title: Deconvolution layer in caffe
body: <p>After some reading about deconvolution in caffe, I am confused about the FCN's train.prototx <a href="https://github.com/shelhamer/fcn.berkeleyvision.org/blob/master/pascalcontext-fcn32s/train.prototxt" rel="nofollow">here</a>. The deconvolution layer's default weight filler is 'constant' and default value is zero. According to the deconvolution operation in caffe, doesn't all the output is zero in that input are multiplied by zero.</p>