Taking a heap dump from console when Java VisualVM and JMX is not available to us. We will use following tools jmap jps ps Dumping heap requires two steps 1) Obtaining target process id 2) Dumping heap for given pid First we need to obtain the target process id we would like to dump, here I …
Taking heap dump of java process on linux and windows Read More »
This is mainly as a reference /** * Get Pixel value at given point */ l_uint32 pixAtGet(PIX* pix, int_t x, int_t y) { l_int32 wpl = pixGetWpl(pix); l_uint32* data = pixGetData(pix); l_uint32* line = data + y * wpl; l_uint32 value = GET_DATA_BYTE(line, x); return value; } /** * Get Pixel value at given …
This method uses strtok to tokeninze our string given a specific delimeter, results of that are put into supplied vector. There are few other ways we can do this but this one is straight forward. #include <iostream> #include <string> #include <string.h> #include <memory> #include <stdlib.h> #include <stdio.h> #include <list> #include <vector> using namespace …
So I been offline for a while, did not update my blog or do anything else. But I am back now. In up coming days I will post what have happen since begging of the year.
struct Point { Point(int_t _x, int_t _y) : x(_x), y (_y) { } int_t x; int_t y; }; typedef std::list<Point*> points_t; double euclideanDistance(const Point& lhs,const Point& rhs) { double p1 = std::pow((float)(rhs.x – lhs.x), 2); double p2 = std::pow((float)(rhs.y – lhs.y), 2); double vd = std::sqrt(p1 + p2); …
Just some notes on compiling WebKit on windows with visual studio. Issues : C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\xrefwrap(431): error C2064: term does not evaluate to a function taking 1 arguments (..\..\win\WebCoreSupport\WebFrameLoaderClient.cpp) 25> C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\functional(239) : see reference to function template instantiation ‘_Ret std::_Callable_obj::_ApplyX(_V0_t &&)’ being compiled 25> with 25> [ …
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Calculate centroid of 2D non crossing polygon,To accommodate that points are correct using Gift wrapping algorithm(Finding Convex Hull) Test case import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotNull; import java.awt.Point; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import org.junit.Test; public class MathUtilTest { @Test public void computeCentroidWithHull() { Point p1 = new Point(1, 1); Point p2 = new …
Find Convex hull of given points using Gift wrapping algorithm This is implementation of Grift wrapping algorithm for finding convex hull. private static final Integer ZERO = new Integer(0); /** * Find Convex hull of given points * * @ref http://en.wikipedia.org/wiki/Gift_wrapping_algorithm * @param vertices * @return */ private static List<Point> findConvexHull(final List<Point> …
Find Convex hull of given points using Gift wrapping algorithm Read More »
This snippet allows us to convert Leptonica PIX data into Java BufferedImage, in my case the pix->data could be compressed using zlib so I am decompressing before recreating image. We are assuming here that this is bi-tonal image(1 bpp) File used in example : Pix data compressed used ZLib Pix data decompressed Image represented by …
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This snippet allows us to convert Leptonica PIX data into Java BufferedImage, in my case the pix->data could be compressed using zlib so I am decompressing before recreating image. We are assuming here that this is bi-tonal image(1 bpp) Sample Usage BufferedImage image = LeptonicaUtil.convert(zlibData, width, height, 1); ImageIO.write(image, "png", new File("C:/temp/test.png")); BufferedImage image = …
Convert Leptonica PIX data to Java BufferedImage Read More »
