Issues in scanning generated pdf417 barcode

[PiyushChandra]

Additional information for #47
I have added a sample program in Pdf417Barcode

Here is sample program I am using
code file

barcode_data = "Test Barcode"
postal_barcode = Barby::Pdf417.new(barcode_data)
image = Barby::PngOutputter.new(postal_barcode).to_png
File.open('barcode.png', 'w'){|f| f.write image }

you can check generated barcode

I am able to scan barcode generated by java library using
java Pdf417lib test_barcode.ps "Test Barcode"

OS : Mac OS X Yoesmite 10.10.3
Jruby version : jruby 1.7.20 (1.9.3p551) 2015-05-04 3086e6a on Java HotSpot(TM) 64-Bit Server VM 1.8.0_25-b17 +jit [darwin-x86_64]
Gems Used

for verifying I am using this site Online Barcode Decoder

and Barcode scanners by manatee Works on my android phone

[PiyushChandra]

Finally found the issue. In Pdf417 class in encoding method while parsing the byte stream we have to remove first bit from output of sprintf("%08b", (byte & 0xff) | 0x100) .

I have overriden encoding method of Pdf417 class to solve it. Here is my implementation

byte stream before removing first bit
111111111101010100101111101101001111110110101100001100100011101101011100100001111111101000110100100

byte stream after removing first bit
1111111101010100011111010100111110110101000011000001110101011100000011111110100010100100

now i am able to scan the generated barcode.

[Petr Kaleta]

Had same issue +1 for superb solution!!!!

Kudos Piyushchandra1987