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This site is devoted to mathematics and its applications. Created and run by Peter Saveliev.

# Intensity

For each pixel,

 Intensity of light = gray level in gray scale images.


This is essentially the analogy in image analysis of the luminance [1] in optics. It runs between 0 and 255.

For image analysis, we don't look at individual pixels anymore. The gray level within the object (see Objects in gray scale images) .

 The intensity of a dark object is the lowest level of gray within it.
The intensity of a light object is the highest level of gray within it.


For example, rectangle #1 has intensity 0 (black). The intensity of rectangle #5 is 255 (white).

For objects the intensity is computed as the average gray and displayed in the Pixcavator's output table.