/**
* Basic nonparametric usage of canny edge detector. No thresholding is used.
*
* @param original input image
*/
public CCannyEdgeDetector(BufferedImage original) {
size = new Dimension(original.getWidth(), original.getHeight());
input = original.getData();
image =
new BufferedImage(
(int) size.getWidth(), (int) size.getHeight(), BufferedImage.TYPE_INT_RGB);
bands = original.getSampleModel().getNumBands();
}
/**
* Binds the BufferedImage byte-stream into video memory. BufferedImage must be in 4BYTE_ABGR.
* 4BYTE_ABGR removes endinese problems.
*/
public Texture bind(final BufferedImage _image, final InternalFormat _format) {
final GL3 gl = GLRenderer.getCanvas().getContext().getCurrentGL().getGL3();
if (gl == null) {
System.out.println("GL context doesn't exist");
return null;
}
gl.glEnable(GL.GL_TEXTURE_2D);
final int textureID = glGenTextures(gl);
gl.glBindTexture(GL3.GL_TEXTURE_2D, textureID);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_WRAP_S, GL3.GL_REPEAT);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_WRAP_T, GL3.GL_REPEAT);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_MAG_FILTER, GL3.GL_LINEAR);
gl.glTexParameteri(GL3.GL_TEXTURE_2D, GL3.GL_TEXTURE_MIN_FILTER, GL3.GL_LINEAR_MIPMAP_LINEAR);
final int width = _image.getWidth();
final int height = _image.getHeight();
final int channels = _image.getSampleModel().getNumBands();
int internalFormat = GL3.GL_RGB;
if (gl.isExtensionAvailable("GL_EXT_abgr") == true) {
switch (channels) {
case 4:
imageFormat = GL2.GL_ABGR_EXT;
break;
case 3:
imageFormat = GL3.GL_BGR;
break;
case 1:
imageFormat = GL3.GL_RED;
break;
}
} else {
switch (channels) {
case 4:
imageFormat = GL3.GL_RGBA;
break;
case 3:
imageFormat = GL3.GL_RGB;
break;
case 1:
imageFormat = GL3.GL_RED;
break;
}
}
gl.glPixelStorei(GL3.GL_UNPACK_ALIGNMENT, 1);
gl.glTexImage2D(
GL3.GL_TEXTURE_2D,
0,
getGLInternalFormat(channels, _format),
width,
height,
0,
imageFormat,
GL3.GL_UNSIGNED_BYTE,
getByteBuffer(_image));
gl.glGenerateMipmap(GL3.GL_TEXTURE_2D);
gl.glBindTexture(GL.GL_TEXTURE_2D, 0); // Reset to default texture
return new Texture(new GLImage(textureID, width, height));
}
public BufferedImage read(int imageIndex, ImageReadParam param) throws IOException {
checkIndex(imageIndex);
readHeader();
if (iis == null) throw new IllegalStateException("input is null");
BufferedImage img;
clearAbortRequest();
processImageStarted(imageIndex);
if (param == null) param = getDefaultReadParam();
sourceRegion = new Rectangle(0, 0, 0, 0);
destinationRegion = new Rectangle(0, 0, 0, 0);
computeRegions(
param, this.width, this.height, param.getDestination(), sourceRegion, destinationRegion);
scaleX = param.getSourceXSubsampling();
scaleY = param.getSourceYSubsampling();
// If the destination band is set used it
sourceBands = param.getSourceBands();
destBands = param.getDestinationBands();
seleBand = (sourceBands != null) && (destBands != null);
noTransform = destinationRegion.equals(new Rectangle(0, 0, width, height)) || seleBand;
if (!seleBand) {
sourceBands = new int[colorPlanes];
destBands = new int[colorPlanes];
for (int i = 0; i < colorPlanes; i++) destBands[i] = sourceBands[i] = i;
}
// If the destination is provided, then use it. Otherwise, create new one
bi = param.getDestination();
// Get the image data.
WritableRaster raster = null;
if (bi == null) {
if (sampleModel != null && colorModel != null) {
sampleModel =
sampleModel.createCompatibleSampleModel(
destinationRegion.width + destinationRegion.x,
destinationRegion.height + destinationRegion.y);
if (seleBand) sampleModel = sampleModel.createSubsetSampleModel(sourceBands);
raster = Raster.createWritableRaster(sampleModel, new Point(0, 0));
bi = new BufferedImage(colorModel, raster, false, null);
}
} else {
raster = bi.getWritableTile(0, 0);
sampleModel = bi.getSampleModel();
colorModel = bi.getColorModel();
noTransform &= destinationRegion.equals(raster.getBounds());
}
byte bdata[] = null; // buffer for byte data
if (sampleModel.getDataType() == DataBuffer.TYPE_BYTE)
bdata = (byte[]) ((DataBufferByte) raster.getDataBuffer()).getData();
readImage(bdata);
if (abortRequested()) processReadAborted();
else processImageComplete();
return bi;
}
