autojs从书的中间分割成两张

Imgproc.Canny(grayMat, cannyMat, lowThreshold, lowThreshold * ratio, kernel_size, false);

function getHoughLinesP(mat, size) {
  let lines = new Mat();
  let threshold = size / 5; // 阈值，只有获得足够交点的极坐标点才被看成是直线
  let minLineSize = size; // 最小直线长度，有默认值0，表示最低线段的长度，比这个设定参数短的线段就不能被显现出来。
  let lineGap = size; // 最大间隔，有默认值0，允许将同一行点与点之间连接起来的最大的距离。
  Imgproc.HoughLinesP(mat, lines, 1, Math.PI / 180, threshold, minLineSize, lineGap);
  return lines;
}

function filterLineDataList(lines) {
  // { angle: 90, distance: 786, x1: 4, y1: 925, x2: 4, y2: 139 },
  let newLines = [];
  var len = lines.length;
  let centerX = img.width / 2;
  for (var i = 0; i < len; i++) {
    let line = lines[i];
    if (Math.abs(line.x1 - centerX) < img.width / 4 && Math.abs(line.x2 - centerX) < img.width / 4) {
      newLines.push(line);
    }
  }
  return newLines;
}

function getFocusCoordinatesOfTwoLines(line1, line2) {
  var x1 = line1.x1;
  var y1 = line1.y1;
  var x2 = line1.x2;
  var y2 = line1.y2;
  var x3 = line2.x1;
  var y3 = line2.y1;
  var x4 = line2.x2;
  var y4 = line2.y2;
  var x =
    ((x1 * y2 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3 * x4)) /
    ((x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4));
  var y =
    ((x1 * y2 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * y4 - y3 * x4)) /
    ((x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4));
  return { x: x, y: y };
}

let clipImg = images.clip(img, 0, 0, leftPageTopSideLength, img.height);
pts.add(new MatOfPoint(topLeftPoint, topRightPoint, bottomRightPoint, bottomLeftPoint, topLeftPoint));
Imgproc.fillPoly(polyMat, pts, Scalar(255), 1);
Core.bitwise_and(clipImg.mat, newPolyMat, newMat);