I’m not convinced its a good idea to return image data in a REST service. It ties up your application server’s memory and IO bandwidth. Much better to delegate that task to a proper web server that is optimized for this kind of transfer. You can accomplish this by sending a redirect to the image … Read more
You have tagged your question with Android. javax.imageio.ImageIO is not part of the Android platform, so unfortunately you can’t use it. Instead you need to use what’s available in the Android SDK for reading and storing images. Have a look at the Bitmap and BitmapFactory classes for a starting point. These classes contains the necessary … Read more
OpenJDK does not have a native JPEG encoder, try using Sun’s JDK, or using a library (such as JAI AFAIK, regarding the “pinkish tint”, Java saves the JPEG as ARGB (still with transparency information). Most viewers, when opening, assume the four channels must correspond to a CMYK (not ARGB) and thus the red tint. If … 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.
I ran across this question, and decided to try it out; It took a small but non-trivial amount create a usable class (thanks ax) — so I thought I might share the code around: here is a small class for creating an animated gif image from a number of other images. Archived version
Files in a Jar are not files in the sense of a file on disk. They are simply a (possibly) compressed stream of bytes. Java makes it easy to extract these “resources” from Jar files through the use of the ClassLoader background = ImageIO.read(getClass().getResource(“/wood.jpeg”)); Should work… This will return a URL which ImageIO can use … Read more
If you want all the frames to be the same size (for optimized GIFs) try something like this: try { String[] imageatt = new String[]{ “imageLeftPosition”, “imageTopPosition”, “imageWidth”, “imageHeight” }; ImageReader reader = (ImageReader)ImageIO.getImageReadersByFormatName(“gif”).next(); ImageInputStream ciis = ImageIO.createImageInputStream(new File(“house2.gif”)); reader.setInput(ciis, false); int noi = reader.getNumImages(true); BufferedImage master = null; for (int i = 0; i … Read more
try(ImageInputStream in = ImageIO.createImageInputStream(resourceFile)){ final Iterator<ImageReader> readers = ImageIO.getImageReaders(in); if (readers.hasNext()) { ImageReader reader = readers.next(); try { reader.setInput(in); return new Dimension(reader.getWidth(0), reader.getHeight(0)); } finally { reader.dispose(); } } } Thanks to sfussenegger for the suggestion
Old post, but for future reference: Inspired by this question and links found here, I’ve written a JPEGImageReader plugin for ImageIO that supports CMYK color models (both with original color model, or implicitly converted to RGB on read). The reader also does proper color conversion, using the ICC profile embedded in the JPEG stream, in … Read more
Here is something very simple and handy. BufferedImage bimg = ImageIO.read(new File(filename)); int width = bimg.getWidth(); int height = bimg.getHeight();