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|| SportsShooter.com: Member Message Board
1D tone curve for JPEGs?
jeff martin, Photographer, Student/Intern
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wellington | OH | usa | Posted: 4:07 PM on 02.11.05 |
->> After reading previous threads, I'm not sure I get it. Do I need a different tone curve for different white balances. Does anyone have a curve that gives good results with JPEGs? Since getting a 20d backup/non action body, the colors on the 1D really look sick. Any suggestions. I know shooting raw helps but when trying to process sev. thousand event images to post it takes alot of extra time. I've found that any delay in getting the images on the web site really hurts sales.
Jeff |
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Ron Scheffler, Photographer
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Hamilton (Toronto area) | Ontario | Canada | Posted: 10:03 PM on 02.11.05 |
->> One properly adjusted tone curve will work for all light sources. The problem lies in the default 1D tone curve which renders images somewhat on the green/cyan side, and in my opinion, is also too dark in the midtones and shadows.
Also be careful when comparing the color between the 1D & 20D if you are shooting the 1D in Matrix 4 (Adobe RGB). The camera produced Jpeg files will not be tagged with the Adobe RGB color profile. To make matters worse, in the EXIF data, those files will be tagged as sRGB, and a number of imaging apps will pick up this false information (including some older versions of Photoshop, though I think CS is OK, as is PS7 with a special plug-in for Adobe specifically for this problem). If this happens, the 1D files will appear to be dull/muted.
The easiest solution to the profile problem would be to shoot in one of the other Matrix modes, which are all sRGB.
Another solution would be to use an app such as Photo Mechanic version 4 to ingest the 1D files and during the ingest, have PM embed the color profile in each file so that profile aware apps such as PS will open the file properly.
I suspect though, that even with a tone curve to fix the green, you'll still see differences between the two cameras. Part of that is due to the 1D using a CCD sensor vs. the CMOS in the 20D. (Perhaps a reason to upgrade to a 1D Mark II?)
If you do shoot raw files, at least one raw converter (from Phase One www.phaseone.com ), upon opening a contact sheet, will immediately begin building preview files. Once that has been done (usually a few minutes depending on the size of the folder), the preview files can immediately be exported as web resolution jpegs, at whatever size you specify, without having to "process" the raw files (but of course, the preview files are not the same high quality, but for web display, they will be fine). A benefit is that the images will have been created using Phase One's profile for the 1D, which renders much better colors than the out of camera jpegs. Also, you can apply custom adjustments to the entire folder, such as white balance, levels, curves, saturation, etc. and when you export the preview jpeg files, all those adjustments will be applied to the files. Later when processing orders, you can go back to the files to tweak them (if necessary) or leave them as is and simply change the output parameters to process high resolution files for printing. There may be some other raw processors that do this as well (quick jpeg outputs from the preview files), but unfortunately not the free stuff from Canon. You might also want to also take a look at Bibble (www.bibblelabs.com) |
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