Method for decoding micro code array
A decoding method, tiny technology, applied in decoding and encoding and decoding, encoding field, to increase the position resolution, eliminate uncertainty, reduce the effect of position uncertainty
Active Publication Date: 2014-09-17
PIXART IMAGING INC
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Problems solved by technology
However, the existing handwritten information reading system has at least the following problems: (1) a larger storage space is required to store all the position codes 911 in the tiny code array for the processing unit to perform image comparison; (2) the image The sensor 921 must be able to capture at least one complete image of the position code 911 at any time for image comparison, so the image sensor 921 needs a larger-sized sensing array (sensing array)
However, these system requirements will increase the system cost of the handwritten information reading system
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[0052] In order to make the above and other objects, features and advantages of the present invention more apparent, a detailed description will be given below with reference to the accompanying drawings. In addition, it should be noted that in the description of the present invention, the same members are denoted by the same symbols.
[0053] First, the characteristics and formation method of one set of reflected Gray codes will be described. Please refer to image 3 As shown, it shows the formation method of a group of 4-bit reflective Gray codes. The basic properties of reflective Gray codes include: (1) Any two adjacent reflective Gray codes only have a difference of one bit, that is, the Hamming distance (hamming distance) between the two adjacent reflective Gray codes is 1; one of the two adjacent reflection Gray codes is an odd reflection Gray code, and the other is an even reflection Gray code, wherein an odd reflection Gray code contains an odd number of digital bit...
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The invention provides a decoding method of a tiny code array and an encoding and decoding method of the tiny code array. The decoding method of the microcode array includes: scanning the microcode array to form an image; judging whether the image contains a complete direction coordinate code; when the image contains a complete direction coordinate code, then determining the image according to the direction coordinate code decoding Located at the coordinates of the tiny code array; when the image does not contain a complete direction coordinate code, then perform the following steps: divide the image into a plurality of tiny code point groups according to the header area of each tiny code block; The header area of the code square forms the small code point groups belonging to the same direction coordinate code in two adjacent columns into the coordinate code before reorganization; the small code point groups belonging to different small code squares in the coordinate code before recombination The positions are exchanged to form a recombined coordinate code; and the coordinates of the image in the microcode array are determined by decoding the recombined coordinate code.
Description
[0001] This application is a divisional application of the Chinese invention patent application 200910135538.2 filed on April 21, 2009, entitled "Encoding method, decoding method, and encoding and decoding method of microcode array". technical field [0002] The present invention relates to an encoding method, a decoding method and an encoding and decoding method, in particular to an encoding method, a decoding method, and an encoding and decoding method of a tiny code array. Background technique [0003] Please refer to figure 1 As shown, it shows an existing handwritten information reading system, which includes a read-write medium 91 and a scanning device 92 . A microcode array is formed on the read-write medium 91, and the array includes a plurality of position codes 911 whose size can be ignored visually. [0004] Please refer to Figure 2a and Figure 2b As shown, each position code 911 usually includes a header area 9111 and a data area 9112, wherein the config...
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IPC IPC(8): G06K7/10G06K19/06
Inventor魏守德蔡彰哲
OwnerPIXART IMAGING INC