Color space of image data. 0x0106 ∙ 262

IG_ISIS_TAG_PHOTOMETRICINTERPRETATION allows you to specify or determine the color arrangement of the image data. The PixTools Toolkit used to recommend using this tag to invert binary images; however we now strongly recommend that you use IG_ISIS_TAG_INVERT instead, because it properly inverts grayscale and color images as well.

Type:

IG_ISIS_TAG_TYPE_SHORT

Drivers:

All scanner drivers.

Values:

Value	Defined Constant	Meaning
0	IG_ISIS_PHOTOMETRIC_WHITE0	0 is imaged as white, 1 is imaged as black.
1	IG_ISIS_PHOTOMETRIC_WHITE1	0 is imaged as black, 1 is imaged as white.
2	IG_ISIS_PHOTOMETRIC_RGB	RGB image
3	IG_ISIS_PHOTOMETRIC_PALETTE	Palette color image
120	IG_ISIS_PHOTOMETRIC_BGR	Same as RGB, but blue and red planes are reversed.

Tag Dependencies and Dependent Tags:

The following tags together define the color format of the image data:

IG_ISIS_TAG_SAMPLESPERPIXEL ∙ IG_ISIS_TAG_BITSPERSAMPLE ∙ IG_ISIS_TAG_PHOTOMETRICINTERPRETATION ∙ IG_ISIS_TAG_COMPRESSION ∙ IG_ISIS_TAG_PLANARCONFIGURATION

These tags relate to color format as shown in the following table:

Samples PerPixel	BitsPerSample	Photometric Interpretation	Image Type
1	1	WHITE0 or WHITE1	Binary (black/white)
1	4	WHITE0 typical WHITE1 possible	16-level gray
8		256-level gray
1	4	PALETTE	16-color palette
8		256-color palette
3	1	RGB	3-bit color
8		24-bit color

See Also

IG_ISIS_TAG_SAMPLESPERPIXEL

IG_ISIS_TAG_BITSPERSAMPLE

IG_ISIS_TAG_PLANARCONFIGURATION