[comp.sys.mac.programmer] Image Studio compression format

macg@alberta.UUCP (Mike MacGregor) (03/02/88)

I have an image file from a program called Image Studio.  It is 104192 bytes
long. Does anyone know what format the file might be in ?

( BTW  104192 = 52096 * 2,  52096 - 256 = 51840,  51840 = 576/8 * 720 )

Thanks in advance.

macg@alberta

herbw@midas.TEK.COM (Herb Weiner) (03/04/88)

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Image Studio uses a file format called RIFF (Raster Image File Format).  This
uses a two-dimensional compression based upon CHANGES in gray level between
adjacent (horizontally AND vertically) pixels.  In order to encourage
developers to support this format, Letraset will supply C source code to
read and write RIFF.  If you don't have the code, ask the person who supplied
the image to give you a TIFF format image instead (Image Studio can also
save in TIFF format).