提高OpenCV中的摄像头捕获分辨率

import cv2

# 创建VideoCapture对象
cap = cv2.VideoCapture(0)

# 设置捕获分辨率
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1280)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 720)

while True:
    # 读取帧
    ret, frame = cap.read()

    # 显示帧
    cv2.imshow('frame', frame)

    # 按下q键退出循环
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# 释放资源
cap.release()
cv2.destroyAllWindows()

import cv2

# 创建VideoCapture对象
cap = cv2.VideoCapture(0)

# 获取摄像头支持的分辨率列表
resolutions = []
for i in range(3):
    res_width = cap.get(cv2.CAP_PROP_FRAME_WIDTH_MIN + i)
    res_height = cap.get(cv2.CAP_PROP_FRAME_HEIGHT_MIN + i)
    resolutions.append((res_width, res_height))

# 选择合适的分辨率
cap.set(cv2.CAP_PROP_FRAME_WIDTH, resolutions[0][0])
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, resolutions[0][1])

while True:
    # 读取帧
    ret, frame = cap.read()

    # 显示帧
    cv2.imshow('frame', frame)

    # 按下q键退出循环
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# 释放资源
cap.release()
cv2.destroyAllWindows()