autojs-查看图片平均亮度

思路:

把图片转为hsv
得到Mat中各个通道的均值,
提取亮度通道的平均值

console.time("导入类");
runtime.images.initOpenCvIfNeeded();
importClass(org.opencv.core.MatOfByte);
importClass(org.opencv.core.Scalar);
importClass(org.opencv.core.Point);
importClass(org.opencv.core.CvType);
importClass(java.util.List);
importClass(java.util.ArrayList);
importClass(java.util.LinkedList);
importClass(org.opencv.imgproc.Imgproc);
importClass(org.opencv.imgcodecs.Imgcodecs);
importClass(org.opencv.core.Core);
importClass(org.opencv.core.Mat);
importClass(org.opencv.core.MatOfDMatch);
importClass(org.opencv.core.MatOfKeyPoint);
importClass(org.opencv.core.MatOfRect);
importClass(org.opencv.core.Size);
importClass(org.opencv.features2d.DescriptorExtractor);
importClass(org.opencv.features2d.DescriptorMatcher);
importClass(org.opencv.features2d.FeatureDetector);
importClass(org.opencv.features2d.Features2d);
importClass(org.opencv.core.MatOfPoint2f);
importClass(org.opencv.core.MatOfPoint);
importClass(org.opencv.android.Utils);
console.timeEnd("导入类");

// 第一种写法, 参数为文件路径
function getBrightnessHsv(imgPath) {
  let hsv = new Mat();
  let src = Imgcodecs.imread(imgPath);
  Imgproc.cvtColor(src, hsv, Imgproc.COLOR_RGB2HSV);
  let avg = Core.mean(hsv);
  hsv.release();
  src.release();
  let result = avg.val[2];
  log("the average brightness(HSV) is " + result);
}
getBrightnessHsv();

// 第二种写法, 参数为autojs的图片
function getBrightnessHsv(img) {
  let bitmap = img.getBitmap();
  let src = new Mat();
  Utils.bitmapToMat(bitmap, src);
  let hsv = new Mat();
  Imgproc.cvtColor(src, hsv, Imgproc.COLOR_RGB2HSV);
  let avg = Core.mean(hsv);
  hsv.release();
  src.release();
  bitmap.recycle();
  let result = avg.val[2];
  log("the average brightness(HSV) is " + result);
}
getBrightnessHsv();

声明

部分内容来自网络
本教程仅用于学习, 禁止用于其他用途