Tinker board 安装 OpenCV

Tinker board 使用摄像头跳转：https://blog.csdn.net/chenjambo/article/details/125928360

安装 OpenCV

$ pip3 install pip --upgrade
$ pip3 install opencv-python --user

导入 cv2 ，并输出版本以验证是否安装成功

$ python3 -c "import cv2; print(cv2.__version__)"
4.6.0

测试

新建 cv_transforms.py 文件，编辑以下内容。此脚本会使用摄像头并打开四个窗口，分别显示摄像头的原画面，和经过处理后的降画质、灰阶、边缘检测。

#!/usr/bin/python3
import cv2
import numpy as np

# capCamera = cv2.VideoCapture(0) # CSI camera default index
capCamera = cv2.VideoCapture(5)  # USB camera default index

windowName = "cv transforms"
while capCamera.isOpened():
    isRead, frame = capCamera.read()
    hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    blur = cv2.GaussianBlur(hsv, (7, 7), 1.5)
    edges = cv2.Canny(blur, 0, 40)

    dispFrame = cv2.resize(frame, (640, 360))
    dispHsv = cv2.resize(hsv, (640, 360))
    dispBlur = cv2.resize(blur, (640, 360))
    dispEdges = cv2.resize(edges, (640, 360))

    dispLine1 = np.concatenate(
        (dispFrame, cv2.cvtColor(dispEdges, cv2.COLOR_GRAY2BGR)), axis=1
    )
    dispLine2 = np.concatenate(
        (
            cv2.cvtColor(dispHsv, cv2.COLOR_GRAY2BGR),
            cv2.cvtColor(dispBlur, cv2.COLOR_GRAY2BGR),
        ),
        axis=1,
    )

    dispAll = np.concatenate((dispLine1, dispLine2), axis=0)
    cv2.imshow(windowName, dispAll)
    if cv2.waitKey(10) == 27:
        break
camera.release()
cv2.destroyAllWindows()

用 python3 启动脚本

python3 cv_transforms.py