![]() ![]() I don't think so (for GIMP), but you never know. Actually the program mentioned above does this trick.ĬinePaint will convert (formerly known as FilmGIMP)ĭo you know wether there is a GIMP script that does so? Like the GRUB SPLASH script. And it's really hard to divide a bit into thirds If each band were to carry the same depth, then there would be 16/3 = 5.33333 bits per pixel per band. You probably just need something to clamp the image down to 65536 colors even if it's saved in the 24 bit format. It appears that the jpeg standard supports a bits per pixel of 2-16 although all the common software that comes to mind saves in the common 888 24bit format (although probably not when using a grayscale image). Apparently the human eye is slightly more sensitive to green then red or blue so this is most efficient. And it's really hard to divide a bit into thirds :)ġ6 bit color is usually 565, 5 bits red, 6 bits green and 5 bits blue. ![]() I'm tired of having to reduce depth to 8bit and save as 24 bit! Have fun and thanks for the tool! That'll do for me. In conclussion, jpg DOES store in 16bit, nevermind the header says another thing. And yes, I have managed with Macromedia Fireworks to reduce 24 to 16 bit depth through a large process and, of course, not under Linux. The fact is that bootsplash doesn't matter the header of the file but the real content in it and, if it finds more than 64M colors, the bootsplash simply doesn't work. It does store as 16bit although the header says 24. The format is jpg 16bits (64M) and it's for my console (bootsplash). Posted: Thu 12:25 pm Post subject: Re: Convert images from 24 to 16 bits You can either choose 24 bit color (8 bits per band) or 8 bit color (which contains a lookup table for the colors). ![]() So to answer the original question - you can't practically do what you want to do. At least for me, the -depth 16 output was larger than the other two (which were the same size). If you don't believe me, try converting the image without the -depth argument, with "-depth 16" and also with "-depth 8". So nmr_spectrometer's suggestion to use "-depth 16" as an argument to convert will result in 48 bit imagery (16 * 3) instead of 16 bit. And it's really hard to divide a bit into thirds :) While it can be done for image displays (see here), it's not really all that practical to do for a file format, especially when a good compression scheme will probably do better.Īlso note that ImageMagick specifies depth in bits per pixel per band. ![]() In a standard color image, there are 3 bands - red, green, and blue. I agree with jbrown - I don't know of any format that lets you store color images at 16 bits per pixel. But I'm still fairly new to it, so anyone who knows better, feel free to correct me. I've recently done some work relating to this field, so hopefully what I'm about to say is correct. You are probably better sticking to pngs and reducing them at load time. What file format are you proposing to save them in? I don't know of any that support 16bit colour. Posted: Thu 12:45 am Post subject: Re: Convert images from 24 to 16 bits You can definitely do this in the GIMP too but if you want to do a hundred photos or something it's easier to smash out a script running convert (yeah, convert isn't really a descriptive command name) than to do it a hundred times in the GIMP (although I bet gimp has some sort of scripting ability). Man ImageMagick is probably lots of help too. If you know of another app, say which and how if it's too complex.Īn awesome command-line graphics manipulation utility is ImageMagick (emerge imagemagick) to do the conversion after you've installed the program is:Ĭonvert -depth 16 my_24_bit_file.tiff my_16_bit_file.tiff If the answer is GIMP, very well, then explain HOW if using GIMP. I need to convert images of 24 bits to 16 bits. Posted: Wed 9:49 pm Post subject: Convert images from 24 to 16 bits Gentoo Forums :: View topic - Convert images from 24 to 16 bits ![]()
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