How to calculate the radiance of a pixel.

Hi all,

I have a grayscale image and I have the intensity values of all the pixels. I need help converting this pixel intensity value to the radiance of the pixel in W/m2/sr. If anyone can help me with this, I will greatly appreciate it.

Kind regards,

Vanessa

Answer 1

[Rahul Goel]

Hello Vanessa,

W/m2/sr is a function of camera sensor. It will need a known transfer function/gauge/lookup table to convert grayscale values to radiance for this particular camera sensor. Basically, a function of the camera's sensitivity for each color channel (if it's a color sensor) and then you'd have to also account for the grayscale conversion (red is ~.4, green is something close to that and blue is ~.15)

Hope this helps

Answer 2

[Image Analyst]

See https://www.google.co.uk/?gfe_rd=cr&ei=kokTWYj9FOmD3AOr4paACA&gws_rd=ssl#q=measuring+display+brightness