【python】opencv教程CV2模塊——圖片處理，HSV、色調、亮度調節

opencv教程CV2模塊——圖片處理，HSV、色調、亮度調節

代碼傳送門：

import cv2

img=cv2.imread('./imgg/1.jpeg', cv2.IMREAD_COLOR)    # 打開文件

# 通過cv2.cvtColor把圖像從BGR轉換到HSV
img_hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)

# H空間中，綠色比黃色的值高一點，所以給每個像素+15，黃色的樹葉就會變綠
turn_green_hsv = img_hsv.copy()
turn_green_hsv[:, :, 0] = (turn_green_hsv[:, :, 0]+15) % 180
turn_green_img = cv2.cvtColor(turn_green_hsv, cv2.COLOR_HSV2BGR)
cv2.imwrite('./out/turn_green.jpg', turn_green_img)

# 減小飽和度會讓圖像損失鮮艷，變得更灰
colorless_hsv = img_hsv.copy()
colorless_hsv[:, :, 1] = 0.5 * colorless_hsv[:, :, 1]
colorless_img = cv2.cvtColor(colorless_hsv, cv2.COLOR_HSV2BGR)
cv2.imwrite('./out/colorless.jpg', colorless_img)

# 減小明度為原來一半
darker_hsv = img_hsv.copy()
darker_hsv[:, :, 2] = 0.5 * darker_hsv[:, :, 2]
darker_img = cv2.cvtColor(darker_hsv, cv2.COLOR_HSV2BGR)
cv2.imwrite('./out/darker.jpg', darker_img)