|AWARE [SYSTEMS]||Imaging expertise for the Delphi developer|
|TIFF and LibTiff Mailing List Archive|
LibTiff Mailing List
1999.07.16 20:04 "Re: RGB Gradient Code, adapted from Andreas Neumann", by Phillip Crews
Eric, I believe Photoshop is adjusting sample levels for color correction. Try turning off all color conrrection and conversion during import. If you wish, I'll be glad to generate a histogram using my program (ThumbsPlus), with a guarantee that no pixels are adjusted, and email it to you; just send me your gradient image. Kind regards, Phillip Crews Cerious Software Inc. http://www.thumbsplus.com At 01:39 PM 7/16/99 , Eric B. Middlecamp wrote: >Ok, here goes.. I am running on a Power Mac 8100/100 under MacOS 8.1, I am >compiling under Codewarrior IDE 2.1, displaying the images in Adobe Photoshop >5.0, producing the histogram in Photoshop with full data sampling (histogram >not >from cache), and I am using a Mac-compiled version of the old libtiff >"tiff-v3.4beta028," although I have compared the code for libtiff version >"tiff-v3.4beta037" and not found any major differences. > >As an update, I just ran a modified version of "tiffinfo," it verified that the >image I have matches what Niles got when he ran it; the problem must be related >to the image readers, namely Photoshop. I am also writing some code which reads >TIFFs, though, and I have gotten some strange results there as well. Is it >possible that I am using a valid, but uncommon/problemmatic, set of tags?