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Conference bulova::decw_jan-89_to_nov-90

Title:DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:STAR::VATNE
Created:Mon Oct 30 1989
Last Modified:Mon Dec 31 1990
Last Successful Update:Fri Jun 06 1997
Number of topics:3726
Total number of notes:19516

3201.0. "Paint and compression" by VAXRIO::MAURICIO (Fertile Pectus) Mon Aug 13 1990 09:23

    Is it possible to produce via Paint a file with no compression?
    I'm trying to scan some files to get them to a MAC. I'm scanning
    with no compression but as soon as I manipulate the file with Paint
    the output gets compressed and the MAC doesn't like to see compressed
    images ...
    
    Thanks for the help !!
    
    Maur�cio
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3201.1DAS can help you compress the image EMASS1::MCCANNQuality is FreeMon Aug 13 1990 15:4311
	I assume you're converting to TIFF for the MAC.  If you are, you
can use DECimage services (notesfile on EDWIN::) to compress the image you
get from paint, then ship it down to the MAC.  You need to remember to tell
the DDIF-TIFF converter to leave the image compressed, or it will decompress it
for you.

	The calls used to compress an image are really quite simply - read
the image in, get its attributes, compress the image, reset the compression
attribute, and write the frame back out.

				Chuck
3201.2To compress or not to compress ...VAXRIO::MAURICIOFertile PectusTue Aug 14 1990 08:3411
    My problem is exactly the opposite !!! What I want is to have an
    UNCOMPRESSED IMAGE for the MAC. The MAC utilities (according to
    the MAC user !!) don't like to see compressed images. As far as I could
    note the DDIF to TIFF converter does NOT decompress the image for me,
    it only gives me a warning stating that the image is compressed.
    
    I suppose the DECimage services has also routines to decompress
    the images, right ?? If there is a simpler way to get PAINT to generate
    uncompressed files I'd be more than happy to hear !!!
    
    Maur�cio
3201.3adjust and convertVAXRIO::MAURICIOFertile PectusTue Aug 14 1990 14:205
    I'll try to use the IMAGE ADJUST/NOCOMPRESS command in order to
    decompress an image created by Paint and then convert it to TIF
    via CONVERT/DOCUMENT. Let's see what happens ...
    
    Maur�cio
3201.4Convert will decompressEMASS1::MCCANNQuality is FreeFri Aug 24 1990 08:595
    	When you convert from DDIF->TIFF, the converter allows the use of
    an options file.  If you specift TIFF NOCOMPRESS in the option file,
    the image will be decompressed during conversion.
    
    				Chuck