@Override
@SuppressWarnings("unchecked")
public void perform(InputSocket<?>[] inputs, OutputSocket<?>[] outputs, Optional<?> data) {
final Mat input = ((InputSocket<Mat>) inputs[0]).getValue().get();
final Mat tmp = ((Optional<Mat>) data).get();
final boolean externalOnly = ((InputSocket<Boolean>) inputs[1]).getValue().get();
if (input.empty()) {
return;
}
// findContours modifies its input, so we pass it a temporary copy of the input image
input.copyTo(tmp);
// OpenCV has a few different things it can return from findContours, but for now we only use
// EXTERNAL and LIST.
// The other ones involve hierarchies of contours, which might be useful in some situations, but
// probably only
// when processing the contours manually in code (so, not in a graphical pipeline).
MatVector contours = new MatVector();
findContours(
tmp, contours, externalOnly ? CV_RETR_EXTERNAL : CV_RETR_LIST, CV_CHAIN_APPROX_TC89_KCOS);
final OutputSocket<ContoursReport> contoursSocket = (OutputSocket<ContoursReport>) outputs[0];
contoursSocket.setValue(new ContoursReport(contours, input.rows(), input.cols()));
}
@Override
public void perform(InputSocket<?>[] inputs, OutputSocket<?>[] outputs, Optional<?> data) {
final Mat[] dataArray =
(Mat[]) data.orElseThrow(() -> new IllegalStateException("Data was not provided"));
final Mat input = ((InputSocket<Mat>) inputs[0]).getValue().get();
final List<Number> channel1 = ((InputSocket<List<Number>>) inputs[1]).getValue().get();
final List<Number> channel2 = ((InputSocket<List<Number>>) inputs[2]).getValue().get();
final List<Number> channel3 = ((InputSocket<List<Number>>) inputs[3]).getValue().get();
final OutputSocket<Mat> outputSocket = (OutputSocket<Mat>) outputs[0];
final Mat output = outputSocket.getValue().get();
// Intentionally 1, 3, 2. This maps to the HLS open cv expects
final Scalar lowScalar =
new Scalar(
channel1.get(0).doubleValue(),
channel3.get(0).doubleValue(),
channel2.get(0).doubleValue(),
0);
final Scalar highScalar =
new Scalar(
channel1.get(1).doubleValue(),
channel3.get(1).doubleValue(),
channel2.get(1).doubleValue(),
0);
final Mat low = reallocateMatIfInputSizeOrWidthChanged(dataArray, 0, lowScalar, input);
final Mat high = reallocateMatIfInputSizeOrWidthChanged(dataArray, 1, highScalar, input);
final Mat hls = dataArray[2];
try {
cvtColor(input, hls, COLOR_BGR2HLS);
inRange(hls, low, high, output);
outputSocket.setValue(output);
} catch (RuntimeException e) {
logger.log(Level.WARNING, e.getMessage(), e);
}
}