157 lines
5.5 KiB
Python
157 lines
5.5 KiB
Python
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
|
|
import warnings
|
|
|
|
# 抑制OpenCV的警告信息
|
|
import os
|
|
os.environ['OPENCV_LOG_LEVEL'] = 'ERROR'
|
|
cv2.setLogLevel(cv2.LOG_LEVEL_ERROR)
|
|
|
|
class GetImage:
|
|
def __init__(self, cam_index=0, width=1920, height=1080):
|
|
print(f"🔧 正在初始化采集卡 {cam_index}...")
|
|
self.cap = None
|
|
self.frame = None
|
|
self.running = True
|
|
self.cam_index = cam_index
|
|
|
|
# 尝试多种方式打开采集卡
|
|
backends_to_try = [
|
|
(cam_index, cv2.CAP_DSHOW),
|
|
(cam_index, cv2.CAP_ANY),
|
|
(cam_index, None), # 默认后端
|
|
]
|
|
|
|
for idx, backend in backends_to_try:
|
|
try:
|
|
with warnings.catch_warnings():
|
|
warnings.filterwarnings('ignore', category=UserWarning)
|
|
if backend is not None:
|
|
self.cap = cv2.VideoCapture(idx, backend)
|
|
else:
|
|
self.cap = cv2.VideoCapture(idx)
|
|
|
|
if self.cap.isOpened():
|
|
# 测试读取一帧
|
|
ret, test_frame = self.cap.read()
|
|
if ret and test_frame is not None:
|
|
print(f"✅ 采集卡 {cam_index} 打开成功")
|
|
break
|
|
else:
|
|
self.cap.release()
|
|
self.cap = None
|
|
except Exception as e:
|
|
if self.cap:
|
|
try:
|
|
self.cap.release()
|
|
except:
|
|
pass
|
|
self.cap = None
|
|
continue
|
|
|
|
if self.cap is None or not self.cap.isOpened():
|
|
print(f"❌ 无法打开采集卡 {cam_index}")
|
|
print("请检查：")
|
|
print(" 1. 采集卡是否正确连接")
|
|
print(" 2. 采集卡索引是否正确（尝试扫描采集卡）")
|
|
print(" 3. 采集卡驱动是否安装")
|
|
print(" 4. 采集卡是否被其他程序占用")
|
|
self.cap = None
|
|
return
|
|
|
|
# 设置分辨率
|
|
try:
|
|
self.cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
|
|
self.cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
|
|
# 实际获取设置后的分辨率
|
|
actual_width = int(self.cap.get(cv2.CAP_PROP_FRAME_WIDTH))
|
|
actual_height = int(self.cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
|
|
print(f" 分辨率设置: {width}x{height} -> 实际: {actual_width}x{actual_height}")
|
|
except Exception as e:
|
|
print(f"⚠️ 设置分辨率失败: {e}")
|
|
|
|
# 启动更新线程
|
|
threading.Thread(target=self.update, daemon=True).start()
|
|
|
|
# 等待几帧确保采集卡正常工作
|
|
import time
|
|
time.sleep(1.0)
|
|
print(f"✅ 采集卡 {cam_index} 初始化完成")
|
|
|
|
def update(self):
|
|
while self.running and self.cap is not None:
|
|
try:
|
|
ret, frame = self.cap.read()
|
|
if ret and frame is not None:
|
|
self.frame = frame
|
|
else:
|
|
# 读取失败时不打印，避免刷屏
|
|
pass
|
|
except Exception as e:
|
|
# 只在异常时打印错误
|
|
print(f"⚠️ 采集卡 {self.cam_index} 读取异常: {e}")
|
|
import time
|
|
time.sleep(0.1) # 出错时短暂延迟
|
|
|
|
def get_frame(self):
|
|
if self.cap is None or self.frame is None:
|
|
return None
|
|
try:
|
|
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]
|
|
except Exception as e:
|
|
print(f"⚠️ 图像处理错误: {e}")
|
|
return None
|
|
|
|
def release(self):
|
|
self.running = False
|
|
time.sleep(0.2)
|
|
if self.cap is not None:
|
|
self.cap.release()
|
|
cv2.destroyAllWindows()
|
|
|
|
# get_image 将在main.py中初始化
|
|
get_image = None |