CN104954773B - Color overlaid decoding method - Google Patents

Abstract

A kind of color overlaid decoding method, the method comprising the steps of：Receive a chrominance signal；Determine the corresponding chromaticity coordinates of the chrominance signal and be superimposed demal；According to the chromaticity coordinates for determining, the chrominance signal for receiving is carried out into coordinate decomposition, the coordinate figure of each pixel of the chrominance signal is obtained；According to the superposition demal for determining, each coordinate figure of the chrominance signal is parsed, the corresponding intensity coding of each coordinate figure is obtained；And each intensity coding is digitized, obtain corresponding digital coding.The present invention can realize the encoding and decoding of communication signal by chromaticity coordinates and colouring intensity and with superimposing technique.

Description

Color overlay codec method

technical field

The present invention relates to a codec method, in particular to a color superposition codec method.

Background technique

In the past, quite a few modulation techniques were invented for the information transmission of communication signals, such as AM (Amplitude Modulation, amplitude modulation), FM (Frequency Modulation, frequency modulation), FSK (Frequency-shift Keying, frequency shift keying), QAM (Quadrature Amplitude Modulation, Orthogonal Amplitude Modulation), OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing), etc. It is mainly to adjust the amplitude of the electromagnetic signal in the time domain and frequency domain to achieve the purpose of communication. In addition, the light wave (color) signal contains many pixels, and each pixel displays a different color, which can be used to transmit a large amount of information. However, this communication modulation method has not been fully developed.

Contents of the invention

In view of the above, it is necessary to provide a color superposition encoding and decoding method, which can realize the encoding and decoding of communication signals by using color coordinates and color intensity and using superposition technology.

The coding process of the color superposition coding and decoding method includes the steps of: determining the color coordinates to be used for coding the communication information; determining the superimposition sub-codes to be used for coding the communication information; Each coordinate of a pixel selects the corresponding superposition code to form the intensity code of each coordinate; the intensity code of each coordinate is superimposed to obtain each coordinate value of each pixel of the color signal; and according to the coordinate value of each pixel in the color coordinate The color represented in , generates a color signal.

The decoding process of the color superposition encoding and decoding method includes the steps of: receiving a color signal; determining the color coordinate and superposition code corresponding to the color signal; decomposing the received color signal according to the determined color coordinate to obtain the color The coordinate value of each pixel of the signal; according to the determined superposition code, analyze each coordinate value of the color signal to obtain the intensity code corresponding to each coordinate value; and digitize each intensity code to obtain the corresponding digital code.

Compared with the prior art, in the color superposition coding and decoding method, the amount of information contained in the color signal obtained after coding is greatly increased compared with the digital signal, and the color signal uses light as the transmission medium, which provides information transmission in the communication network. A new option of the way.

Description of drawings

Fig. 1 is a flow chart of the decoding process of a preferred embodiment of the color superposition encoding and decoding method of the present invention.

Fig. 2 is a flow chart of the coding process of the preferred embodiment of the color superposition coding and decoding method of the present invention.

Fig. 3 is a schematic diagram of RGB color coordinates.

FIG. 4 is a schematic diagram of a color signal of a simple RGB three-color mixture.

Fig. 5 is a schematic diagram of superimposing the intensity coding of the R coordinate of each pixel of a color signal.

FIG. 6 is another representation of FIG. 1 .

Description of main component symbols

sensor 10 filter 20 monitor 30 color signal 100 Color coordinates 102 R coordinate value 104 G coordinate value 106 B coordinate value 108 overlay part code 110 intensity coding 112, 114, 116 digital code 118, 120, 122 communication information 124

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

A color superposition encoding and decoding method according to an embodiment of the present invention realizes encoding and decoding of communication signals by using color coordinates and color intensity and using superimposition technology. The coded communication signal uses light as a transmission medium, providing a new option for information transmission in the communication network.

Referring to FIG. 1 , it is a flow chart of the decoding process of a preferred embodiment of the color superposition encoding and decoding method of the present invention.

Step S10, using the sensor 10 to receive a color signal. In this embodiment, the color signal is obtained by encoding the communication information to be expressed according to a color coordinate and a predetermined superposition code. The color signal is a color matrix including multiple pixels, and each matrix point (that is, each pixel) represents different communication information through different colors. The color of each matrix point is obtained by superimposing the color intensity in the color coordinates according to the superposition code.

The specific encoding process is as follows (see Figure 2):

First, the color coordinates to be used for encoding the communication information are determined (step S202). There are different coordinate description methods for color space. Now commonly used color coordinates include XYZ, RGB, LUV, etc. With color coordinates, a point can be determined on the chromaticity diagram, and this point can accurately represent a color. In this embodiment, RGB (red, green and blue) color coordinates (refer to FIG. 3 ) are selected as an example for illustration. In RGB color coordinates, each color can be represented by three variables: the intensity of red (that is, the R coordinate value), the intensity of green (that is, the G coordinate value), and the intensity of blue (that is, the B coordinate value).

The color signal obtained by encoding according to the RGB color coordinates only uses three colors of red, green, and blue, and mixes them in different proportions (color intensity) in each pixel to present different colors. Referring to FIG. 4 , it is a schematic diagram of a simple RGB three-color mixed color signal. Among them, the red, green, and blue colors have only two color intensities of 0 and 150, and these three colors are mixed in each pixel with any one of the color intensities.

Then determine the superposition sub-code to be used for encoding the communication information (step S204). The superposition sub-code is a group of detachable and identifiable number sets, wherein the sum of the numbers of any sub-set is not equal to any number in the set, and the sum of any two sub-sets is not equal. For example {1,2,4,8,16,32,...}, {1,3,5,7,17,34,...}, etc. Randomly select y numbers (where 0≦y≦i) from a set of i numbers of superimposed codes {n(i)} to form an intensity code. And all the numbers in the intensity code are added together, and the obtained value can be used to represent a coordinate value in the color coordinate. In this embodiment, each number in the superposition code corresponds to a binary bit of the digital code, for example, the four numbers 1, 2, 4, and 8 in the superposition code {1, 2, 4, 8} correspond to digitization Four binary bits that encode 1111. Therefore, the strength code composed of y superimposed sub-codes can correspond to a digital code to express a communication information.

According to the digital coding of the communication information, select the corresponding superimposed code for each coordinate (R coordinate, G coordinate, B coordinate) of each pixel of the color signal to form the intensity code of each coordinate (step S206 ). For example, three numbers 1, 2, and 8 are selected from the superposition code {1, 2, 4, 8} to form the intensity code {1, 2, 8} of the R coordinate.

Then superimpose the intensity codes of each coordinate to obtain each coordinate value of each pixel of the color signal (step S208 ). Referring to FIG. 5 , it is a schematic diagram of superimposing the intensity coding of the R coordinate of each pixel of a color signal. Among them, the intensity of the R coordinate of the first pixel is encoded as {2,4,8,16}, and the R coordinate value of the first pixel is obtained after superimposition 2+4+8+16=30 (that is, the red intensity is 30); The intensity of the R coordinate of the second pixel is encoded as {1,2,8}. After superimposition, the R coordinate value of the second pixel is 1+2+8=11 (that is, the red intensity is 11), and so on.

Finally, a color signal is generated according to the color represented by the coordinate value of each pixel in the color coordinate (step S210 ).

Returning to Fig. 1, step S12 is to determine the color coordinates and superposition codes corresponding to the color signal, that is, to determine which color coordinates and which group of superposition codes the color signal is encoded on. For example, it is determined that the color coordinates corresponding to the color signal are RGB color coordinates, and the superposition codes are {1, 2, 4, 8, 16, 32}. The information about the color coordinates and the correspondence between the superimposed code and the color signal can be pre-stored in the receiver's database or memory, or can be sent to the receiver along with the color signal.

Step S14 , according to the determined color coordinates, the filter 20 is used to decompose the coordinates of the received color signal to obtain the coordinate value of each pixel of the color signal. For example, the color coordinates of the first pixel of the color signal decomposed by the filter 20 are (R:G:B)=(11,62,19).

Step S16 , according to the determined superposition codes, analyze the decomposed coordinate values of each pixel of the color signal to obtain the intensity code corresponding to each coordinate value. The analysis is an inverse operation of performing intensity code superposition on each coordinate value, that is, calculating which group of intensity codes each coordinate value is obtained by superimposing. For example, the R coordinate value of the first pixel above is 11=1+2+8, which is obtained by superimposing the three numbers 1, 2, and 8 in the superposition code, that is, the R coordinate strength code is {1,2,8} ; The G coordinate value of the first pixel above is 62=2+4+8+16+32, which is obtained by superimposing five numbers of 2, 4, 8, 16, and 32 in the superposition code, that is, the G coordinate strength code is {2,4,8,16,32}; the B coordinate value of the first pixel above is 19=1+2+16, which is obtained by superimposing the three numbers 1, 2, and 16 in the superposition code, that is, the B coordinate Intensities are encoded as {1,2,16}.

Step S18 , digitize the intensity codes of each coordinate of each pixel of the color signal to obtain corresponding digital codes. For example, when the superposition code is {n(i)}={1,2,4,8}, the digital code corresponding to the intensity code {} is 0000, the digital code corresponding to the intensity code {1} is 0001, and the intensity code The digital code corresponding to {2} is 0010, the digital code corresponding to the intensity code {1,2} is 0011, the digital code corresponding to the intensity code {4} is 0100, and the digital code corresponding to the intensity code {1,4} is 0101, The digital code corresponding to the strength code {2,4} is 0110, the digital code corresponding to the strength code {1,2,4} is 0111, the digital code corresponding to the strength code {8} is 1000, and the digital code corresponding to the strength code {1,8} is The digital code of the intensity code {2,8} is 1001, the digital code of the intensity code {2,8} is 1010, the digital code of the intensity code {1,2,8} is 1011, the digital code of the intensity code {4,8} is 1100, The digital code corresponding to the intensity code {1,4,8} is 1101, the digital code corresponding to the intensity code {2,4,8} is 1110, and the digital code corresponding to the intensity code {1,2,4,8} is 1111.

Step S20, display the communication information represented by the color signal on the display 30 according to the obtained digital code.

Referring to FIG. 6 , it is another representation of FIG. 1 . After the color signal 100 is received by the sensor 10 (step S10 ), the color coordinate 102 and superposition code 110 corresponding to the color signal 100 are determined (step S12 ). According to the color coordinates 102 , the color signal 100 is decomposed by the filter 20 (step S14 ), and the R coordinate value 104 , the G coordinate value 106 and the B coordinate value 108 of each pixel of the color signal 100 are obtained. According to the superposition code 110 , the decomposed R coordinate value 104 , G coordinate value 106 and B coordinate value 108 of each pixel are respectively analyzed (step S16 ) to obtain corresponding intensity codes 112 , 114 , 116 . The intensity codes 112 , 114 , 116 are respectively digitized (step S18 ), to obtain digitized codes 118 , 120 , 122 . The digital codes 118, 120, 122 collectively represent the communication information 124 contained in the pixel. Finally, the communication information 124 decoded by each pixel of the color signal 100 is displayed on the display 30 (step S20 ).

It can be seen from the above content that the amount of information contained in a color signal can reach (I^M)^K types, where I=sum(C(i,y),y=0~i)), and i is the middle code of the superimposed code division M is the number of color coordinates (for example, RGB color coordinates are 3), and K is the number of matrix points of the color signal (that is, the number of pixels). However, if each matrix point can only be a digital signal of 0 or 1, the amount of information contained can only reach 2^K types. Therefore, the amount of information contained in the communication signal after color superposition coding can be greatly increased.

The above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solution of the present invention.

Claims (8)

1. A method for color overlay encoding and decoding, characterized in that the method comprises steps: receive a color signal; Determine the color coordinates and superposition codes corresponding to the color signal, the superposition codes are a set of numbers that can be disassembled and identified, wherein the sum of the numbers of any sub-set is not equal to any number in the set, and any two sub-sets The sum of is not equal; According to the determined color coordinates, decompose the received color signal into coordinates to obtain the coordinate value of each pixel of the color signal; Analyzing each coordinate value of the color signal according to the determined superposition code to obtain an intensity code corresponding to each coordinate value; and Each intensity code is digitized to obtain a corresponding digitized code. 2. The color superposition encoding and decoding method according to claim 1, characterized in that, the method further comprises the steps of: The communication information expressed by the color signal is displayed according to the obtained digital code. 3. The color superposition encoding and decoding method according to claim 1, wherein the color signal is a color matrix including a plurality of pixels, and each pixel represents different communication information through a different color. 4. The color superposition encoding and decoding method according to claim 1, wherein the received color signal is obtained by encoding the communication information to be expressed according to the color coordinates and the superposition code. 5. The color superposition encoding and decoding method according to claim 4, wherein the encoding process of the color signal comprises: determine the color coordinates to be used for encoding the communication information; Determining the overlay subcodes to be used to encode the communication information; According to the digital coding of the communication information, select the corresponding superimposed code for each coordinate of each pixel of the color signal to form the intensity code of each coordinate; superimposing the intensity codes of each coordinate to obtain each coordinate value of each pixel of the color signal; and A color signal is generated based on the color represented by the coordinate value of each pixel in the color coordinate. 6. The color superposition encoding and decoding method as claimed in claim 5, characterized in that, each digit in the superimposition sub-code corresponds to a binary bit of digital coding, and arbitrarily selects y from the i numbers of a group of superposition sub-codes , where 0≦y≦i constitutes an intensity code, all numbers in the intensity code are superimposed, and the obtained value represents a coordinate value in the color coordinates. 7. A color overlay coding method, characterized in that the method comprises steps: determine the color coordinates to be used to encode the communication information; Determine the superposition code to be used to encode the communication information, the superposition code is a set of numbers that can be disassembled and identified, wherein the sum of the numbers of any sub-set is not equal to any number in the set, and any two sub-sets The sum of is not equal; According to the digital coding of the communication information, select the corresponding superimposed code for each coordinate of each pixel of the color signal to form the intensity code of each coordinate; superimposing the intensity codes of each coordinate to obtain each coordinate value of each pixel of the color signal; and A color signal is generated based on the color represented by the coordinate value of each pixel in the color coordinate. 8. color superposition coding method as claimed in claim 7, it is characterized in that, each digital correspondence in the superimposition code sub-code is a binary bit of digitized coding, arbitrarily selects y from a group of i numbers of superposition code sub-code, Among them, 0≦y≦i constitutes an intensity code, all numbers in the intensity code are superimposed, and the obtained value represents a coordinate value in the color coordinates.