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------- Additional comments from [EMAIL PROTECTED] Wed Mar 26 18:47:34 +0000 2008 ------- Can confirm this with OOo 2.4-dev on Win2k. OOo Draw seems to export the jpg-image as RGB/YCbCr triplets, instead of saving just the luminance component (Y). 1.) The space savings from getting rid of the near-empty chroma channels (Cb and Cr) won't be large; but the decoding time for a grayscale JPEG is substantially less than that for a color JPEG. 2.) The bigger problem stems from the fact that the resulting "grayscale" image is actually a 24-bit RGB image, so editing it in another application results in RGB-editing. This may not pose a serious problem if one draws a red line on the image, as the user will notice that something went wrong, but it may be a problem when applying filters and various transforms. TRUE colours may be produced in this latter situation, yet the unsuspecting user may easily miss this fact. As the 2 chroma components are 0 (Cb = Cr = 0) in a grayscale image, the luminance (Y) is basically identical with the R/G/B values (when scaled to 255; Y = R = G = B). This should be relatively easy to fix. [The chroma components are scaled to 255 for true 24-bit RGB images, so they would become 128 rather than 0.] --------------------------------------------------------------------- Please do not reply to this automatically generated notification from Issue Tracker. Please log onto the website and enter your comments. http://qa.openoffice.org/issue_handling/project_issues.html#notification --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
