This function returns the color interpretation type of a band of a raster object.
Syntax
text ST_ColorInterp(raster raster_obj, integer band);Parameters
| Parameter | Description |
|---|---|
| raster_obj | The raster object. |
| band | The sequence number of the band, which starts from 0. |
The following table describes the values of the interp parameter that is returned.
| Value | Description |
|---|---|
| Undefined | The color interpretation type is not defined. |
| GrayIndex | The index of the associated gray value table. |
| RGBIndex | The index of the RGB color table. |
| RGBAIndex | The index of the RGBA color table. |
| RedBand | The red band in the RGB color model. |
| GreenBand | The green band in the RGB color model. |
| BlueBand | The blue band in the RGB color model. |
| AlphaBand | The alpha band in the RGBA color model. |
| HueBand | The hue band in the HSL color model. |
| SaturationBand | The saturation band in the HSL color model. |
| LightnessBand | The lightness band in the HSL color model. |
| CyanBand | The cyan band in the CMYK color model. |
| MagentaBand | The magenta band in the CMYK color model. |
| YellowBand | The yellow band in the CMYK color model. |
| BlackBand | The black band in the CMYK color model. |
| YCbCr_YBand | The Y band in the YCbCr color model. |
| YCbCr_CbBand | The Cb band in the YCbCr color model. |
| YCbCr_CrBand | The Cr band in the YCbCr color model. |
Example
select ST_ColorInterp(raster_obj,0) from raster_table where id = 1;
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RedBand