Re: TIFF compression

From: Severian (severian_at_chlamydia-is-not-a-flower.com)
Date: 06/08/04

  • Next message: Severian: "Re: GDI+ jpeg compression" 
    Date: Tue, 08 Jun 2004 14:58:37 GMT

    On Tue, 8 Jun 2004 14:19:57 +0530, "vipin" <vipin@nospam.com> wrote:

    >Hello,
    > Whats the diference between "packbits" compression and "RLE"
    >compression for TIFF available in GDI+? Are they the same?
    >
    >I vaguely read packbits uses RLE encoding, though I am not sure whether the
    >RLE scheme deployed in packbits is the same as the one used by the
    >RLEencoding scheme by the tiff encoder in GDI+. Can someone clarify?

    PackBits is an RLE compression method which works with any color
    depth. CCITT RLE is for 1-bit images only.

    Also, zip-compressed TIFFs (deflate) are relatively common and any
    decent reader will handle them.

    There are several "flavors" of JPEG-compressed TIFFs; most readers
    only handle the most recent format, described not by the TIFF 6.0
    spec, but by a more recent technical note which fixed problems with
    the original spec that allowed for much ambiguity in using JPEG
    compression. 

    -- 
Sev
  • Next message: Severian: "Re: GDI+ jpeg compression"

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