| Methods Summary |
|---|
| private void | createHistogramFrame(android.filterfw.core.FilterContext context, int width, int height, int[] data)
int histDims = 255 * 3 + 1;
int[] histArray = new int[histDims];
float border_thickness_ratio = 0.05f;
int y_border_thickness = (int) (height * border_thickness_ratio);
int x_border_thickness = (int) (width * border_thickness_ratio);
int pixels = (width - 2 * x_border_thickness) * (height - 2 * y_border_thickness);
float count = 0f;
for (int y = y_border_thickness; y < height - y_border_thickness; ++y) {
for (int x = x_border_thickness; x < width - x_border_thickness; ++x) {
int index = y * width + x;
int energy = (data[index] & 0xFF) + ((data[index] >> 8) & 0xFF) +
((data[index] >> 16) & 0xFF);
histArray[energy] ++;
}
}
for (int i = 1; i < histDims; i++) {
histArray[i] += histArray[i-1];
}
for (int i = 0; i < histDims; i++) {
long temp = (256 * 256 - 1l) * histArray[i] / pixels;
histArray[i] = (int) temp;
}
FrameFormat shaderHistFormat = ImageFormat.create(histDims, 1,
ImageFormat.COLORSPACE_RGBA,
FrameFormat.TARGET_GPU);
if (mHistFrame != null)
mHistFrame.release();
mHistFrame = context.getFrameManager().newFrame(shaderHistFormat);
mHistFrame.setInts(histArray);
|
| public void | fieldPortValueUpdated(java.lang.String name, android.filterfw.core.FilterContext context)
if (mShaderProgram != null) {
mShaderProgram.setHostValue("scale", mScale);
}
|
| public android.filterfw.core.FrameFormat | getOutputFormat(java.lang.String portName, android.filterfw.core.FrameFormat inputFormat)
return inputFormat;
|
| private void | initParameters()
mShaderProgram.setHostValue("shift_scale", 1.0f / 256f);
mShaderProgram.setHostValue("hist_offset", 0.5f / 766f);
mShaderProgram.setHostValue("hist_scale", 765f / 766f);
mShaderProgram.setHostValue("density_offset", 0.5f / 1024f);
mShaderProgram.setHostValue("density_scale", 1023f / 1024f);
mShaderProgram.setHostValue("scale", mScale);
|
| public void | initProgram(android.filterfw.core.FilterContext context, int target)
switch (target) {
case FrameFormat.TARGET_GPU:
ShaderProgram shaderProgram = new ShaderProgram(context, mAutoFixShader);
shaderProgram.setMaximumTileSize(mTileSize);
mShaderProgram = shaderProgram;
break;
default:
throw new RuntimeException("Filter Sharpen does not support frames of " +
"target " + target + "!");
}
mTarget = target;
|
| protected void | prepare(android.filterfw.core.FilterContext context)
int densityDim = 1024;
int histDim = 255 * 3 + 1;
long precision = (256l * 256l - 1l);
int[] densityTable = new int[densityDim];
for (int i = 0; i < densityDim; ++i) {
long temp = normal_cdf[i] * precision / histDim;
densityTable[i] = (int) temp;
}
FrameFormat densityFormat = ImageFormat.create(densityDim, 1,
ImageFormat.COLORSPACE_RGBA,
FrameFormat.TARGET_GPU);
mDensityFrame = context.getFrameManager().newFrame(densityFormat);
mDensityFrame.setInts(densityTable);
|
| public void | process(android.filterfw.core.FilterContext context)
// Get input frame
Frame input = pullInput("image");
FrameFormat inputFormat = input.getFormat();
// Create program if not created already
if (mShaderProgram == null || inputFormat.getTarget() != mTarget) {
initProgram(context, inputFormat.getTarget());
initParameters();
}
// Check if the frame size has changed
if (inputFormat.getWidth() != mWidth || inputFormat.getHeight() != mHeight) {
mWidth = inputFormat.getWidth();
mHeight = inputFormat.getHeight();
createHistogramFrame(context, mWidth, mHeight, input.getInts());
}
// Create output frame
Frame output = context.getFrameManager().newFrame(inputFormat);
// Process
Frame[] inputs = {input, mHistFrame, mDensityFrame};
mShaderProgram.process(inputs, output);
// Push output
pushOutput("image", output);
// Release pushed frame
output.release();
|
| public void | setupPorts()
addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA));
addOutputBasedOnInput("image", "image");
|
| public void | tearDown(android.filterfw.core.FilterContext context)
if (mDensityFrame != null) {
mDensityFrame.release();
mDensityFrame = null;
}
if (mHistFrame != null) {
mHistFrame.release();
mHistFrame = null;
}
|
