Color Edge Detection Examples

CS 223B Project: Color Edge Detection Examples

We executed imgCED and imgCanny on several images. The results are below.

Examples

There are five sets of examples. Each set contains six different images. The first two are the ppm and pgm (created from the ppm) of the original image. The second two are the PGM and PBM images created by executing imgCED on the original image (before and after the edge synthesis step). The final two are the PGM and PBM resulting from running imgCanny on the original image. The last link, .csh, is the script used to produce the above images.

In addition to the original pnm images, jpg's and gif's were created for ease of viewing.

The prague image was taken with a film-based camera, scanned, saved as a tiff, converted to jpeg, then converted to ppm. It is thus pre-smoothed because of the jpeg conversion.
Squares was automatically generated and designed to have a constant grey-scale intensity. The c file used to generate squares is also linked below.
Lena was a tiff procured from an image database on the web.
Fruit and blocks were supplied by Andreas Koschan of Technische Universität Berlin and were used in his color edge detection algorithm tests.

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