quote:
Originally posted by Hardin:
I used Corel just to crop and otherwise tweak the photo. It was uploaded as a JPG, which I have since learned is second choice format, after PNG. I think I should try again in PNG format, maybe 200 dpi
I usually adjust the levels on my photos when preparing them for print.
Some graphics programs eg. Photoshop have a histogram graph of the tonal range in the Levels control dialogue panel.
Generally digital cameras tend to underexpose slightly so subtle details aren't lost in the highlight areas due to over exposure or tonal clipping. But generally this means most digital photos will be a little subdued and need to be adjusted for printing
You often find the top of the histogram graph will be flatline or at very low levels, actually I have a habit of underexposing slightly any way so this is often the case with many of my pictures and this is intentional because I don't want to lose tonal subtleties in the highlights.
Ideally when you are adjusting the levels you want to pull the slider to around where the histogram starts, you can sometimes go a little beyond that but not too far or you will lose subtle details in the highlight areas.
By doing this you lighten the image and make the tonal range of the photo fit the tonal range of the entire digital tone/color spectrum, and standardize the tonal range independently of monitor variations.
Saying that it does help to have one's monitor Gamma setting fairly accurate as well, because although the histogram is a big help, if your levels control has this feature (some don't) sometimes you need to be able to adjust things by eye as well.
But adjusting the levels should do the trick because the tonal range of your image will then conform with the entire tonal range of the digital spectrum, so you are in effect increasing and standardizing the tonal range, it's similar to what "Normalisation" does to a digital music sample.
Actually you can also use auto-levels, which might be easier, but I prefer to do adjust the levels manually myself because most things that are "automatic" can sometimes get it wrong, but that is an easier method.
