qv 4.2 is released


This release improves handling of data with more than 4 channels, data with alpha channels, and data containing color data in the GRAY or SRGB/GRAY color spaces. Furthermore, operations on color channels (e.g. range selection, dynamic range reduction, color mapping) now work on perceptually linear lightness (via the CIELUV color space) instead of the luminance channel of CIEXYZ.
An update is recommended.