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A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. [1] Like a flatbed scanner, it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals.
Barcode reading libraries are more complex, requiring Computer Vision techniques. However, they can be run on common camera or scanner equipped devices. The first libraries could recognize only 1D barcodes by laser scanners mode emulation.
A QR code ( quick-response code) is a type of two-dimensional matrix barcode, invented in 1994, by Japanese company Denso Wave for labelling automobile parts.
A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines.
Using an X-acto knife, he disconnected a chip containing a serial number, turning the free device into a regular bar code reader that he could use without worrying about the potential for surveillance ...
Sumatra PDF: A free (GPL), open source PDF reader based on MuPDF. It also supports DjVu, XPS, CHM, Comic Book (CBR, CBT, CBZ and CB7Z) and eBook (EPUB, FB2, FB2Z, PBD, MOBI, PBR, TCR & ZFB2), TXT and image file formats (.tga, .gif, .jpg, .j2k, .png, .webp, .tiff).