itorch image error on mac os x yosemite

[Frank Luo]

Trying the iTorch_demo.ipynb and got the following error:

In [1]:

require 'image';

In [2]:

itorch.image({image.lena(), image.lena(), image.lena()})

/Users/fluo/torch/install/share/lua/5.1/image/init.lua:141: cannot open file <1> for reading
stack traceback:
	[C]: in function 'load'
	/Users/fluo/torch/install/share/lua/5.1/image/init.lua:141: in function 'loader'
	/Users/fluo/torch/install/share/lua/5.1/image/init.lua:285: in function 'load'
	/Users/fluo/torch/install/share/lua/5.1/image/init.lua:1307: in function 'lena'
	[string "local f = function() return itorch.image({ima..."]:1: in function 'f'
	[string "local f = function() return itorch.image({ima..."]:1: in main chunk
	[C]: in function 'xpcall'
	/Users/fluo/torch/install/share/lua/5.1/itorch/main.lua:174: in function </Users/fluo/torch/install/share/lua/5.1/itorch/main.lua:140>
	/Users/fluo/torch/install/share/lua/5.1/lzmq/poller.lua:75: in function 'poll'
	/Users/fluo/torch/install/share/lua/5.1/lzmq/impl/loop.lua:307: in function 'poll'
	/Users/fluo/torch/install/share/lua/5.1/lzmq/impl/loop.lua:325: in function 'sleep_ex'
	/Users/fluo/torch/install/share/lua/5.1/lzmq/impl/loop.lua:370: in function 'start'
	/Users/fluo/torch/install/share/lua/5.1/itorch/main.lua:341: in main chunk
	[C]: in function 'require'
	(command line):1: in main chunk
	[C]: at 0x010dc4b330

can anyone help? The demo runs well on Ubuntu 14.04

[Leo Tam]

Have you tried reinstalling the image module?

[Kemal AYDIN]

I have the same problem.

-reinstalled image

> luarocks install image

But it doesn't work. Any updates?

[Kemal AYDIN]

image.lena()

gives the following error:

/Users/kemal/torch/install/share/lua/5.1/image/init.lua:159: [write_png_file] png_create_write_struct failed
stack traceback:
	[C]: in function 'save'
	/Users/kemal/torch/install/share/lua/5.1/image/init.lua:159: in function 'saver'
	/Users/kemal/torch/install/share/lua/5.1/image/init.lua:354: in function 'save'
	/Users/kemal/torch/install/share/lua/5.1/itorch/gfx.lua:25: in function 'image'
	[string "i = image.load('lena.jpg')..."]:2: in main chunk
	[C]: in function 'xpcall'
	/Users/kemal/torch/install/share/lua/5.1/itorch/main.lua:179: in function </Users/kemal/torch/install/share/lua/5.1/itorch/main.lua:143>
	/Users/kemal/torch/install/share/lua/5.1/lzmq/poller.lua:75: in function 'poll'
	/Users/kemal/torch/install/share/lua/5.1/lzmq/impl/loop.lua:307: in function 'poll'
	/Users/kemal/torch/install/share/lua/5.1/lzmq/impl/loop.lua:325: in function 'sleep_ex'
	/Users/kemal/torch/install/share/lua/5.1/lzmq/impl/loop.lua:370: in function 'start'
	/Users/kemal/torch/install/share/lua/5.1/itorch/main.lua:350: in main chunk
	[C]: in function 'require'
	[string "arg={'/Users/kemal/Library/Jupyter/runtime/ke..."]:1: in main chunk

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Kemal Aydin, Ph.D.
Associate Professor of Computer Science
North American University
3203 N Sam Houston Parkway W
Houston, TX 77038
(832) 230 5158