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计算机视觉库OpenCV中shape和resize函数的区别

發(fā)布時間:2025/5/22 21 豆豆
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OpenCV官網(wǎng)說明:(shape為圖片(高度,寬度,通道數(shù)))

Image properties include number of rows, columns and channels, type of image data, number of pixels etc.

The shape of an image is accessed by img.shape. It returns a tuple of number of rows, columns, and channels (if image is color):

>>> print( img.shape ) (342, 548, 3)

If an image is grayscale, the tuple returned contains only the number of rows and columns, so it is a good method to check whether the loaded image is grayscale or color.

?Total number of pixels is accessed by img.size:

>>> print( img.size ) 562248

?resize函數(shù)說明:(size為圖片(寬度,高度))

dst = cv.resize(src, dsize[, dst[, fx[, fy[, interpolation]]]])
dsizeoutput image size; if it equals zero, it is computed as:

dsize = Size(round(fx*src.cols), round(fy*src.rows))

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