Two-dimensional code reader

• Main Authors: INOUE KATSUSHI, KOBAYASHI KEIICHI, KANNON TETSUYA, KOJIMA YOSHIHIRO
• Format: Patent
• Language: English
• Published: 30.01.2001
• Edition: 7
• Subjects: CALCULATING; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS

A two-dimensional code reader for accurate and fast reading of a two-dimensional code image containing luminance unevenness caused by variations in illumination. To binarize cells, first the gray levels of the pixels at the center points of the cells are extracted, a local threshold value is found o...