OpenCV python 輪廓(連通域)凸包

處理圖檔:[hand.jpg]

import cv2


def main():

    # 1.導入圖檔, 顯示原始圖檔
    img_src = cv2.imread("hand.jpg")

    # 2.灰階化,二值化
    img_gray = cv2.cvtColor(img_src, cv2.COLOR_BGR2GRAY)
    ret, img_bin = cv2.threshold(img_gray, 127, 255, cv2.THRESH_BINARY)

    # 3.連通域分析
    img_bin, contours, hierarchy = cv2.findContours(img_bin,
                                                    cv2.RETR_LIST,
                                                    cv2.CHAIN_APPROX_SIMPLE)

    # 4.擷取輪廓凸包
    hull_points = cv2.convexHull(contours[0])

    # 5.繪制凸包
    img_result = img_src.copy()
    cv2.polylines(img_result, [hull_points], True, (0, 255, 0), 2)

    # 6.顯示結果
    cv2.imshow("img_src", img_src)
    cv2.imshow("img_result", img_result)

    cv2.waitKey()
    cv2.destroyAllWindows()


if __name__ == '__main__':
    main()

           

處理結果圖檔:[img_result.jpg]