Oscillogram

Maybe I was not clear with my first post. Second try… If I draw an arbitrary straight line on a PS image, I need to get a plot of the brightness values of all the points alongside this line. .

"Andre De Clercq" wrote in message

I would like to make an oscillogram ( e.g. brightness level as a function of position on a line in the picture). Can anybody help? Thanks for any advise.

"Andre De Clercq" wrote in message

Maybe I was not clear with my first post. Second try… If I draw an arbitrary straight line on a PS image, I need to get a plot of the brightness values of all the points alongside this line. .
"Andre De Clercq" wrote in message

I would like to make an oscillogram ( e.g. brightness level as a function of position on a line in the picture). Can anybody help? Thanks for any advise.

Rotate the image until the line is horizontal, and use the marquee tool to copy the pixels to a new image. Save that image and use it as a displacement map on a 256 square image consisting of a centered horizontal line.

This principle is used for the profile plotter action:
http://www.curvemeister.com/downloads/profileplotter/index.h tm —

Mike Russell
www.curvemeister.com

Thanks Mike. The plot seems to work, but shows only very faint (almost invisible) black points on the white 256×256 image. Am I still missing something?

"Mike Russell" wrote in message

"Andre De Clercq" wrote in message

Maybe I was not clear with my first post. Second try… If I draw an arbitrary straight line on a PS image, I need to get a plot of the brightness values of all the points alongside this line. .
"Andre De Clercq" wrote in message

I would like to make an oscillogram ( e.g. brightness level as a function of position on a line in the picture). Can anybody help? Thanks for any advise.

Rotate the image until the line is horizontal, and use the marquee tool to copy the pixels to a new image. Save that image and use it as a displacement map on a 256 square image consisting of a centered horizontal line.

This principle is used for the profile plotter action:
http://www.curvemeister.com/downloads/profileplotter/index.h tm —

Mike Russell
www.curvemeister.com