Block Category: Operations
Input Image Requirements: RGB or gray scale
Description: The Pyramid block performs up size or down size for the image input. An image pyramid is a collection of images, all arising from the single original image. During the pyramid operation, the smoothness of the image is increased and the resolution is decreased.
Expand: Specifies that the image is initially up sampled by injecting even 0 rows and columns, convolving the result, and then blurring the image.
Reduce: Specifies that the image is initially blurred, then down-samples it by rejecting even rows and columns.
In this example, the pyramid algorithm — both expansion and reduction — is applied to an image of a set of coins.
