Number of components per pixel. 0x0115 ∙ 277
IG_ISIS_TAG_SAMPLESPERPIXEL contains the number of values each pixel uses to represent its data.
Type:
IG_ISIS_TAG_TYPE_SHORT
Drivers:
All source and destination drivers.
Values:
| Value | Meaning |
| 1 | One sample per pixel. Binary, grayscale, and palette color images use this value. |
| 3 | Three samples per pixel. RGB color images use this value. Each pixel has three samples: one for red, one for green, and one for blue, regardless of how many bits are used to represent each sample. |
The default value is 1.
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_PHOTOMETRICINTERPRETATION
IG_ISIS_TAG_PLANARCONFIGURATION