Add tools/rebuild_model

tools/rebuild_model.lua

@@ -0,0 +1,43 @@
+require 'pl'
+local __FILE__ = (function() return string.gsub(debug.getinfo(2, 'S').source, "^@", "") end)()
+package.path = path.join(path.dirname(__FILE__), "..", "lib", "?.lua;") .. package.path
+require 'os'
+require 'w2nn'
+local srcnn = require 'srcnn'
+
+local function rebuild(old_model)
+   local new_model = srcnn.waifu2x_cunn(srcnn.channels(old_model))
+   local weight_from = old_model:findModules("nn.SpatialConvolutionMM")
+   local weight_to = new_model:findModules("nn.SpatialConvolutionMM")
+
+   assert(#weight_from == #weight_to)
+   
+   for i = 1, #weight_from do
+      local from = weight_from[i]
+      local to = weight_to[i]
+      
+      to.weight:copy(from.weight)
+      to.bias:copy(from.bias)
+   end
+   new_model:cuda()
+   new_model:evaluate()
+   return new_model
+end
+
+local cmd = torch.CmdLine()
+cmd:text()
+cmd:text("waifu2x rebuild cunn model")
+cmd:text("Options:")
+cmd:option("-i", "", 'Specify the input model')
+cmd:option("-o", "", 'Specify the output model')
+cmd:option("-iformat", "ascii", 'Specify the input format (ascii|binary)')
+cmd:option("-oformat", "ascii", 'Specify the output format (ascii|binary)')
+
+local opt = cmd:parse(arg)
+if not path.isfile(opt.i) then
+   cmd:help()
+   os.exit(-1)
+end
+local old_model = torch.load(opt.i, opt.iformat)
+local new_model = rebuild(old_model)
+torch.save(opt.o, new_model, opt.oformat)