 PhotoJazz User Manual  Autodesk CleanerColor Modes
Autodesk Cleaner uniformly uses 16-bit RGB (thousands of colors) for all thumbnails in its Process window,
regardless of the color mode of the source image and the current color mode of the display.
It has PhotoJazz QT do the color conversion, but does the scaling to thumbnail size itself.
Autodesk Cleaner has PhotoJazz QT convert all source windows
to 32-bit RGB+Alpha (millions of colors+),
irrespective of the color mode of the source image and the current color mode of the display.
The color modes of the source image are reported according to overall pixel depth in the source-window caption,
right after the "quality 1024", as follows:
| Source |
Caption |
| 8-bit Gray |
256 grays |
| 16-bit Gray+Alpha |
Thousands of colors |
| 16-bit Gray |
Thousands of colors |
| 32-bit Gray+Alpha |
Millions of colors+ |
| 16-bit RGB |
Thousands of colors |
| 24-bit RGB |
Millions of colors |
| 32-bit RGB+Alpha |
Millions of colors+ |
| 48-bit RGB |
- |
| 64-bit Color+Alpha |
- |
| 32-bit CMYK |
Millions of colors+ |
| 40-bit CMYK+Alpha |
- |
| 64-bit CMYK |
- |
| 80-bit CMYK+Alpha |
- |
Likewise, when processing images, Autodesk Cleaner converts all images
to 32-bit RGB+Alpha as an intermediate mode, even when going from grayscale to grayscale.
Since this intermediate mode is a superset of all color modes Autodesk Cleaner supports,
this conversion is perfect-fidelity.
PhotoJazz QT uses a quick general-purpose algorithm to convert from CMYK to RGB,
and converts duotone and other multitone images to grayscale.
Autodesk Cleaner does not support L*a*b* or multichannel images,
and cannot open images in these color modes.
Autodesk Cleaner does not support spot colors or multiple alpha channels.
These channels are ignored on input.
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