可以稳刷的单机版本

utils/get_image.py

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+import time
+
+from PIL import Image
+import cv2
+# class GetImage:
+#     def __init__(self, cam_index=0, width=1920, height=1080):
+#         self.cap = cv2.VideoCapture(cam_index,cv2.CAP_DSHOW)
+#
+#         if not self.cap.isOpened():
+#             raise RuntimeError(f"无法打开摄像头 {cam_index}")
+#         self.cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
+#         self.cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
+#         print(f"✅ 摄像头 {cam_index} 打开成功，分辨率 {width}x{height}")
+#     def get_frame(self):
+#         ret, im_opencv = self.cap.read()
+#         im_opencv = cv2.cvtColor(im_opencv, cv2.COLOR_BGR2RGB)  # rgb 修改通道数并转换图像
+#         im_opencv = im_opencv[30:30+720, 0:1280]#裁剪尺寸
+#         im_PIL = Image.fromarray(im_opencv)  # 图像改成对象类型
+#
+#         return [im_opencv, im_PIL]
+#     def release(self):
+#         self.cap.release()
+#         cv2.destroyAllWindows()
+#         print("🔚 摄像头已释放")
+#     def __del__(self):
+#         # 以防忘记手动释放
+#         if hasattr(self, "cap") and self.cap.isOpened():
+#             self.release()
+#
+# get_image = GetImage()
+#
+# if __name__ == '__main__':
+#     while True:
+#         if cv2.waitKey(1) & 0xFF == ord('q'):
+#             break
+#         a=get_image.get_frame()
+#         cv2.imshow('image',a[0])
+#         print(a[0].shape)
+#
+#
+#     cv2.destroyAllWindows()
+
+import threading
+
+class GetImage:
+    def __init__(self, cam_index=0, width=1920, height=1080):
+        self.cap = cv2.VideoCapture(cam_index, cv2.CAP_DSHOW)
+        self.cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
+        self.cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
+        self.frame = None
+        self.running = True
+        threading.Thread(target=self.update, daemon=True).start()
+
+    def update(self):
+        while self.running:
+            ret, frame = self.cap.read()
+            if ret:
+                self.frame = frame
+
+    def get_frame(self):
+        if self.frame is None:
+            return None
+        im_opencv = cv2.cvtColor(self.frame, cv2.COLOR_BGR2RGB)
+        im_opencv = im_opencv[30:30+720, 0:1280]
+        im_PIL = Image.fromarray(im_opencv)
+        return [im_opencv, im_PIL]
+
+    def release(self):
+        self.running = False
+        time.sleep(0.2)
+        self.cap.release()
+        cv2.destroyAllWindows()
+get_image = GetImage()