Ullrich Koethe wrote:
Lubomir Bourdev wrote:
Three things come to mind: - many more type conversions; e.g. int8 => uint16; RGB <=> LAB etc. - adaptors for the subsampled image view - support for multi-dimensional images (e.g. volume data, image sequences)
Another important point are RGBA operations. In most cases, the alpha channel is to be treated differently from the other channels, so you can't just use component-wise operators as for the other color models.
Yes! This was the point I was trying to make with Lubomir off list. I was stressing that with HSL/HSB too, you don't want to do component-wise operations. Yes, I'd like to see more color operations.
VIGRA doesn't have an explicit RGBA type (TinyVector<T, 4> can be used instead), because so far no-one came up with a convincing proposal for these operations. But without them, RGBA is pretty useless.
I don't think any of this is a show stopper, but it means considerable work.
Agreed. Hmmm... TinyVector<T, 4>... I think VIGRA should use Fusion for that instead ;-) Regards, -- Joel de Guzman http://www.boost-consulting.com http://spirit.sf.net