caffe中利用imread如何读取和存储4通道的image

C++ read codes:

cv::Mat cv_img = cv::imread("./1.png",-1);std::cout<< cv_img.channels()<< std::endl;// prints 4

Matlab Write codes:

imwrite(A, './1.png', TIFF); // here, A should be 4 channels data

Ref:

http://blog.csdn.net/yhl_leo/article/details/49737357

http://blog.inet198.cn/?liulina603/article/details/43053957

http://blog.skyoung.org/2014/03/26/OpenCV(III)-How-to-use-Mat/