img = np.zeros((300, 512, 3), np.uint8)
时间: 2023-11-13 11:03:07 浏览: 51
This line of code creates a NumPy array called "img" with dimensions of 300 pixels in height, 512 pixels in width, and 3 color channels (RGB). Each element in the array is of data type uint8, which represents an unsigned 8-bit integer. Since all elements are initialized to 0, this array represents a black image.
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img = np.zeros((512, 512, 3), np.uint8)
This line of code creates a NumPy array (img) with dimensions of 512x512 pixels and 3 color channels (red, green, and blue). Each pixel is represented by an 8-bit unsigned integer (np.uint8) which can have a value between 0 and 255. The initial values for all the pixels are set to 0, resulting in a black image.
img = np.zeros((400, 400, 3), dtype=np.uint8)把3去掉是什么意思
将 np.zeros() 函数生成的三维数组的最后一个维度设为1,即 np.zeros((400, 400, 1), dtype=np.uint8),表示生成一个400x400的灰度图像,每个像素值为一个8位的无符号整数。如果将最后一个维度设为2,则表示生成一个400x400的RGB图像,每个像素值为一个长度为3的一维数组,分别表示红、绿、蓝三个通道的亮度值。