完成1、2、3、5题

test/2024,9,23/homework.py

@@ -0,0 +1,22 @@
+import cv2 as cv
+
+# 1
+img=cv.imread("sample.jpg",cv.IMREAD_GRAYSCALE)
+# 2
+def draw_circle(event,x,y,flags,param):
+    if event==cv.EVENT_LBUTTONDOWN:
+        cv.circle(img,(x,y),10,0,-1)
+#3
+cv.namedWindow('modify_sample')
+cv.setMouseCallback('modify_sample',draw_circle)
+#4
+alpha=0.3
+beta=80
+while(1):
+    cv.imshow('modify_sample',img)
+    pressedKey=cv.waitKey(5)
+    # 5
+    if pressedKey==ord('q'):
+        break
+    if pressedKey==ord('s'):
+        cv.imwrite('modified_sample.jpg',img)