This file contains the circles image. It has 256x256 pixels.
Gray levels are in the range [0, 255]. In the data file,
observations are listed as a 256x256 matrix.
Usage
circles
Arguments
Format
A matrix of 256x256 pixels.
Author
Yicheng Kang
References
Qiu, P. (2005) Image Processing and Jump Regression
Analysis. New Jersey: Wiley.