thanks for your answer
unlike the gray scale and color images which have 1 and 3 channels respectively. we have 16 color images with three channels. how can I fuse 16 images and create one single  image with 16 channels.how can CNN handle images with multiple channels(more than one or three channels)? if that is possible how can I put the images in the train , validation and test folders?the input of the CNN must be just image or it can be an array of numbers?