The panel needs to be laid out based on it’s requirements. If the panel hasn’t being realized on the screen yet, it may not render the way you expect it do The following example assumes that the panel has not being displayed on the screen… setSize(getPreferredSize()); BufferedImage image = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB); Graphics2D g … Read more
After you clear the background with the CLEAR composite, you need to set it back to SRC_OVER to draw normally again. ex: //clear g2.setComposite(AlphaComposite.getInstance(AlphaComposite.CLEAR)); g2.fillRect(0,0,256,256); //reset composite g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER)); //draw g2.setPaint(Color.RED); g2.fillOval(50,50,100,100);
File outputfile = new File(“image.jpg”); ImageIO.write(bufferedImage, “jpg”, outputfile);
Unfortunately, there is no recommended out-of-the-box scaling in Java that provides visually good results. Among others, here are the methods I recommend for scaling: Lanczos3 Resampling (usually visually better, but slower) Progressive Down Scaling (usually visually fine, can be quite fast) One-Step scaling for up scaling (with Graphics2d bicubic fast and good results, usually not … Read more
Try using this:- this.icon = ImageIO.read(new FileInputStream(“res/test.txt”)); where res folder is present at the same level as your src folder. Also, if you notice, the slash / before the res folder name was removed.
First, JSP is a view technology providing a template to write HTML/CSS/JS in and the ability to interact with backend Java code to control page flow and access backend data. Your problem is more in HTML. Now, to display an image in a HTML page, you need the HTML <img> element. To define/allocate an image, … Read more
I also was trying to do the same thing, because of need to combining image processed with two libraries. And what I’ve tried to do is to put byte[] in to Mat instead of RGB value. And it worked! So what I did was: 1.Converted BufferedImage to byte array with: byte[] pixels = ((DataBufferByte) image.getRaster().getDataBuffer()).getData(); … Read more
Updated answer I cannot recall why my original answer worked but having tested it in a separate environment, I agree, the original accepted answer doesn’t work (why I said it did I cannot remember either). This, on the other hand, did work: public static BufferedImage resize(BufferedImage img, int newW, int newH) { Image tmp = … Read more
The best article I have ever read on this topic is The Perils of Image.getScaledInstance() (web archive). In short: You need to use several resizing steps in order to get a good image. Helper method from the article: public BufferedImage getScaledInstance(BufferedImage img, int targetWidth, int targetHeight, Object hint, boolean higherQuality) { int type = (img.getTransparency() … Read more
ImageIO is not supported in Android SDK Could you achieve the same thing with Bitmap and BitmapFactory?? like so… Bitmap tgtImg = BitmapFactory.decodeFile(“ImageD2.jpg”); if tgtImg is not null after this then it was successful.