Opencv：獲取圖像中的段大小並刪除小段 (Opencv: Get segments sizes in image and remove small segments)

問題描述

我是 openCV 的新手（在 Android 上），找不到對二進製圖像進行基本分割並獲取片段（帶有黑色像素）大小的方法，然後從給定閾值的圖像中刪除小片段。請注意，我不需要只找到輪廓，我需要獲得完全連接的像素（段）大小。之後過濾小的。

示例圖像在下面

I solved it with findContours (thanks to @Micka for pushing me).

Here are the code samples for parts which I needed. 1. I did inversion of binary image, because I needed to get black segments
2. Segmentation:



    Imgproc.findContours(mat, contours, mHierarchy, Imgproc.RETR_LIST, Imgproc.CHAIN_APPROX_NONE);

remove small segments
each = contours.iterator(); while (each.hasNext()) { MatOfPoint wrapper = each.next(); double area = Imgproc.contourArea(wrapper); if(area <= lengthThreshold){ each.remove(); } }

4. Draw new image with segments



    Imgproc.drawContours(newImg, contours, ‑1, new Scalar(0, 0, 0), 1);
    Imgproc.fillPoly(newImg, contours, new Scalar(0, 0, 0));