bufferedimage

问题 I'm new to Java graphics (computer graphics in general) and Stack Overflow, so please help me out and help me phrase my problem better. At the moment, I'm trying to display a BufferedImage alongside the original image in a Java GUI. This is my code: Image oriImage = robot.getQwerkController().getVideoStreamService().getFrame(); //load the original image Graphics2D hi = bufferedImage.createGraphics(); hi.drawImage(oriImage, 0,0, null); //draw the original image into the BufferedImage hi

问题 I would like to draw scaled objects containing raster as well as vector data. Currently, I am drawing into a scaled Graphics2D object protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); //Get transformation, apply scale and shifts at = g2d.getTransform(); at.translate(x, y); at.scale(zoom, zoom); //Transform Graphics2D object g2d.setTransform(at); //Draw buffered image into the transformed object g2d.drawImage(img, 0, 0, this); //Draw

问题 I want to convert a color image to grayscale.First I getting the data of color image and change this data but when I want to create a gary image from this data I have a error like this... getData() maethod: public double[] getData(BufferedImage a){ double[] data2=new double[h*w]; int red=0,green=0,blue=0; int counter=0; for(int w1=0;w1<w;w1++){ for(int h1=0;h1<h;h1++){ int rgb=a.getRGB(w1,h1); red=(rgb)>> 16; green=(rgb)>>8; blue=(rgb); data2[counter]=(red+green+blue)/3; counter++; } } return

问题 On the first time through, I insert BufferedImage s from a list onto my JPanel from my extended class: @Override protected void paintComponent(Graphics g){ super.paintComponent(g); if (controlWhichImage == 1){ for (BufferedImage eachImage : docList){ g.drawImage(eachImage, 0,inty,imageWidth,imageHeight,null); intx += eachImage.getWidth(); inty += eachImage.getHeight() * zoomAdd; } if (intx >= this.getWidth() || inty >= this.getHeight()){ inty = 0; } The next time I want to copy the contents

问题 I have written one application for image processing in Java. I have processed the image which is the buffered image and now I want to return the byte[] for that processed image that is I should get the byte array of binarized image. Here is my code: public static byte[][] binarizeImage(BufferedImage bfImage){ int red; int newPixel; int h ; int w ; int threshold = otsuTreshold(bfImage); // this function returns the threshold value 199 BufferedImage binarized = new BufferedImage(bfImage

问题 I know how to get a BufferedImage from JComponent, but how to get a BufferedImage from a Component in java ? The emphasis here is an object of the "Component" type rather than JComponent. I tried the following method, but it return an all black image, what's wrong with it ? public static BufferedImage Get_Component_Image(Component myComponent,Rectangle region) throws IOException { BufferedImage img = new BufferedImage(myComponent.getWidth(), myComponent.getHeight(), BufferedImage.TYPE_INT_RGB

问题 I have this simple code to go through a 24bit color windows bmp file BufferedImage mapa = BMPDecoder.read(new File("maps/map.bmp")); final int xmin = mapa.getMinX(); final int ymin = mapa.getMinY(); final int ymax = ymin + mapa.getHeight(); final int xmax = xmin + mapa.getWidth(); for (int i = xmin;i<xmax;i++) { for (int j = ymin;j<ymax;j++) { int pixel = mapa.getRGB(i, j); if (pixel == 0) { System.out.println("black at "+i+","+j); } } } However, when testing on a completely black image, I

问题 I was looking at the ImageConverter class, trying to figure out how to convert a BufferedImage to 8-bit color, but I have no idea how I would do this. I was also searching around the internet and I could find no simple answer, they were all talking about 8 bit grayscale images. I simply want to convert the colors of an image to 8 bit... nothing else, no resizing no nothing. Does anyone mind telling me how to do this. 回答1: This code snippet from the article "Transparent gifs in Java" at G-Man

问题 I have a BufferedImage created using J2D in an applet. I want to upload this BufferedImage using HTTP Post @ http://localhost:3001/upload/file. EDIT: I have a ROR server handling the serverside of things, I am looking for the Java code for the client. All the examples I can find involve uploading Files. Anybody know how to upload a BufferedImage? Cheers, slotishtype 回答1: OK, So here is the code that creates the bufferedimage, encodes it as a Base64 string and then using the apache commons

问题 I am trying to create a helper function using OpenCV Java API that would process an input image and return the output byte array. The input image is a jpg file saved in the computer. The input and output image are displayed in the Java UI using Swing. System.loadLibrary(Core.NATIVE_LIBRARY_NAME); // Load image from file Mat rgba = Highgui.imread(filePath); Imgproc.cvtColor(rgba, rgba, Imgproc.COLOR_RGB2GRAY, 0); // Convert back to byte[] and return byte[] return_buff = new byte[(int) (rgba