python基于opencv火焰识别
时间: 2023-10-10 19:08:03 浏览: 209
Python基于OpenCV的火焰识别可以通过以下步骤实现:
1.导入OpenCV库和必要的模块
```python
import cv2
import numpy as np
import imutils
```
2.读取视频文件或者摄像头
```python
# 视频文件
video = cv2.VideoCapture("video.mp4")
# 摄像头
camera = cv2.VideoCapture(0)
```
3.定义火焰检测函数
```python
def fire_detection(frame):
# 转换为灰度图像
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
# 高斯滤波
blur = cv2.GaussianBlur(gray, (21, 21), 0)
# 计算平均值和标准差
(mean, std) = cv2.meanStdDev(blur)
# 判断是否为火焰
if std[0][0] > 10:
return True
else:
return False
```
4.循环读取每一帧图像,进行火焰检测
```python
while True:
# 读取每一帧图像
(grabbed, frame) = camera.read()
# 判断是否读取到图像
if not grabbed:
break
# 缩小图像
frame = imutils.resize(frame, width=500)
# 进行火焰检测
if fire_detection(frame):
cv2.putText(frame, "Fire Detected!", (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 0, 255), 2)
# 显示图像
cv2.imshow("Fire Detection", frame)
# 等待按键
key = cv2.waitKey(1) & 0xFF
# 按下q键退出
if key == ord("q"):
break
```
5.释放摄像头或者关闭视频文件
```python
camera.release()
video.release()
```
完整代码实现:
```python
import cv2
import numpy as np
import imutils
def fire_detection(frame):
# 转换为灰度图像
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
# 高斯滤波
blur = cv2.GaussianBlur(gray, (21, 21), 0)
# 计算平均值和标准差
(mean, std) = cv2.meanStdDev(blur)
# 判断是否为火焰
if std[0][0] > 10:
return True
else:
return False
# 视频文件
video = cv2.VideoCapture("video.mp4")
# 摄像头
camera = cv2.VideoCapture(0)
while True:
# 读取每一帧图像
(grabbed, frame) = camera.read()
# 判断是否读取到图像
if not grabbed:
break
# 缩小图像
frame = imutils.resize(frame, width=500)
# 进行火焰检测
if fire_detection(frame):
cv2.putText(frame, "Fire Detected!", (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 0, 255), 2)
# 显示图像
cv2.imshow("Fire Detection", frame)
# 等待按键
key = cv2.waitKey(1) & 0xFF
# 按下q键退出
if key == ord("q"):
break
camera.release()
video.release()
cv2.destroyAllWindows()
```
注意:该方法只能作为基础的火焰检测,不能用于实际应用中,因为它存在一定的误检率和漏检率。如果需要进行更加精确的火焰检测,需要使用更加复杂的算法和模型。
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