e680. 使三元色图像变明变暗

This example demonstrates how to brighten or darken an RGB buffered image by scaling the red, green, and blue values in the image.

    // To create a buffered image, see e666 创建缓冲图像

    // Brighten the image by 30%

    float scaleFactor = 1.3f;

    RescaleOp op = new RescaleOp(scaleFactor, 0, null);

    bufferedImage = op.filter(bufferedImage, null);

    // Darken the image by 10%

    scaleFactor = .9f;

    op = new RescaleOp(scaleFactor, 0, null);

    bufferedImage = op.filter(bufferedImage, null);

If the image is not an RGB image, the following code converts a non-RGB image to an RGB buffered image:

    // Get non-RGB image

    Image image = new ImageIcon("image.gif").getImage();

    // Create an RGB buffered image

    BufferedImage bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_RGB);

    // Copy non-RGB image to the RGB buffered image

    Graphics2D g = bimage.createGraphics();

    g.drawImage(image, 0, 0, null);

    g.dispose();

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巴特西

e680. 使三元色图像变明变暗

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