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52 lines
1.3 KiB
Plaintext
52 lines
1.3 KiB
Plaintext
import gab.opencv.*;
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PImage src, dilated, eroded, both;
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OpenCV opencv;
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void setup() {
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src = loadImage("pen_sketch.jpg");
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src.resize(src.width/2, 0);
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size(src.width*2, src.height*2);
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opencv = new OpenCV(this, src);
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// Dilate and Erode both need a binary image
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// So, we'll make it gray and threshold it.
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opencv.gray();
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opencv.threshold(100);
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// We'll also invert so that erosion eats away the lines
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// and dilation expands them (rather than vice-versa)
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opencv.invert();
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// save a snapshot to use in both operations
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src = opencv.getSnapshot();
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// erode and save snapshot for display
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opencv.erode();
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eroded = opencv.getSnapshot();
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// reload un-eroded image and dilate it
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opencv.loadImage(src);
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opencv.dilate();
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// save dilated version for display
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dilated = opencv.getSnapshot();
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// now erode on top of dilated version to close holes
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opencv.erode();
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both = opencv.getSnapshot();
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noLoop();
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}
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void draw() {
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image(src, 0, 0);
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image(eroded, src.width, 0);
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image(dilated, 0, src.height);
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image(both, src.width, src.height);
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fill(0, 255, 0);
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text("original", 20, 20);
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text("erode", src.width + 20, 20);
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text("dilate", 20, src.height+20);
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text("dilate then erode\n(close holes)", src.width+20, src.height+20);
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}
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