opencv3 图像处理 4-8

Author: budaLi

opencv3图像处理/demo01.py

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+# @Time    : 2020/4/8 14:41
+# @Author  : Libuda
+# @FileName: demo01.py
+# @Software: PyCharm
+import cv2 as cv
+import time
+
+img_path = "test.jpg"
+
+
+def op_image():
+    src = cv.imread(img_path)
+
+    # 图像分辨率和色彩通道  (1920, 1080, 3)
+    print(src.shape)
+    # 图片大小 字节  6220800 (1920 x 1080 x 3)
+    print(src.size)
+
+    # 每个像素三通道 数据类型
+    print(src.dtype)
+
+    # cv.namedWindow("my pic",cv.WINDOW_FULLSCREEN)
+
+    cv.imshow("img", src)
+
+    cv.waitKey(0)
+
+    cv.destroyAllWindows()
+
+
+def op_vedio():
+    # 多个摄像头 索引
+    capture = cv.VideoCapture(0)
+
+    while 1:
+        # frame 图片的每一帧
+        ret, frame = capture.read()
+        # 镜像调换 上下 1 为正
+        frame = cv.flip(frame, -1)
+        cv.imshow("video", frame)
+        c = cv.waitKey(50)
+
+        # esc退出
+        if c == 27:
+            break
+
+
+def get_op_time():
+    t1 = cv.getTickCount()
+    import time
+    time.sleep(3)
+    t2 = cv.getTickCount()
+
+    time = (t2 - t1) / cv.getTickFrequency()
+
+    print(time)
+
+
+if __name__ == '__main__':
+    # op_vedio()
+    get_op_time()