Merge branch 'youcans-master-patch-83847' into 'master'

上传新文件 梯度-3

See merge request !19

data/1.OpenCV初阶/3.图像增强和滤波/4.梯度/Gradient.py

+import cv2 as cv
+
+if __name__ == '__main__':
+    img = cv.imread("lena.png", flags=1)
+    imgGray = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
+
+    SobelX = cv.Sobel(imgGray, cv.CV_16S, 1, 0)  # 计算 x 轴方向
+    SobelY = cv.Sobel(imgGray, cv.CV_16S, 0, 1)  # 计算 y 轴方向
+    absX = cv.convertScaleAbs(SobelX)  # 转回 uint8
+    absY = cv.convertScaleAbs(SobelY)  # 转回 uint8
+    SobelXY = cv.addWeighted(absX, 0.5, absY, 0.5, 0)  # 用绝对值近似平方根
+
+    cv.imshow("Sobel gradient", SobelXY)
+    cv.waitKey(0)
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