I'm using AsyncScalr in a Servlet to scale down some large images (~ 10-15 MegaBytes), the actual resizing process takes about 40ms which is not much. The overkill comes from Reading the Image from Local Storage as a BufferedImage. so the times are mostly like :
read the image file : 1630ms !! resizing the image : 41ms writing the image : 40ms
below is the code that I'm using, is there any more optimal way to do this?
final FileImageInputStream fileImageInputStream = new FileImageInputStream(file);
BufferedImage bufferedImage = ImageIO.read(fileImageInputStream);
// resize file
Future<BufferedImage> result = AsyncScalr.resize(bufferedImage, Method.SPEED, width, OP_ANTIALIAS, OP_BRIGHTER);
try {
bufferedImage = result.get();
}
catch (InterruptedException e) {
e.printStackTrace();
}
catch (ExecutionException e) {
e.printStackTrace();
}
// Write the image
ImageIO.write(bufferedImage, imageOutput, outputStream);
to answer my question, using java.awt.Toolkit to load images has solved the problem.
来源:https://stackoverflow.com/questions/12142069/scale-large-images-using-java-and-asyncscalr