This filter calculates, for each pixel of an image, whether it is ligher or darker than a threshold.
A border filter.
BorderDetection based on Laplace-Operator. Three different variants are offered:.
A canvas filter.
The Grayscale filter calculates the gray-value based on RGB.
This filter negates every color of every pixel of an image.
The Neighborhood filter takes a matrix and calculates the color current pixel based on its neighborhood.
The OnPixelBased takes a callable, and for each pixel, this callable is called with the image (\Imagine\Image\ImageInterface) and the current point (\Imagine\Image\Point).
The RelativeResize filter allows images to be resized relative to their existing dimensions.