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Multispectral Images and the RGB Color Transform

By default GeoExpress sets the output colorspace to match that of the source image. Also by default, the RGB color transform (also known as the YIQ transform) is not used when creating multispectral images.

The default behavior is overridden if the input image is a multispectral image that has previously been encoded with the RGB color transform and the colorspace is still Same as Source (whether by default or by explicit setting). In this case, GeoExpress performs the RGB transform. That is, the output is a multispectral image with the YIQ color transform performed on the red, green and blue bands.

However, if in the above scenario the colorspace is changed to Multispectral, the default behavior for multispectral images prevails. In this case the output is a regular multispectral image with no color transform performed.