jim@ljkiraly.lerc.nasa.gov (L J "Jim" Kiraly) (05/28/91)
I need to transfer some graphics as tiff files for use on a PC (unfortunately the unenlightened are still using PC's). All I get on the PC is a black rectangle or a series of bars when I try to display the transferred tiff files. I have checked that the tiff files were properly sent by sending them back to my NeXT and comparing the originals. None of the tiffs used any of the tiffutil compression schemes. I presume that the NeXT uses some different aspects of the tiff standards than is customary for PC-Windows based tiff readers (specifically I want to get them into PageMaker). Has anyone else experienced this problem? I'm not ambitious enough to dig through the tiff specifications and was hoping someone else has already solved this problem. Thanks- -- ___________________________________________________________________________ Jim Kiraly - jim@ljkiraly.lerc.nasa.gov - NASA Lewis Research Center ---------------------------------------------------------------------------
aozer@next.com (Ali Ozer) (05/28/91)
In article <1991May27.172417.17273@eagle.lerc.nasa.gov> L J "Jim" Kiraly writes: >I need to transfer some graphics as tiff files for use on a PC ... >All I get on the PC is a black rectangle or a series of bars when I try >to display the transferred tiff files. ... One likely problem is transparency; TIFF images created by NeXTstep can include transparency, which TIFF readers on other machines might not understand or interpret correctly. To remove transparency, you can use Icon and save the images with the "No Alpha" option. Other possible problems include: - Images are 2 or 4 bits (per sample) deep. (If you created the TIFFs on a monochrome NeXT the former is likely.) Some simple minded TIFF readers might not understand these formats; try saving the images at 8 bits per sample (Using the "8 bit" option in Icon for monochrome images or "24 bit" option for color ones.) - Images don't have color lookup tables. NeXTstep creates TIFFs without color lookup tables; again, some TIFF readers might not be able to deal with this. You might have to find some other TIFF reader which can read the images and write them out with color lookup tables (after determining what the best palette is, of course). Good luck... Ali, Ali_Ozer@NeXT.com