Encoding method, decoding method and encoding and decoding method of micro-code array
A coding method and coding method technology, which can be applied to record carriers used in machines, electromagnetic radiation induction, instruments, etc., can solve problems such as increasing the system cost of handwritten information reading systems, and achieve the goal of eliminating uncertainty and increasing position resolution. Effect
Active Publication Date: 2012-09-19
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 requires 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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[0049] 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.
[0050] 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 an encoding method of a micro-code array, which comprises the following step: in the data area contained by a plurality of micro-code blocks in the micro-code array, drawing a plurality of micro-code points in the data area in an encoding mode of reflected Gray codes, wherein the micro-code points for representing the low bits of the reflected Gray codes are drawn at the periphery of the data area. The invention also provides a decoding method and an encoding and decoding method of the micro-code array. In the encoding method, the decoding method and the encoding and decoding method of the micro-code array of the invention, position codes are encoded and decoded by utilizing the specific change rules of the reflected Gray codes, thus a storage device is not needed to record all position codes; and the lower bits of the reflected Gray codes are drawn at the periphery of the data area to reduce the position uncertainty generated in the decoding process.
Description
technical field [0001] 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 [0002] 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. [0003] 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 configuration positions of tiny code points 9113 (microdots) in the data area 9112 of each position code 911 are different; and each position code 911 The configuration positions of the tiny code points 9113 in the header area 9111 of all are th...
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IPC IPC(8): G06K7/10G06K19/06
Inventor魏守德蔡彰哲
OwnerPIXART IMAGING INC