Detail Novel Signal-Processing Techniques in Barcode Scanning   Oleh:  Goren, David P. ; Pavlidis, Theo ; Shellammer, Stephen J. Jenis: Article from Bulletin/Magazine Dalam koleksi: Robotics & Automation Magazine vol. 6 no. 1 (1999), page 57-65. Topik: sistem barcode; novel; signal - processing; barcode scanning Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: RR9.4 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel Traditional barcode scanners use analog edge detectors to detect the boundaries of dark and light areas. As long as the edge strength exceeds a given threshold, the detected edge is considered to correspond to a bar / space boundary. Such a hard decision often leads to errors, especially in scanning barcodes that are poorly printed or scanned from a distance. An earlier study showed that much better results can be obtained by working directly with samples of the analog data. However, that method requires storing the entire sampled waveform of a scan line in memory, which is not cost effective. The method described in the article attempts to combine the performance advantages of processing the samples of the analog waveform with the low - cost advantage of the traditional methods. We still rely on edge - detection circuits, however, in addition to saving the edge time we also store information about the edge strength. In this way, we have been able to produce many of the benefits of the approach described in Joseph and Pavlidis (1993) with only a small increase in cost. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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