feColorMatrix type="saturate"

The spec says that for feColorMatrix and ' For type="saturate",
<http://www.w3.org/TR/SVG/filters.html#feColorMatrixValuesAttribute>
'values' is a single real number value (0 to 1).'

 

Opera, however seems to have come up with a very nice and intuitive
extension of the range outside those values --see

 

http://granite.sru.edu/~ddailey/svg/filter1b.svg -- FF, Chrome and Safari
don't attempt to render the last two images with my "goofy" values.

 

On the other hand, type="saturate" provides, on an intuitive, level a way of
saturating and desaturating an image (without having to rely on matrix
math).

 

Values above 1.0 should, as Opera does, oversaturate the image. Values under
0 should reflect the chroma (but not the luminance? If I see what is going
on here).

 

Maybe something little and easy to consider for 2.0? A single valued
parameter that does the work of a whole matrix seems like an improvement for
authors.

 

Regards

David