JAI Core framework introduction and application instance
The JAI Core framework is one of the core components of the Java advanced image processing library.JAI represents "Java Advanced Imaging", which provides a set of powerful tools and functions for processing and operation of various types of images.The design goal of the JAI Core framework is to provide high -performance image processing functions while maintaining simple and easy to use and flexible.
The JAI Core framework provides rich image processing operations, including image decoding, scaling, rotation, cutting, filtering, synthesis, etc.It also supports various image formats, such as JPEG, PNG, TIFF, etc.Not only that, JAI Core also provides some advanced image processing functions, such as image segmentation, feature extraction, image stitching, etc.
The following are some common application examples of the JAI CORE framework:
1. Image processing: Through the JAI core framework, various processing operations can be performed on the image, such as changing the size of the image, adjusting the brightness and contrast of the image, and enhancing the sharpness of the image.Below is a simple Java code example, which shows how to use JAI Core to use the image to zoom in the image:
import javax.media.jai.*;
import java.awt.image.RenderedImage;
import java.io.File;
public class ImageProcessingExample {
public static void main(String[] args) {
try {
// Read the original image
RenderedImage image = JAI.create("fileload", new File("input.jpg").getAbsolutePath());
// Scaling image
ParameterBlock pb = new ParameterBlock();
pb.addSource(image);
PB.ADD (0.5); // A zena ratio
PB.ADD (0.5); // A zena ratio
pb.add (0.0); // Horizontal offset
pb.add (0.0); // vertical offset
pb.add (interpola
RenderedOp result = JAI.create("scale", pb);
// Save the processed image to the file
JAI.create("filestore", result, "output.jpg", "JPEG");
} catch (Exception e) {
e.printStackTrace();
}
}
}
2. Image stitching: Using the JAI core framework, you can stitch multiple images into a large picture.The following is an example that shows how to use Jai Core to stitch multiple images into a grid image:
import javax.media.jai.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
public class ImageMosaicExample {
public static void main(String[] args) {
try {
// Read the original image
RenderedImage image1 = JAI.create("fileload", new File("image1.jpg").getAbsolutePath());
RenderedImage image2 = JAI.create("fileload", new File("image2.jpg").getAbsolutePath());
RenderedImage image3 = JAI.create("fileload", new File("image3.jpg").getAbsolutePath());
// Create a container to create output image
BufferedImage mosaic = new BufferedImage(2 * image1.getWidth(), 2 * image1.getHeight(), BufferedImage.TYPE_INT_RGB);
// Draw the original image into the container
Graphics2D g2d = mosaic.createGraphics();
g2d.drawImage(image1, 0, 0, null);
g2d.drawImage(image2, image1.getWidth(), 0, null);
g2d.drawImage(image3, 0, image1.getHeight(), null);
g2d.dispose();
// Save the processed image to the file
JAI.create("filestore", mosaic, "output.jpg", "JPEG");
} catch (Exception e) {
e.printStackTrace();
}
}
}
In short, the JAI Core framework provides a powerful image processing function for Java developers, and is simple and flexible.Through JAI Core, we can easily process images to meet various image processing needs.
