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Re: Tiff conversion
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Re: Tiff conversion

  • Subject: Re: Tiff conversion
  • From: Clyde McQueen <email@hidden>
  • Date: Fri, 3 Aug 2001 14:55:10 -0700
On Wednesday, August 1, 2001, at 02:33 PM, Ivan Salina Fernandes wrote:

Dear friends,
I'm trying to convert a tiff image, from CMYK (4 components) to RGB (3 components). I'm using Cocoa, but I couldn't find any kind of "way" to do this. Can anybody HELP me ?

You'll have to do it yourself. Create a 2nd NSBitmapImageRep with 3 planes using the rather hairy method:

- (id)initWithBitmapDataPlanes:(unsigned char **)planes
pixelsWide:(int)width
pixelsHigh:(int)height
bitsPerSample:(int)bps
samplesPerPixel:(int)spp
hasAlpha:(BOOL)alpha
isPlanar:(BOOL)isPlanar
colorSpaceName:(NSString *)colorSpaceName
bytesPerRow:(int)rowBytes
bitsPerPixel:(int)pixelBits

Then walk the source & destination data pixel by pixel and convert CMYK to RGB using the standard conversion algorithm.

/Clyde

References: 
 >Tiff conversion (From: Ivan Salina Fernandes <email@hidden>)

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