There are the following Image Quality tags:
- IG_ISIS_TAG_BRIGHTNESS
- IG_ISIS_TAG_CONTRAST
- IG_ISIS_TAG_DITHER_LENGTH1
- IG_ISIS_TAG_DITHER_LENGTH2
- IG_ISIS_TAG_DITHER_PATTERN1
- IG_ISIS_TAG_DITHER_PATTERN2
- IG_ISIS_TAG_DITHER_WIDTH1
- IG_ISIS_TAG_DITHER_WIDTH2
- IG_ISIS_TAG_EMPHASIS
- IG_ISIS_TAG_GAMMA
- IG_ISIS_TAG_GAMMA_LENGTHn
- IG_ISIS_TAG_GAMMA_TABLEn
- IG_ISIS_TAG_MIXEDSCAN
- IG_ISIS_TAG_OUTLINE
- IG_ISIS_TAG_RESPONSECURVE
- IG_ISIS_TAG_TRCMAP8