Exactly, this is only one feature map. then i should apply this process to all other feature maps generated by a particular convolution layer.
I need to extract the min and max values of each feature map so i can identify the range of values each feature map consist of. Doing so, will assist me to figure out the range of values that each feature map consist of. then after, i can do enhancement process to those feature maps with the assist of the derived information.
as a result, i will get new feature maps with new pixel values i set through other equations that emphasis on foreground pixels and suppress background ones.