that I can give them an image file and get one free custom ATM/debit card.
Cool, I have a few shots that look good at the small size and so I chose one. After editing for size/crop and a minor levels change, I saved it as usual--an RGB jpeg--and uploaded the file. The preview showed me my photo as magenta and green with a little yellow. NOT anything like the original.
SO, I saved a copy as Grayscale and that one looks fine. But the photo itself isn't at its best as a BW conversion. So I also saved it as YCbCr (the next choice down the list in the pop down menu) and that
file looks fine. This is the preview and I don't know what the actual card will look like, yet.
FastStone gives me several options to "save as" for jpeg files:
along with various "quality" settings.
Which, finally, leads to my question.
Which should I be saving in for most things?
If I'm sending a file for a print, I save as RGB jpeg at best quality--(I have all my scans saved as TIFF and edit on copies, save the result as its own file)--and send it to my printer. If I'm printing at home, I use either RGB or Grayscale jpeg.
CMYK is based on color separation printing, if I recall correctly?
The other two I don't know about.
I use MPIX as my primary digital printer and they will print just fine with RGB files, I seem to remember that we needed to send CMYK files for the Rangefinder Forum book and I've used CMYK in the few Blurb books I've made--I think. It's been a few years since I made one.
And, yes, I am googling this as I'm posting this here but I also trust my fellow RFfers a bit more than random internet sources.