This DirectShow filter is for displaying a frequency Histogram
graph of the colour channels in a video frame. It overlays the
colour channel information onto the output frame so you can see
that is happening in real time.
At the moment this filter will only accept RGB24 colour input,
if you try to connect anything else you will get a colour transform
filter added automatically, this could cause some problems so
for now just change the colour format to RGB24 and set up your
input source then change to YUY2 to do your capture.
The filter properties page allow you to alter the way the colours
are displayed on the output.
You can select what colour channel to analyze, or to analyze
luminosity instead, there is a graph scale as well to allow you
to amplify the vertical axis to better see fine details.