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Image Processing examples for 2.0

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This commit is contained in:
Casey Reas
2011-09-16 06:08:57 +00:00
parent 472fd13b2f
commit dabdffc1dd
7 changed files with 36 additions and 32 deletions
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11
java/examples/Topics/Image Processing/Convolution/Convolution.pde
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@@ -14,9 +14,9 @@
PImage img;
int w = 120;
// It's possible to convolve the image with
// many different matrices to produce different effects.
// This is a high-pass filter; it accentuates the edges.
// It's possible to convolve the image with many different
// matrices to produce different effects. This is a high-pass
// filter; it accentuates the edges.
float[][] matrix = { { -1, -1, -1 },
{ -1, 9, -1 },
{ -1, -1, -1 } };
@@ -30,14 +30,15 @@ void draw() {
// We're only going to process a portion of the image
// so let's set the whole image as the background first
image(img, 0, 0);
// Where is the small rectangle we will process
// Calculate the small rectangle we will process
int xstart = constrain(mouseX - w/2, 0, img.width);
int ystart = constrain(mouseY - w/2, 0, img.height);
int xend = constrain(mouseX + w/2, 0, img.width);
int yend = constrain(mouseY + w/2, 0, img.height);
int matrixsize = 3;
loadPixels();
// Begin our loop for every pixel
// Begin our loop for every pixel in the smaller image
for (int x = xstart; x < xend; x++) {
for (int y = ystart; y < yend; y++ ) {
color c = convolution(x, y, matrix, matrixsize, img);