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Boris_The_Bold
Participant
January 17, 2013
Answered

16bit photoshop filter

  • January 17, 2013
  • 1 reply
  • 834 views

I've just started looking at developing filters for photoshop and have just looked at the Invert sample filter.

Looking at the code and experimenting a bit gives the impression that 16bit mode (RGB) only uses 15bits (0 - 32768) for the level in each channel is this correct?

This topic has been closed for replies.
Correct answer Tom Ruark

From the FAQ:

3.3.1 Why does my 16 bit plug-in only see values of 0 - 32768 and not 0 - 65535?

Photoshop uses an internal representation of 16 bit data of 0 - 32768. When acquiring, importing, reading, or writing files check or set the maxValue in the parameter record. Filters will also see this range for 16 bit data.

1 reply

Tom Ruark
Tom RuarkCorrect answer
Inspiring
January 17, 2013

From the FAQ:

3.3.1 Why does my 16 bit plug-in only see values of 0 - 32768 and not 0 - 65535?

Photoshop uses an internal representation of 16 bit data of 0 - 32768. When acquiring, importing, reading, or writing files check or set the maxValue in the parameter record. Filters will also see this range for 16 bit data.

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