Free boundary condition

Free boundary condition

In image processing, the free boundary condition is the convention used when applying a convolution kernel to a digital image in which pixel locations that lie outside the image boundaries are interpreted as having a value of zero. [https://engineering.purdue.edu/~bouman/grad-labs/lab1/pdf/lab.pdf] The question of what value to assign out-of-bounds pixels may arise, for instance, when applying a 3x3 kernel to the corner pixel in an image.


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