CN1106555A - Eight-diagram bar code - Google Patents
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- CN1106555A CN1106555A CN 93112951 CN93112951A CN1106555A CN 1106555 A CN1106555 A CN 1106555A CN 93112951 CN93112951 CN 93112951 CN 93112951 A CN93112951 A CN 93112951A CN 1106555 A CN1106555 A CN 1106555A
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Abstract
The bar code designed on the basis of Chinese "the Eeight Diagrams" features that its basic bar code structure is a long straight bar that is divided into three or six spaces and each of spaces may be black or white, resulting in its simplicity and no line and space error. It overcomes the shortcomings of curopean-american bar code.
Description
The present invention relates to a kind of bar code, particularly relate to a kind of eight-diagram bar code.
The different bar code systems that countries in the world are used with all trades and professions though all be not quite similar in order to the mode of coding, all be that tenderly white, thick white, thin black and thick parallel lines such as black is formed basically, and utilize the specification that belongs to them, are made for the foundation when encoding; In principle, see also shown in Figure 1, each character is black and four white compositions with five, but because the not necessarily width between secret note and informal voucher is subjected to the restriction of the operating characteristic of each code reader (BARCRED READER), be difficult to accomplish absolutely accurate during design, no matter so be that U.S.'s bar code plan is entered association (UPC) or European bar code plan is advanced system's bar code of association (EAN), its character kenel is few, and figure is bigger, major part is used in the supermarket, and can't be widely used on the extensive affairs.
Fundamental purpose of the present invention is to provide a kind of naked eyes to get final product identification, simple and easy and free from error eight-diagram bar code.
Secondary objective of the present invention is to provide that a kind of derivation is infinite, usable range eight-diagram bar code widely.
The present invention is described in detail below in conjunction with drawings and Examples:
Fig. 1 is a bar-code structure in the past.
Fig. 2 is the block hardware diagram of eight-diagram bar code coding of the present invention.
Fig. 3 is the basic bar-code structure synoptic diagram of eight-diagram bar code first embodiment of the present invention.
Fig. 4 is an eight-diagram bar code of the present invention, the process flow diagram of its Chinese numerical coding program.
Fig. 5 is an eight-diagram bar code of the present invention, wherein the process flow diagram of pure digi-tal coded program.
Fig. 6 is the block hardware diagram of eight-diagram bar code decoding of the present invention.
Fig. 7, the 8th, the manufacturing synoptic diagram of the basic bar-code structure of eight-diagram bar code second embodiment of the present invention.
Fig. 9 is all the interior bar-code structures circles of the civilian numerical data base of eight-diagram bar code first embodiment of the present invention and the table of comparisons of character.
Figure 10 is all interior bar-code structure figure complete lists of pure digi-tal database of eight-diagram bar code first embodiment of the present invention.
Figure 11 is eight-diagram bar code first embodiment of the present invention, the part pure digi-tal bar-code structure figure that wherein prints and the decade arabic numeral table of comparisons.
Figure 12 is the basic bar-code structure complete list of Fig. 3.
Figure 13 is eight-diagram bar code second embodiment of the present invention, the table of comparisons of decade numerical value, bar-code structure and computer logical code.
Figure 14 is eight-diagram bar code second embodiment of the present invention, the table of comparisons of hexadecimal numerical value, bar-code structure and computer logical code.
Figure 15 is eight-diagram bar code second embodiment of the present invention, the table of comparisons of part character, bar-code structure and the computer logical code that is combined into two different basic bar-code structures.
Before thousands of year the ancestor with the universe, female, from, bank, xun, one of the Eight Diagrams, convert, eight divinatory symbol such as blunt, shake drill and translate 64 relationship, with the staggered collocation of the heavy divinatory symbol system that the forms literary composition of recording; The divinatory symbol reason itself is that a kind of the chatting that big thousand cosmos develop also is the symbol of number reason in fact.
The inventor starts according to " female " divinatory symbol, the Tuan commentary on meaning of different diagrams in The Book Changes is said: " supporting life to female first all things on earth is along holding the sky ", because of female divinatory symbol are the mother of all things on earth, and the divinatory symbol figure that attainments are joined is closed in the two companion negative and positive world, give computer technologyization, the research and design computer can print record and can scan the eight-diagram bar code of using.
Seeing also shown in Figure 2ly, is the block hardware diagram of eight-diagram bar code of the present invention coding, and it comprises storage arrangement 10, one CPU (central processing unit), 11, one keyboards 12 and a display 13 substantially; Wherein storage arrangement 10 storage inside have four kinds of basic bar-code structures and a database, in one embodiment, basic bar-code structure comprises one first basic bar-code structure 100, one second basic bar-code structure 101, the 3rd basic bar-code structure 102 and one the 4th basic bar-code structures 103; Please cooperate Fig. 3 and shown in Figure 12, wherein the bar code graphics of the first basic bar-code structure 100 is " | ", and its four carry logics numerical value is " 1 ", and the computer logical code is " 111 "; The bar code graphics of the second basic bar-code structure 101 be "
", its four carry logics numerical value is " 2 ", and computer logical code " 101 "; The bar code graphics of the 3rd basic bar-code structure 102 be "
", its four carry logics numerical value is " 3 "; And the computer logical code is " 100 "; And the bar code graphics of the 4th basic bar-code structure 103 be "
", its four carry logics numerical value is " 4 ", and the computer logical code is " 001 "; And database also comprises a civilian numerical data base and a pure digi-tal database, and its Chinese numerical data base sees also shown in Figure 9, in the present embodiment, the all corresponding above-mentioned four kinds of basic bar-code structures of each character, and combine with three basic bar-code structures wherein, it can form 4
3=64 kinds of literary composition numerals; The then corresponding above-mentioned four kinds of basic bar-code structures of pure digi-tal database combine according to four carry logics, as shown in figure 10.In Fig. 3, also include stroke demal bar-code structure 104, its bar code graphics be "
1", four carry logic numerical value are " 5 ", and the computer logical code is " 010 ", and as the identification dividing line of civilian numeral and pure digi-tal; If a string bar code is all the literary composition numeral, or is all pure digi-tal, then do not need to divide sign indicating number, if but before pure digi-tal, be added with prefix (i.e. literary composition numeral), then must use and divide sign indicating number.When encoding, at first CPU (central processing unit) 11 will show that various coding patterns are for using selection by display 13, the coding that wherein is all literary composition numeral or is all pure digi-tal as mentioned above, now after if the user selects to add the coding of prefix before the pure digi-tal, when beginning to encode, the user i.e. the civilian digital prefix of input earlier, and after pressing space (SPACE) key behind the last prefix and staying a space, import pure digi-tal again, so, after having compiled sign indicating number, the space behind original prefix will be compiled with the stroke demal and be substituted, and promptly finish the coding that adds prefix before the pure digi-tal; And when decoding divided the dividing line identification that sign indicating number is prefix and pure digi-tal.In view of the above, will divide code-bar code structure 104 and have five bar-code structures, when being used in civilian numerical coding, can form 5 by any three bar-code structures with above-mentioned four basic bar-code structure 100-103
3=125 kinds of literary composition numerals; Also can form 5 by any four bar-code structures
4=625 kinds of literary composition numerals.And be used in pure digi-tal when coding, then can combine according to five carry logics.
In like manner, we can also adopt "
1", "
1" ... wait bar-code structure, and produce more literary composition numeral, and logics such as six carries, seven carries are formed the coding of pure digi-tal.
CPU (central processing unit) 11 includes a civilian numerical coding program and a pure digi-tal coded program at least, its Chinese numerical coding program, shown in the flow process of Fig. 4, behind program start, the user can key in the literary composition numeral by above-mentioned keyboard 12, this moment, CPU (central processing unit) 11 was about to the civilian numerical data base that civilian numeral is weaved into computer code input store device 10, accessed the bar code graphics of corresponding code.For example use to key in literary composition numeral " A ", A then is encoded into " 111111101 " through CPU (central processing unit) 11, and from storage arrangement 10 access " ||
" bar code graphics, be shown in the supervision screen of display 13 simultaneously with character A, the also replaceable one-tenth printer of display 13 certainly, and directly the character A of bar code graphics and below being printed, as shown in Figure 9.According to statistics, civilian digital bar code graphics is not current if do not contain prefix (literal) with numeral (0-9) kenel, and the generation of its mistake has following four big classes: transcribe (1); (2) single conversion; (3) two conversions; (4) at random; And the present invention adopts the flexible strategy method for cooperating four carry logics, respectively multiply by flexible strategy 1,2,3,4,1,2,3,4 according to bar code designation order, below analogizes.For example with the input of literary composition numeral " 2 ", " 5 ", " 1 ", then the mode of program generation check code is as follows:
Literary composition numeral 251
× × ×
Flexible strategy 123
2 +10 +3 = 25
End several 5 is check code, so then printer will print:
Last three bar codes are check code, in view of the above, if the user is 252 with 251 keys because of carelessness, get 2 * 1+5 *+2 * 3=18 according to the flexible strategy method, check code be 8, so it is wrong to detect its data by check code when deciphering.
The pure digi-tal coded program, then shown in the flow process of Fig. 5, behind program start, can key in any decimal arabic numeral via keyboard 12 uses, program will judge that whether the arabic numeral of input are less than 5 then, if then CPU (central processing unit) 11 directly is considered as switched four carry logic numerical value, weave into the pure digi-tal database of computer code input store device 10 according to numerical value, access the bar code graphics of corresponding code.For example import arabic numeral " 2 ", 11 of CPU (central processing unit) directly are considered as four carry logic numerical value " 2 ", are encoded into " 101 ", and from storage arrangement 10 access "
" bar code graphics be shown in the supervision screen of display 13; And if the input arabic numeral more than or equal to 5, then numeral is subtracted 1 back divided by 4, get the quotient and first remainder, and then with quotient divided by 4 second remainder, so up to quotient smaller or equal to 4, again the most last quotient and gained remainder are arranged in order from left to right " the most last quotient; ...; second remainder; first remainder ", again the most last quotient and each remainder are added that 1 promptly gets one or four carry logic numerical value at last, numerical value will be compiled to computer code, and in storage arrangement 10, access the bar code graphics of corresponding code, simultaneously the arabic numeral of input are logined in the bar code graphics below.For example, be example with input arabic numeral " 596 ", the result is as follows:
(1) 596-1=595
(2)
(3)
2 1 1 0 3
+ 1 1 1 1 1
32214 → four carry logic numerical value
(4) be encoded into 100 101 101 111 001
(5) access bar code graphics
By last example as can be known, when the user from keyboard 12 input arabic numeral 596, by the present invention can obtain from display 13 "
" bar code graphics, be shown in above-mentioned bar code circle below with 596 simultaneously.With above-mentioned, when using the pure digi-tal coding, the user also can replace display 13 by printer, and the arabic numeral of bar code graphics and below are directly printed, as shown in figure 11.
The present invention can be behind coding add on the bar code graphics left side initial code " | " and the right add a stop code "
", to distinguish the standard of bar code graphics when reading yard.
See also shown in Figure 6ly again, the block hardware diagram for eight-diagram bar code of the present invention decoding comprises above-mentioned storage arrangement 10, CPU (central processing unit) 11 and display 13; Mainly also comprise an optical sensor 14, and above-mentioned CPU (central processing unit) 11 also includes a civilian digital decoding program and a pure digi-tal decoding program, and with the above-mentioned bar code graphics through printing of optical sensor 14 inductions, bar code graphics with induction reaches above-mentioned CPU (central processing unit) 11 again, and judge it is to belong to civilian digital bar code graphics by CPU (central processing unit) 11, or be the pure digi-tal bar code graphics, if civilian digital bar code graphics promptly starts civilian digital decoding program, after receiving above-mentioned initial code " | ", the bar code graphics that connection is received is a unit with per three bar codes, civilian numerical data base in the corresponding above-mentioned storage arrangement 10, the civilian numeral of correspondence is shown in the supervision screen of display 13, up to stop code "
" till the appearance.For example the civilian digital bar code graphics of optical sensor 14 induction be "
", wherein first sign indicating number is an initial code, last code is a stop code, is the unit with per three bar codes therebetween, is respectively
, promptly obtain literary composition numeral " GOOD " after the deciphering.If again "
", obtain literary composition numeral " 2515 " after the deciphering, because digital kenel should be literary composition numeral " 251 " as can be known, the last number " 5 " is a check code.
And if the pure digi-tal bar code graphics then starts the pure digi-tal decoding program, the steps include: (one) acquisition initial code | and stop code
Between bar code graphics, the four carry logic numerical value that access corresponding bar code graphics in the pure digi-tal database of above-mentioned storage arrangement 10 are arranged; (2) each numerical value is subtracted 1; (3) start at the n position and multiply by 4 by the right side according to each numerical value again
(n-1)Obtain decimal arabic numeral; (4) the decimal arabic numeral addition that each numerical value in (three) is obtained; And (five) add 1 with the arabic numeral of (four) addition gained again.Now be exemplified below: for example the pure digi-tal bar code graphics of optical sensor 14 induction for "
":
(1) wherein first sign indicating number is an initial code, and last code is a stop code, therebetween
Pairing four carry logic numerical value are " 3 ", " 2 ", " 1 ", " 4 ".
(2)
3 2 1 4
- 1 1 1 1
2 1 0 3
(3) 2 * 4
2=128;
1×4
2＝16;
0 * 4
1=0; And
3×4
0＝3。
(4) 128+16+0+3=147
(5) 147+1=148.
In this way, promptly obtain pure digi-tal " 148 " after the deciphering.
Comprehensive above-mentioned its coding of structure, decoding process, the application that can obtain a practicality is as follows:
Suppose that certain person is numbered G100043075 at the I.D. unification, utilizes above-mentioned code device to become with civilian numerical coding:
The simple and easy intelligent bar codes of 35 line multi-functions are formed altogether, are used in when printing and can set the bar code interval via density, make whole bar code graphics length be equivalent to original civilian digital length, the seal record below the photograph of I.D. front or other identification with the interface sheet on; Only need utilize the above-mentioned bar code graphics that prints of above-mentioned optical sensor 14 scannings during deciphering, see through above-mentioned decoding device and can demonstrate one group of digital G1000430754 of literary composition on the screen monitoring, the last several 4 is the check codes that produce with above-mentioned flexible strategy method, that is:
1 0 0 0 4 3 0 7 5
× × × × × × × × ×
1 2 3 4 1 2 3 4 1
1+ 0+ 0+ 0+ 4+ 6+ 0+ 28+ 5 = 44
Its check code is 4.
In a second embodiment, the basic bar-code structure of eight-diagram bar code of the present invention, it is characterized in that organizing basic bar-code structure is six spaces that separate into six five equilibriums with a long vertical bar sign indicating number, and sets work in each space and deceive/reach in vain entirely; See also shown in Fig. 7,8, wherein the grid of Fig. 7 is depicted as one 24 * 24 coinage district, one preferred embodiment is the coinage space with per 8 behaviors, one basic bar-code structure, as shown in Figure 8, in Fig. 8, get 2 row 4 again and classify a setting unit as, wait the branch space to separate out six sections, and set black (1) or complete white (0) to produce 2 in six sections spaces
6=64 kinds of different basic bar-code structures.
In like manner, if represent a pure digi-tal with each basic bar-code structure, then present embodiment can be used in the computing of 64 carries, also can carry out certainly any carry below 64 (decade, as shown in figure 13; Or hexadecimal, computing as shown in Figure 6).Wherein also not compiling at interior basic bar-code structure " 001100 " with one among table five and Figure 14 is the stroke demal, and is operand symbols such as a decimal point coding with another basic bar-code structure " 010010 ".
In the literary composition numeral, i.e. the coinage of character, with 0,1,2,3,4,5,6,7,8,9 of above-mentioned Figure 13, A, B, C, D, E, 16 basic bar-code structures such as F are combined as example, then can comprise:
1. be combined into a character with two different basic bar-code structures, can produce 256(16 * 16 altogether) individual character.
2. be combined into a character with three different basic bar-code structures, can produce 4095(16 * 16 * 16 altogether) individual character.
3. be combined into a character with four different basic bar-code structures, can produce 65536(16 * 16 * 16 * 16 altogether) individual character.
Shown in Figure 15, be above-mentioned part character and the bar-code structure thereof that is combined into two different basic bar-code structures.So by above-mentioned basic bar-code structure, those skilled in the art promptly can set out pure digi-tal bar-code structures such as decade, hexadecimal, and define different civilian digital bar-code structures.
In conjunction with above-mentioned structure and coding, decoding process, it is as follows that we can obtain the application of a practicality:
Suppose that certain person is numbered A102310493 at the I.D. unification, utilizes above-mentioned code device can be encoded into:
1. when being all the literary composition numeral:
Ten characters of A102310493, each all has 2 basic bar codes, comprises an initial code, a stop code and a check code, and totally 23 basic bar-code structures are formed.
2. when adding the coding of prefix before the pure digi-tal:
Wherein A is a character, has 2 basic bar codes; 102310493 respectively is pure digi-tal, respectively has 1 basic bar code, comprises that again one is divided sign indicating number, an initial code, a stop code and a check code, and totally 15 basic bar-code structures can be formed.
Therefore, be used in and print when above-mentioned I.D. is unified numbers, can set the bar code interval via density, make whole bar code graphics length be equivalent to add the length that prefix is encoded before original text numeral or the pure digi-tal, the seal record is below the photograph of I.D. front or on other identification usefulness interface sheet; Only need utilize the above-mentioned bar code graphics that prints of above-mentioned optical sensor 14 scannings during deciphering, see through and to add prefix type A10314933 above-mentioned decoding device can demonstrate one group of literary composition numeral or pure digi-tal on monitoring screen before, the last several 3 is the check codes that produce with above-mentioned flexible strategy method.
So, eight-diagram bar code of the present invention is derived infinite, and life and growth in nature embraces a wide spectrum of ideas, collection wherein to the greatest extent, then can continue civilian numeral of procreation and pure digi-tal voluntarily according to above-mentioned coded system, and can select different bar codes according to heterogeneity, different purposes, and do not worry that character is not enough or make mistakes, go up the affairs of household registration to government bodies, the ballot paper bar code processing of various elections is write letter down to company's row commodity price and general family and to be posted area code bar processing etc.Any unit of all use computers and optics OCR reading machine, any scope case all can be integrated both data messages by the intelligent bar code of multifunction simple as bridge, reach simple and easy and error free and derivation infinite, usable range is purpose widely.
In sum, eight-diagram bar code of the present invention really can reach the considerable enhancement of the purpose and the effect of invention by above-mentioned disclosed structure.
Claims (8)
1, a kind of eight-diagram bar code comprises one group of basic bar-code structure, it is characterized in that: bar-code structure is three spaces that separate into the upper, middle and lower five equilibrium with a long vertical bar sign indicating number substantially, and deceives entirely/reach in vain entirely in each space setting.
2, a kind of eight-diagram bar code, it is characterized in that: the seat appearance figure of compound Eight Diagrams on the compass is changed into computer acceptable standing position bar code graphics, and the standing position bar code graphics drilled be translated into six spaces that separate into six five equilibriums with a long vertical bar sign indicating number, and set in each space complete black/complete white basic bar-code structure.
3, a kind of eight-diagram bar code comprises: a storage arrangement, and it also comprises:
One pure digi-tal database is stored with pure digi-tal numerical value, and corresponding numerical value bar-code structure of numerical value and computer logical code; And
-Wen numerical data base stores civilian digital character in it, and corresponding character bar-code structure of character and computer logical code;
-keyboard comprises at least:
One group of cardinar number keyboard is one group of decimal alpha-numeric keys; And
One group of literary composition numerical key, the wherein character in the corresponding described civilian numerical data base of each civilian numerical key;
One CPU (central processing unit) includes at least:
One pure digi-tal coded program, it accepts the decade arabic numeral signal of the cardinar number keyboard input of described keyboard, to convert the receptible computer logic of described storage arrangement code name to, again according to the pure digi-tal database of computer logic code name, to capture corresponding numerical value bar-code structure output to storage arrangement; And
One civilian numerical coding program, it accepts the civilian digital signal of the civilian numerical key input of described keyboard, to convert the receptible computer logic of described storage arrangement code name to, again according to the civilian numerical data base of computer logic code name, to capture corresponding character bar-code structure output to memory storage; And
One display, and the character bar-code structure/numerical value bar-code structure of described CPU (central processing unit) output can be shown thereon.
4, eight-diagram bar code as claimed in claim 3 is characterized in that: display can also substitute by printer, and the character bar-code structure/numerical value bar-code structure of described CPU (central processing unit) output is directly printed.
5, as claim 3 or 4 described eight-diagram bar codes, it is characterized in that: CPU (central processing unit) also comprises together up to coded program, and can be when output described character bar-code structure/numerical value bar-code structure, produce an initial code and rightmost produces a stop code at the bar code graphics Far Left, to distinguish the standard of bar code graphics when reading yard.
6, as claim 3 or 4 described eight-diagram bar codes, it is characterized in that: the civilian numerical code program of CPU (central processing unit) also comprises a check code coded program, and can be when the described character bar-code structure of output, character bar-code structure in numeral (not containing literal) partly produces a check code bar-code structure, lists in the right of described character bar-code structure.
7, as claim 3 or 4 described eight-diagram bar codes, also comprise stroke demal bar-code structure, to be used in the coding that adds literal before the pure digi-tal.
8, a kind of eight-diagram bar code comprises:
One storage arrangement, it further comprises:
One pure digi-tal database is stored with pure digi-tal numerical value, and corresponding numerical value bar-code structure of numerical value and computer logical code; And
One civilian numerical data base stores civilian digital character in it, and corresponding character bar-code structure of character and computer logical code;
One optical sensor, it is in order to responding to once the character that prints/numerical value bar-code structure, and exports one character/numerical value bar-code structure signal;
One CPU (central processing unit), character/numerical value bar-code structure signal that it accepts described optical sensor output includes at least:
One civilian digital bar code decoding program, it accepts the character bar-code structure signal of described optical sensor output, to convert the receptible computer logic of described storage arrangement code name to, again according to the civilian numerical data base of computer logic code name, to capture the digital character output of corresponding literary composition to storage arrangement; And
One pure digi-tal bar code decoding program, it accepts the numerical value bar-code structure signal of described optical sensor output, to convert the receptible computer logic of described storage arrangement code name to, again according to the pure digi-tal database of computer logic code name, to capture corresponding pure digi-tal numerical value output to storage arrangement; And
One display, and the civilian digital character/pure digi-tal numerical value of described CPU (central processing unit) output can be shown thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93112951A CN1086824C (en) | 1993-12-20 | 1993-12-20 | Eight-diagram bar code |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93112951A CN1086824C (en) | 1993-12-20 | 1993-12-20 | Eight-diagram bar code |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1106555A true CN1106555A (en) | 1995-08-09 |
| CN1086824C CN1086824C (en) | 2002-06-26 |
Family
ID=4990319
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93112951A Expired - Fee Related CN1086824C (en) | 1993-12-20 | 1993-12-20 | Eight-diagram bar code |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1086824C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089178C (en) * | 1995-03-16 | 2002-08-14 | 东芝株式会社 | Bar code encoding system using four-state codes |
| CN113378197A (en) * | 2021-06-22 | 2021-09-10 | 西安理工大学 | Color digital image encryption method based on weight trigram coding and decoding rule |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI482096B (en) * | 2013-01-07 | 2015-04-21 | Dinkle Entpr Co Ltd | Method and device for optical information recording, recording medium so recorded and device to read such recorded information |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4833609A (en) * | 1987-06-18 | 1989-05-23 | Ncr Corporation | ERC with operator prompting for entering quantity of selected multi-item packaged goods |
| CN1011924B (en) * | 1988-07-26 | 1991-03-06 | 北京市邮政科学研究所 | Bar code identification processing system |
-
1993
- 1993-12-20 CN CN93112951A patent/CN1086824C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089178C (en) * | 1995-03-16 | 2002-08-14 | 东芝株式会社 | Bar code encoding system using four-state codes |
| CN113378197A (en) * | 2021-06-22 | 2021-09-10 | 西安理工大学 | Color digital image encryption method based on weight trigram coding and decoding rule |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1086824C (en) | 2002-06-26 |
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