Java操作图片裁剪

Edited on In

前言

Java 操作图片，实现图片的裁剪

裁剪图片

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public class ImageUtil {
    /**
     * 获取人脸图片数据
     *
     * @param pictureBytes 照片数据
     * @param contentType  请求内容类型
     * @param faceName     人脸模型名称
     * @return 人脸图片数据
     */
    private byte[] getFaceHead(String faceName, byte[] pictureBytes, MediaType contentType) {
        /*获取人脸位置与大小*/
        double[] faceDetectResult = this.getFaceDetectResult(faceName, pictureBytes, contentType);
        if (faceDetectResult[0] == 0
                && faceDetectResult[1] == 0
                && (faceDetectResult[2] == 0
                || faceDetectResult[3] == 0)) {
            log.warn("图片无法裁剪，使用原图片");
            return pictureBytes;
        }
        /*裁剪图片*/
        try {
            /*获取图片 buffer*/
            BufferedImage pictureImage = ImageIO.read(new ByteArrayInputStream(pictureBytes));
            final int width = pictureImage.getWidth();
            final int height = pictureImage.getHeight();
            /*图片裁剪*/
            int x = (int) (faceDetectResult[0] * width);
            /*坐标 - 10*/
            x = Math.max((x - 10), 0);
            int y = (int) (faceDetectResult[1] * height);
            /*坐标 - 10*/
            y = Math.max((y - 10), 0);
            int w = (int) (faceDetectResult[2] * width);
            /*宽度 + 10*/
            w = Math.min((w + 10), width - x);
            int h = (int) (faceDetectResult[3] * height);
            /*高度 + 10*/
            h = Math.min((h + 10), height - y);
            BufferedImage headImage = pictureImage.getSubimage(x, y, w, h);
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            ImageIO.write(headImage, "jpg", out);
            return out.toByteArray();
        } catch (IOException e) {
            log.warn("裁剪图片失败使用原照片 {}", e.getMessage());
            throw new RuntimeException("裁剪图片失败");
        }
    }
}

附录

1 图片操作类

  1. Image
  2. BufferedImage
    1. getSubimage 图片裁剪
  3. ImageIO
    1. read 读取图片
    2. wirte 写出图片

本文地址： https://github.com/maxzhao-it/blog/post/8bda86f4/