Need help on possible memory leak.

[balachandarsv]

I am trying to use lept4j for contour detection. Attaching the code and image used here.
In the code there is a constant increase in memory when reading boxaGetBox and pixaGetPix, if i comment those two lines, the memory usage is steady. Am I missing something?

Using latest lept4j jar.

Image:
This is an screenshot image.

Code:

import java.io.FileNotFoundException;

import com.sun.jna.ptr.PointerByReference;

import net.sourceforge.lept4j.Box;
import net.sourceforge.lept4j.Boxa;
import net.sourceforge.lept4j.Leptonica1;
import net.sourceforge.lept4j.Pix;
import net.sourceforge.lept4j.Pixa;
import net.sourceforge.lept4j.util.LeptUtils;

public class Mulit {

	public static void test(Pix image) {

		Pix adapativePix = Leptonica1.pixConvertTo1Adaptive(image);

		Pix pix2 = Leptonica1.pixAutoPhotoinvert(adapativePix, 127, null, null);

		PointerByReference pbr = new PointerByReference();

		Boxa connectedComponents = Leptonica1.pixConnComp(pix2, pbr, 8);

		Pixa ccs = new Pixa(pbr.getValue());
		for (int i = 0; i < connectedComponents.n; i++) {
			Pix cPix = Leptonica1.pixaGetPix(ccs, i, Leptonica1.L_COPY);
			Box cBox = Leptonica1.boxaGetBox(connectedComponents, i, Leptonica1.L_COPY);
			// Do some operations here
			LeptUtils.dispose(cPix);
			LeptUtils.dispose(cBox);

		}

		LeptUtils.dispose(ccs);
		LeptUtils.dispose(connectedComponents);
		LeptUtils.dispose(pix2);
		LeptUtils.dispose(adapativePix);
		Leptonica1.pixDestroy(pbr);

	}

	public static void main(String[] args) throws FileNotFoundException, Exception {
		while (true) {

			String filename = "/tmp/sample-text.png";

			Pix load = Leptonica1.pixRead(filename);
			test(load);
			LeptUtils.dispose(load);

		}
	}

}

[balachandarsv]

@nguyenq Can you please look at this and let me where the issue is when you find time? Thank you.

[nguyenq]

@balachandarsv pbr is of PointerByReference type, so your current method to dispose or destroy it will not work. I recall Leptonica has a function called lept_free that may work for you.

[balachandarsv]

Thank you. Let me check that once.