From: Kamaljeet Saini <kamaljeet_singh_saini@...>
Date: 2009-02-05T06:05:22+09:00
Subject: Re: Converting binary image file to bmp file using RMagick2.0

Hi,

The attached binary file is not displays image correctly and looks like 
pixel shift is required. If i can get help on this please.

require 'rmagick'
file_name = "C:/Hubimage1.txt" # the binary file
image_file_name = "C:/Hubimage1.bmp" # the expected file to be generated
image = Magick::Image.new(800, 480)
file = File.open(file_name,"rb").read

one = []
two = []
three = []

file.unpack('S*').each { |x|
  one << (((x & 0xF800) >> 11) << 3)
  two << (((x & 0x7E0) >> 5) << 2)
  three << ((x &0x1F)<< 3)
}
bufferscreen_height=480
bufferscreen_width=800
k=0
for i in 0...bufferscreen_height
  for j in 0...bufferscreen_width
    q=Magick::Pixel.new(one[k],two[k],three[k],0)
    image.pixel_color(j,i,q)
    k += 1
 end
end

image.write(image_file_name)

Attachments:
http://www.ruby-forum.com/attachment/3260/Hubimage1.zip

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