冒泡

test/2024,09,29/homework.py

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+import cv2 as cv
+import numpy as np
+
+# 1
+img = cv.imread("sample.jpg", cv.IMREAD_GRAYSCALE)
+img2 = 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)
+
+
+# 4
+alpha = 0.3
+
+
+def updateBrightness(x):
+    global alpha, img, img2
+    alpha = cv.getTrackbarPos('Brightness', 'modify_sample')
+    alpha = alpha * 0.01
+    img = np.uint8(np.clip((alpha * img2), 0, 255))
+
+
+# 3
+cv.namedWindow('modify_sample')
+cv.createTrackbar('Brightness', 'modify_sample', 0, 255, updateBrightness)
+cv.setTrackbarPos('Brightness', 'modify_sample', 100)
+cv.setMouseCallback('modify_sample', draw_circle)
+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)