ST_ColorInterp-ApsaraDB RDS(RDS)-阿里云帮助中心

Returns the color interpretation type of a raster band.

Syntax

text ST_ColorInterp(raster raster_obj, integer band);

Parameter	Description
`raster_obj`	The raster object.
`band`	The band index, starting from 0.

Returns one of the following text values:

Value	Description
`Undefined`	The color interpretation type is not defined.
`CI_GrayIndex`	The index of the associated gray value table.
`CI_RGBIndex`	The index of the RGB color table.
`CI_RGBAIndex`	The index of the RGBA color table.
`CI_Red`	The red band in the RGB color model.
`CI_Green`	The green band in the RGB color model.
`CI_Blue`	The blue band in the RGB color model.
`CI_Alpha`	The alpha band in the RGBA color model.
`CI_Hue`	The hue band in the HSL color model.
`CI_Saturation`	The saturation band in the HSL color model.
`CI_Lightness`	The lightness band in the HSL color model.
`CI_Cyan`	The cyan band in the CMYK color model.
`CI_Magenta`	The magenta band in the CMYK color model.
`CI_Yellow`	The yellow band in the CMYK color model.
`CI_Black`	The black band in the CMYK color model.
`CI_YCBCR_Y`	The Y band in the YCbCr color model.
`CI_YCBCR_Cb`	The Cb band in the YCbCr color model.
`CI_YCBCR_Cr`	The Cr band in the YCbCr color model.

select ST_ColorInterp(raster_obj,0) from raster_table where id = 1;
 st_colorinterp
----------------
 CI_YCBCR_Y
(1 row)