bufferedimage

问题 I am trying to convert an image (url below) using two libraries (thumbnailator and imgscalr. My code works on most of the images except a few which after conversion have a pink/reddish tint. I am trying to understand the cause and would welcome any recommendation. Note - Image type of this image is 5 i.e BufferedImage.TYPE_3BYTE_BGR and i am using Java 7 Using Thumbnailator Thumbnails.of(fromDir.listFiles()) .size(thumbnailWidth, thumbnailHeight) .toFiles(Rename.SUFFIX_HYPHEN_THUMBNAIL);

问题 I have a simple server-side code that receives a byte array representing an image in JPEG format and returns the dimensions of the image. public String processImage(byte[] data) { long startTime = System.currentTimeMillis(); ByteArrayInputStream stream = new ByteArrayInputStream(data); BufferedImage bufferedImage; bufferedImage = ImageIO.read(stream); int height = bufferedImage.getHeight(); int width = bufferedImage.getWidth(); long endTime = System.currentTimeMillis(); return "height="

问题 I have a method in my application called "Save as" which Saves the image of my application on computer my into a file. I used the JFileChooser to let the users choose their desired location for saving the file. The problem is unless user explicitly types in the file format, it saves the file with no extension. How can I have formats like jpg, png in the File Type drop down menu. and, how can i get extension from the File Type drop menu for saving my image file. ImageIO.write(image,extension

问题 Im working on a paint application written in java and running into a few (more) problems. I have a gui and a working program(kinda), my only problem is that the lines and graphics that the user draws are not saved(disappear after next one is drawn). From a past question i learned that i will need to use a BufferedImage to store the drawings then paint that inside my paint class. My questions are, Can anyone provide a basic explanation/example of how to use a bufferedimage to store and paint

问题 I've been trying to convert a ImageIcon to BufferedImage ... And I've had no luck. I have a pre-existing ImageIcon that needs to be converted to a Buffered Image for the vast amount of BufferedImage operations that exist. I have found a few ways, but all of them are hugely CPU intensive. 回答1: What's wrong with: BufferedImage bi = new BufferedImage( icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_RGB); Graphics g = bi.createGraphics(); // paint the Icon to the BufferedImage.

问题 I'm trying to create an image (screen-shot) of a non-visible AWT component. I can't use the Robot classes' screen capture functionality because the component is not visible on the screen. Trying to use the following code: BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); component.paintAll(g); Works sometimes, but does not work if the component contains things such as a text box or button, or some sort of OpenGL / 3D

问题 I have a paint programme and i have all the buttons and sliders done however i am having a problem with the actual painting itself. When I drag the cursor across the screen instead of an unbroken line I am getting almost a dotted line which i dont want. Here's the code for the MouseListener in the JPanel and BufferedImage : public void mouseDragged(MouseEvent e) { Graphics g=buffered.getGraphics(); g.setColor(mycol); Graphics2D graph=(Graphics2D)g; BasicStroke stroke=new BasicStroke(30);

问题 I have a problem saving large (f.e. 12 000 x 9 000 ) images. I'm developing a graphical editing software ( something like simple Photoshop ) and The user obviously has to have to ability to save the image. Lets say I would like to save the image as .png. Does JAVA always need to use the BufferedImage for saving drawn stuff ? I know the equation for size of the image is: Xsize * Ysize * 4 ( red, green, blue, alpha ) So in this case we get over 400 MB. I know I could save the image in parts (

问题 I want to increase the resolution of a image. I used PDFRenderer-0.9.0 jar . It is downloaded from java.net for converting PDF pages to images. I want to Convert 46_2.pdf PDF file to image . The converted 46_2.png image is small with dimensions 612 x 792 [ width x height ] , So I want to increase the image dimensions to 1200 x 1400 [ width x height] . I tried previously PdfBox for converting PDF page into PNG image file. There is a problem only page is converted but text is missing . So I

问题 I'm making with the Robot class a printscreen and I convert the BufferedImage into an int array. Then I want to convert the int array back to a bufferedimage but that gives an error. This is my code: Dimension screen = Toolkit.getDefaultToolkit().getScreenSize(); BufferedImage printscreen = robot.createScreenCapture(new Rectangle(screen)); int[] pixels = ((DataBufferInt) printscreen.getRaster().getDataBuffer()).getData(); BufferedImage image = new BufferedImage(screen.width, screen.height,