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Writing 32 bit images

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how can i make 32 bit image in Matlab?

Accepted Answer

Walter Roberson
Walter Roberson on 27 Apr 2011
How many color channels are you using, and how many bits do you require for each of the color channels?
Does the file have to be directly decodable by an external viewer as 32 bits, or is it sufficient that you can recover the 32 bits upon reading it in?
Your options:
  • PNG file with bitdepth of 8 (bits per channel) to encode 24 of the bits, and specify a uint8 alpha map for the remaining 8 bits
  • Sun RAS file passed an RGB image that is uint8 per channel, and a uint8 alpha map
  • TIFF with a M x N x 4 uint8 matrix passed in, which would cause TIFF to think of the file as being CMYK
  • PNG with a bitdepth of 16 (per channel) and passing a 3 channel uint16 matrix, resulting in a 48 bit per pixel image
  9 Comments
Walter Roberson
Walter Roberson on 26 May 2011
If you look above your comment, you will find something that says "Show older comments". Click on that. The code you ask for is there.

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More Answers (1)

John
John on 3 May 2011
The Tiff class was introduced in R2009b, which allows one to create TIFFs with a variety of configurations, including 32-bit floating point, 8-bit RGB with an alpha layer, and others.

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