4 different methods to convert colour images to B&W,
with user option of histogram stretch.
|Option 1 - Converts image's average RGB to Channel Mixer values.|
|Option 2 - Channel Mixer method with default luminance settings.|
|Option 3 - Standard desaturation method (non-adjustable).|
|Option 4 - Greyscale method, with 16 million color depth.|
|Option 5 - Creates 4 image contact sheet to compare methods.|
but can display significant differences with certain colours.
Use the contact sheet to decide which method best suits your image,
particularly where there is a dominant colour.