Hello Zeeshan,
You can use Lua-GD, a binding for C's gdlibrary for drawing.
You must first install gd and all it's dependencies, then install Lua-GD, as the manual says.
Here is the Lua code to do what is requested:
require 'gd'
local f = io.open('file.csv', 'w')
local img = gd.createFromPng('image.png')
for y = 1, img:sizeY() do
local line = ''
for x = 1, img:sizeX() do
local r, g, b = img:getPixel(x, y)
line = line .. r .. ', ' .. g .. ', ' .. b .. ', '
end
line = line:gsub(',$', '\n') -- remove last comma
f:write(line)
end
f:close()
Try out this code snippet.
[edit]Code block corrected[/edit]
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