请问余老师，我看源码，图片在送入网络前会转成27通道，我需要训练单通道的图片，应该怎么修改呢

[kevinkinking]

     //only 27 elements used for each pixel
    create((imgHeight+1)/2, (imgWidth+1)/2, 32);
    //since the pixel assignment cannot fill all the elements in the blob.
    //some elements in the blob should be initialized to 0
    setZero();