[Radiance-general] getting pixel value at x,y

[Lars O. Grobe]

Hi Jack!

> Just to be clear, this routine calculates the average of the values in
> the crop box. It will output a numeric value.

Yes, I had just misunderstood the -x -y parameters of pcompos. The
pvalue-part was clear to me.

>      1. put a frame around selected crop areas in the image - perhaps
>         this would be easier to do with something like ImageMagick?

I guess that this is what I will do. While I still think that it could
be done using only pcompos, imagemagick is easier here. I wanted to draw
markers such as rectangular frames around known areas, e.g. mark the
area in an image that has been read out by pvalue.

Thank you! Lars.