A newer version of Max is available. Click here to access the latest version of this document.


Robert's Cross edge detection


The jit.robcross object implements the Robert's Cross method of edge detection. This particular edge detector uses a 2x2 convolution kernel to compute a 2-dimensional spatial gradient of an incoming matrix, brightening features with "high spatial frequency" -- a large amount of change from cell to cell -- and darkening features with less change.

Matrix Operator

matrix inputs:1, matrix outputs:1
Name IOProc Planelink Typelink Dimlink Plane Dim Type
out n/a 1 1 1 1 1 char long float32 float64

Information for Jitter Matrix Operator (MOP) messages and attributes to this object


Name Type g/s Description
thresh float Edge detection threshold (default 0.). Cell values below this threshold are set to 0.

Information for box attributes common to all objects


See Also

Name Description
jit.brass Emboss image
jit.qt.effect QuickTime Effects for Jitter matrices
jit.sobel Sobel and Prewitt gradient edge detector
Tutorial 45: Introduction to using Jitter within JavaScript Tutorial 45: Introduction to using Jitter within JavaScript