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Opencv reports an error. Expected PTR < CV:: UMAT > for argument '% s'‘

2022-04-23 20:47:00 【NuerNuer】

In the use of opencv When processing images , Use cv2.imwrite() Errors are always reported when saving images ：

Expected Ptr＜cv::UMat＞ for argument '%s'

Look up the data and find , stay cv::UMat When passing parameters , Type must be np.float32, Pass in another type （ example ,np.int32） Will report a mistake

terms of settlement ：

img_ = np.float32(img)
......
cv2.imwrite('a.jpg', img_)

namely , Convert other types of data into np.float32

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