Clown.

(cln1): The original image.
(cln1can1): Result of applying the Canny edge detector to cln1 (threshold: 255, 1; Gaussian : 1.0.
(cln1can2): Result of applying the Canny edge detector to cln1 (threshold: 255, 220; Gaussian : 1.0.
(cln1can3): Result of applying the Canny edge detector to cln1 (threshold: 128, 1; Gaussian : 1.0.
(cln1can4): Result of applying the Canny edge detector to cln1 (threshold: 128, 1; Gaussian : 2.0.
(cln1fur1): The magnitude image resulting from Fourier Transforming cln1.
(cln1fur2): The logarithm of the magnitude image resulting from Fourier Transforming cln1.
(cln1fur3): The phase image resulting from Fourier Transforming cln1.
(cln1fil1): The inverse Fourier Transform of cln1fur1.
(cln1noi1): Result of adding Gaussian noise to cln1, mean = 0, standard deviation = 8.
(cln1low1): Result of lowpass filtering cln1noi1 with an ideal filter and a cut-off frequency of .
(cln1low2): Result of lowpass filtering cln1noi1 with an ideal filter and a cut-off frequency of 0.5.
(cln1low3): Result of lowpass filtering cln1noi1 with a Butterworth filter and a cut-off frequency of .
(cln1low4): Result of lowpass filtering cln1noi1 with a Butterworth filter and a cut-off frequency of 0.5.
(cln1hig1): Result of highpass filtering cln1 with a Butterworth filter and a cut-off frequency of 0.5.
(cln1hig2): The absolute value of the filtered spatial domain image cln1hig1.
(cln1log1): Result of applying the Laplacian of Gaussian filter, mean = 0, = 1.0, to cln1.
(cln1log2): Result of applying the Laplacian of Gaussian filter, mean = 0, = 2.0, to cln1.
(cln1log3): Result of applying the Laplacian of Gaussian filter, mean = 0, = 3.0, to cln1.
(cln1zer1): Result of applying zero crossing detection to cln1log1.
(cln1zer2): Result of applying zero crossing detection to cln1log1, where shallow crossings are ignored.
(cln1zer3): Result of applying zero crossing detection to cln1log2.
(cln1zer4): Result of applying zero crossing detection to cln1log3.
(cln1rob1): Result of applying the Roberts Cross edge detector to cln1.
(cln1rob2): Result of thresholding cln1rob1 at a pixel value of 80.
(cln1sob1): Result of applying the Sobel edge detector to cln1.
(cln1sob2): Result of histogram equalizing cln1sob1.
(cln1sob3): Result of thresholding cln1sob2 at a pixel value of 200.
(cln1thn1): Result of thinning cln1sob1.
(cln1cmp1): Result of applying the Prewitt compass edge detector to cln1.
(cln1cmp2): The grayscale orientation images of cln1cmp1 after contrast stretching.
(cln1cmp3): The labeled 8-bit color orientation images of cln1cmp1 after contrast stretching.
(cln1cmp4): Result of histogram equalizing cln1cmp1.
(cln1trn1): Result of translating cln1 by 1 pixel in the x and y directions and then subtracting from the original.
(cln1trn2): Result of translating cln1 by 6 pixels in the x and y directions and then subtracting from the original.