and a sensor like this one
composed of 64x32 photoreceptors of different size (64 of them for each of
the 32 concentric circles).
The sensor has two peculiarities:
|The result is a space variant image whose resolution is highest in the center and decreases with eccentricity.|
|The polar representation of the sensor can be mapped into a cartesian one in the way shown here for just a part of the image.|
|The overall 64x32 matrix of pixels looks like this. This is called log-polar representation because a generic pixels P(r,theta) in the original image is mapped into a cartesian space at coordinates log(r),theta).||