Intensity thresholding-based image modification for computer vision

A computer vision method performed by a computing system, the method comprising:

• receiving an image;
• identifying a light intensity value for each pixel of a set of pixels of the image;
• defining a light intensity band formed by an upper light intensity threshold and a lower light intensity threshold based on a light intensity histogram of the light intensity values of the set of pixels, wherein the upper light intensity threshold is defined by a first offset from a mode of the light intensity values of the set of pixels within the light intensity histogram, progressing in a direction of increasing light intensity within the light intensity histogram;
• for each pixel of the set of pixels, identifying whether the light intensity value of that pixel is within the light intensity band or outside of the light intensity band;
• and
• generating a modified image by increasing a light intensity contrast between a first subset of pixels identified as having light intensity values within the light intensity band and a second subset of pixels identified as having light intensity values outside of the light intensity band.

A computer vision system, comprising:

• a computing system of one or more computing devices programmed with instructions executable by the computing system to:
• receive an image;
• identify a light intensity value for each pixel of a set of pixels of the image;
• generate a light intensity histogram of the light intensity values of the set of pixels of the image;
• define a light intensity band formed by an upper light intensity threshold and a lower light intensity threshold based on the light intensity histogram;
• wherein the lower light intensity threshold is defined as a light intensity value at which a rate of change of light intensity within the light intensity histogram decreases to a target rate of change, progressing in a direction of increasing light intensity from a first localized maximum that exceeds a first threshold pixel quantity within the light intensity histogram;
• wherein the upper light intensity threshold is defined by an offset of a predefined quantity of pixels or a predefined light intensity from the lower light intensity threshold or the first localized maximum;
• for each pixel of the set of pixels, identify whether the light intensity value of that pixel is within the light intensity band or outside of the light intensity band;
• and
• generate a modified image by increasing a light intensity contrast between a first subset of pixels identified as having light intensity values within the light intensity band and a second subset of pixels identified as having light intensity values outside of the light intensity band.