When chromaticity diagram meets a line

Hi,

I used Matlab to plot a chromaticity diagram, then I plotted a line with a function y=ax+b with known a and b.

I am just wondering for the two points p1 and p2 where the line meets the chromaticity diagram, how to get the x and y values of p1 and p2?

Answer 1

[John D'Errico]

1. Describe the diagram border as a polygon. That just means you need to get the sequence of points on the boundary, IN SEQUENCE, as a closed curve.
2. Use a tool like Doug Schwarz's intersections code, as found on the file exchange.

[Salad Box]

I found that very useful. Thank you!

Answer 2

[Image Analyst]

Try diving into the code:

>> edit plotChromaticity.m

See what you can learn from that.