Generate grid

Generates a set points that uniformly covers the pixel grid of an image. With an iteration this tool can be used to apply an operation to sub-images.

To split an input image into fixed-size pieces, iterated grid corners can be used as an input to pixel-to-world coordinate transform followed by cropping. To apply an operation to sub-images without cropping one can connect the iterated grid corners as the frame input for many tools such as histogram.

Inputs

image

The image to cover with a grid.

gridSpacing

The horizontal and vertical spacing between points in pixel coordinates.

gridPosition

Specifies how the grid should be positioned.

Outputs

corners

The coordinates of the upper left corners of each grid cell in world coordinates in row-major order. A N-by-2 matrix. Note that due to perspective and non-linear lens distortions the points may not be uniformly spaced in world coordinates.

gridSize

A 1-by-2 integer matrix that contains the number of cells in the grid (width, height).