日常使用

Author: makelove

ch04-图片/show_image.py

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+# -*- coding: utf-8 -*-
+# @Time    : 2018/1/19 20:39
+# @Author  : play4fun
+# @File    : show_image.py
+# @Software: PyCharm
+
+"""
+show_image.py:
+制作有用的工具，日常使用
+在环境变量中设置：
+alias show='/Users/play/.py3/bin/python3.6 /Users/play/github/OpenCV-Python-Tutorial/ch04-图片/show_image.py '
+
+"""
+
+import numpy as np
+import cv2, sys
+
+if len(sys.argv) < 2:
+    print('show_image.py image_path')
+    sys.exit(0)
+
+image_path = sys.argv[1]
+try:
+    f = open(image_path)
+except Exception as e:
+    print(e)
+    sys.exit(-1)
+
+img = cv2.imread(image_path, cv2.IMREAD_UNCHANGED)  # 包括图像的 alpha 通道
+temp = img.copy()
+
+title = image_path.split('/')[-1] + f' {img.shape}'
+
+gray = False
+while True:
+    cv2.imshow(title, temp)
+
+    k = cv2.waitKey(10)
+    if k == 27 or k == ord('q'):
+        break
+    #TODO 分辨率太大，需要缩放
+    if k == ord('g'):
+        # t = temp == img
+        # if t.all():
+        # if t.any():
+        # if temp == img:
+        if gray is False:
+            temp = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
+            gray = True
+        else:
+            temp = img.copy()
+            gray = False
+
+cv2.destroyAllWindows()