Hello,
I am using a ConvolveOp to do edge detection.
The results are fine as far as they go, but some edges are not found.
This is what happens: my source image looks something like concentric
circles: the outer-most ring is yellow, middle ring is orange, center is
red. Outside the yellow ring is just transparent.
My dest image is just a yellow line that traces the outer-most yellow ring.
I would have expected that inside the yellow line there would have been an
orange line and inside that a red line -- looking sort of like isobars on a
weather map. But I'm just getting the outer-most edge.
Is there some way to 'force' it to detect the inner edges as well?
Thank you,
Ted Hill
----------------- my code snippet below --------------------
float [ ] edgeKernelArray =
{
-1.0f, -1.0f, -1.0f,
-1.0f, 8.0f, -1.0f,
-1.0f, -1.0f, -1.0f
};
rgbImage = new BufferedImage(width, height,
BufferedImage.TYPE_INT_ARGB);
edgeImage = new BufferedImage(width, height,
BufferedImage.TYPE_INT_ARGB);
WritableRaster wr = rgbImage.getRaster( );
wr.setDataElements(0, 0, width, height, imageData);
Kernel edgeKernel = new Kernel(3, 3, edgeKernelArray);
ConvolveOp edgeOp = new ConvolveOp(edgeKernel);
edgeOp.filter(rgbImage, edgeImage);
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