초록 ▼

An encoded symbol reading device capable of reading and decoding a tessellated symbol. A detector detects an optical image formed by the encoded symbol and outputs a signal corresponding to the optical image. The signal is compared with threshold values and a 1-bit data value is output. The 1-bit da

An encoded symbol reading device capable of reading and decoding a tessellated symbol. A detector detects an optical image formed by the encoded symbol and outputs a signal corresponding to the optical image. The signal is compared with threshold values and a 1-bit data value is output. The 1-bit data values are converted into an n-bit data value which is stored in a memory. The threshold values are also stored in memory and are obtained by detecting an optical image formed by a surface having a predetermined color.

대표청구항 ▼

[ What is claimed is:] [1.] An encoded symbol reading device for reading an encoded symbol, comprising:means for receiving an optical image of an encoded symbol and outputting an image signal corresponding to said optical image, said receiving means having a plurality of image receiving pixels, a si

[ What is claimed is:] [1.] An encoded symbol reading device for reading an encoded symbol, comprising:means for receiving an optical image of an encoded symbol and outputting an image signal corresponding to said optical image, said receiving means having a plurality of image receiving pixels, a signal representing an amount of light incident to each of said plurality of pixels being an output from said receiving means;means for generating horizontal and vertical synchronous signals;means for driving said receiving means to output said signal representing an amount of light incident to each of said plurality of pixels synchronously with said horizontal and vertical synchronous signals;means for converting each signal representing an amount of light incident to each of said plurality of pixels into an m-bit digital data, wherein m is greater than one;means for generating 1-bit digital data corresponding to each of said plurality of pixels by evaluating said m-bit digital data corresponding to each of said plurality of pixels;means for storing said 1-bit digital data generated by said generating means; andmeans for controlling said storing means to store said 1-bit digital data, addressing of said storing means being determined based on said horizontal and vertical synchronous signals.