python - numpy中进行维度变换(x,y,z)->(a,x,y,z)

Question

项目要进行图片的预处理
首先我读取了一张图片

我需要得出可以区分出每一个logo的数组

比如我这张图片是(160,160,3) (width,height,depth)
我希望把它转换为(5,32,32,3)(num, widht,height,depth): 5张logo，每张都是(32,32,3)

要用什么方式比较好呢？:)

Answer 1

Try reshape

Answer 2

Answer it yourself

img_together=[]
for row in range(0,224,32):
    for col in range(0,160,32):        
        img_together.append(img_arr[col:col+32,row:row+32,:])
img_together = np.array(img_together)