CN114018408B - Color recognition circuit based on infrared ranging compensation and modulation method - Google Patents
Color recognition circuit based on infrared ranging compensation and modulation method Download PDFInfo
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- CN114018408B CN114018408B CN202111416265.6A CN202111416265A CN114018408B CN 114018408 B CN114018408 B CN 114018408B CN 202111416265 A CN202111416265 A CN 202111416265A CN 114018408 B CN114018408 B CN 114018408B
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- 238000012545 processing Methods 0.000 claims abstract description 23
- 238000004148 unit process Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 24
- 230000000903 blocking effect Effects 0.000 claims description 7
- 230000001960 triggered effect Effects 0.000 claims description 5
- 101100434411 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ADH1 gene Proteins 0.000 claims description 3
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- 230000009286 beneficial effect Effects 0.000 abstract description 3
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- 239000003086 colorant Substances 0.000 description 2
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- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000002955 isolation Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
- G01J3/108—Arrangements of light sources specially adapted for spectrometry or colorimetry for measurement in the infrared range
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/506—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour produced by screens, monitors, displays or CRTs
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Abstract
The invention provides an infrared ranging-based color compensation identification circuit and a modulation method, comprising the following steps: a signal transmitting circuit and a signal receiving processing circuit; the signal transmitting circuit includes: RGB light-emitting diode, infrared emission unit; the signal receiving and processing circuit comprises a receiving unit and a processing unit; the receiving unit receives signals sent by the RGB light emitting diode and the infrared emission unit, the processing unit processes the signals to obtain the distance between the infrared emission unit and the receiving unit and the collected RGB value, the collected RGB is compensated according to the corresponding relation between RGB color compensation and the distance, and the color is obtained by adopting the compensated RGB value. The invention compensates the color according to the distance, solves the problem of application limitation of the software algorithm, has simple circuit structure and lower hardware cost, and is beneficial to being applied to low-price equipment.
Description
Technical Field
The invention relates to the technical field of color recognition equipment circuits, in particular to an infrared ranging compensation-based color recognition circuit and a modulation method.
Background
The method is limited by the process of a camera and the difference of attenuation degrees of light with different colors in the propagation process, the color cast problem exists when the shot pictures are compared with real objects, and aiming at the color cast problem, a software algorithm is generally adopted to optimize, so that the shot pictures are more close to reality, certain limitation exists in the use of the software algorithm, and the optimization effect is not stable enough under different scenes. A new optimization method is needed to ameliorate this problem.
In the chinese patent document with publication number CN105611140a, a photographing control method, a photographing control device and a terminal are disclosed, where the photographing control method includes: when a photographing instruction of a user is received, acquiring a black-and-white preview picture of a current scene through a first camera of the terminal; analyzing the black-and-white preview picture to detect whether the current scene is backlit; and starting a target photographing mode of a second camera of the terminal according to the detection result so as to photograph the current scene in the target photographing mode, wherein the second camera is used for photographing a color picture.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a color recognition circuit based on infrared ranging compensation and a modulation method.
According to the invention, the color recognition circuit based on infrared ranging compensation comprises: a signal transmitting circuit and a signal receiving processing circuit;
The signal transmitting circuit includes: RGB light-emitting diode, infrared emission unit; the signal receiving and processing circuit comprises a receiving unit and a processing unit;
The receiving unit receives signals sent by the RGB light emitting diode and the infrared emission unit, the processing unit processes the signals to obtain the distance between the infrared emission unit and the receiving unit and the acquired RGB value, the acquired RGB is compensated according to the corresponding relation between RGB color compensation and the distance, and the color is obtained by adopting the compensated RGB value.
Preferably, the signal transmitting circuit further comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4;
The drain electrode of the MOS tube Q1 is connected with one end of the resistor R1, the source electrode of the MOS tube Q1 is grounded, and the grid electrode of the MOS tube Q1 forms an IO1 port;
the drain electrode of the MOS tube Q2 is connected with one end of the resistor R2, the source electrode of the MOS tube Q2 is grounded, and the grid electrode of the MOS tube Q2 forms an IO2 port;
The drain electrode of the MOS tube Q3 is connected with one end of the resistor R3, the source electrode of the MOS tube Q3 is grounded, and the grid electrode of the MOS tube Q3 forms an IO3 port;
The other end of the resistor R1, the other end of the resistor R2 and the other end of the resistor R3 are respectively connected with three cathodes of the RGB light-emitting diode;
the drain electrode of the MOS tube Q4 is connected with the negative electrode of the infrared emission unit, the source electrode of the MOS tube Q4 is grounded, and the grid electrode of the MOS tube Q4 forms an IO4 port; the positive electrode of the infrared emission unit is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with VCC;
The positive electrode of the R light-emitting diode, the positive electrode of the G light-emitting diode and the positive electrode of the B light-emitting diode are connected and then connected with VCC.
Preferably, the processing unit includes: OP amplifier, resistor R6, resistor R7, resistor R8, resistor R9, resistor R10, and capacitor C2;
One end of the receiving unit is connected with VCC, the other end of the receiving unit is respectively connected with one end of a resistor R6, an IN A+ port of an OP amplifier and an IN B+ port of the OP amplifier, the other end of the resistor R6 is grounded, an OUT A port of the OP amplifier is connected with one end of a resistor R7, the other end of the resistor R7 is respectively connected with an IN A-port of the OP amplifier and one end of a resistor R8, and the other end of the resistor R8 is connected with a V-port of the OP amplifier and grounded; the V+ port of the OP amplifier is respectively connected with VCC and one end of a capacitor C2, and the other end of the capacitor C2 is grounded; the OUT B port of the OP amplifier is connected with one end of a resistor R9, the other end of the resistor R9 is respectively connected with the IN B-port of the OP amplifier and one end of a resistor R10, and the other end of the resistor R10 is grounded.
Preferably, the OUT a port of the OP amplifier is used for connecting with ADC1, and the OUT B port of the OP amplifier is used for connecting with ADC2.
Preferably, the OUT A port of the OP amplifier outputs the amplified voltage value of the RGB signals.
Preferably, the OUT B port of the OP amplifier outputs the amplified voltage value of the infrared signal.
Preferably, the signal receiving processing circuit further includes a blocking unit, the blocking unit includes a resistor R5 and a capacitor C1, one end of the capacitor C1 is connected to the other end of the receiving unit, the other end of the capacitor C1 is respectively connected to one end of the resistor R6, an IN a+ port of the OP amplifier and an IN b+ port of the OP amplifier, one end of the resistor R5 is connected to one end of the capacitor C1, and the other end of the resistor R5 is connected to the other end of the resistor R6 and grounded.
Preferably, the compensation relation between the distance and the RGB value of the pixel point is as follows:
y＝f(x)
Wherein y is the compensation value of the pixel points RGB, and x is the distance between the measured object and the color sensor.
Preferably, the capacitor C2 is arranged close to the OP amplifier.
According to the invention, the modulation mode based on infrared ranging compensation color recognition comprises the following steps: the infrared emission unit continuously works according to the set frequency, and the color sensor is triggered to work or continuously works according to conditions;
The operation is triggered according to the condition: when the measured distance is smaller than the set value, the color sensor works at the set frequency;
The continuous operation is as follows: the color sensor always works at the same frequency as the infrared emission unit.
Compared with the prior art, the invention has the following beneficial effects:
1. the circuit has simple structure and lower hardware cost, and is beneficial to being applied to low-cost equipment.
2. The invention compensates the color according to the distance, and solves the problem of application limitation of the software algorithm.
3. The isolation circuit in the circuit structure can remove interference of ambient light on a measurement result.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a signal transmitting circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a signal receiving and processing circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing the relationship between RGB color compensation and distance according to an embodiment of the present invention;
Fig. 4 is a modulation timing chart based on infrared ranging compensation color recognition in an embodiment of the invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
The invention discloses a color recognition circuit based on infrared ranging compensation, which comprises: a signal transmitting circuit and a signal receiving processing circuit; referring to fig. 1, the signal transmitting circuit includes: RGB light-emitting diode, infrared emission unit IRDA; referring to fig. 2, the signal receiving processing circuit includes a receiving unit Q5 and a processing unit.
The receiving unit Q5 receives signals sent by the RGB light emitting diode and the infrared emitting unit IRDA, the processing unit processes the signals to obtain the distance between the infrared emitting unit IRDA and the receiving unit Q5 and the collected RGB values, the collected RGB values are compensated according to the corresponding relation between RGB color compensation and the distance, and the colors are obtained by adopting the compensated RGB values.
The infrared signal of the infrared sensor IRDA is loaded on the pulse carrier wave, so that the background noise is removed, and the infrared signal is more stable. After the problem of light attenuation during infrared ranging is solved, the range of the ranging is increased.
In more detail, the signal transmitting circuit further comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3 and a MOS transistor Q4.
The drain electrode of the MOS tube Q1 is connected with one end of the resistor R1, the source electrode of the MOS tube Q1 is grounded, and the grid electrode of the MOS tube Q1 forms an IO1 port. The drain electrode of the MOS tube Q2 is connected with one end of the resistor R2, the source electrode of the MOS tube Q2 is grounded, and the grid electrode of the MOS tube Q2 forms an IO2 port. The drain electrode of the MOS tube Q3 is connected with one end of the resistor R3, the source electrode of the MOS tube Q3 is grounded, and the grid electrode of the MOS tube Q3 forms an IO3 port. The other end of the resistor R1, the other end of the resistor R2 and the other end of the resistor R3 are respectively connected with three cathodes of the RGB light-emitting diode;
The drain electrode of the MOS tube Q4 is connected with the negative electrode of the infrared emission unit IRDA, the source electrode of the MOS tube Q4 is grounded, and the grid electrode of the MOS tube Q4 forms an IO4 port; the positive pole of infrared emission unit IRDA is connected with one end of resistance R4, the other end of resistance R4 is connected VCC.
The positive electrode of the R light-emitting diode, the positive electrode of the G light-emitting diode and the positive electrode of the B light-emitting diode are connected and then connected with VCC. MOS switches Q1, Q2, Q3 and Q4 of the RGB lamp of the U1 and the IRDA infrared emission tube are controlled through IO1, IO2, IO3 and IO4, switching of the RGB lamp and infrared is achieved, and then the RGB lamp and the infrared are emitted according to specific frequency in a time-sharing mode.
In more detail, the processing unit comprises: OP amplifier, resistor R6, resistor R7, resistor R8, resistor R9, resistor R10, and capacitor C2. One end of the receiving unit Q5 is connected with VCC, the other end of the receiving unit Q5 is respectively connected with one end of a resistor R6, an IN A+ port of an OP amplifier and an IN B+ port of the OP amplifier, the other end of the resistor R6 is grounded, an OUT A port of the OP amplifier is connected with one end of a resistor R7, the other end of the resistor R7 is respectively connected with an IN A-port of the OP amplifier and one end of a resistor R8, and the other end of the resistor R8 is connected with a V-port of the OP amplifier and grounded; the V+ port of the OP amplifier is connected with VCC and one end of a capacitor C2 respectively, the other end of the capacitor C2 is grounded, and the capacitor C2 is arranged close to the OP amplifier. The OUT B port of the OP amplifier is connected with one end of a resistor R9, the other end of the resistor R9 is respectively connected with the IN B-port of the OP amplifier and one end of a resistor R10, and the other end of the resistor R10 is grounded. The receiving unit Q5 employs a photoresistor, in another variant, a color sensor.
The OUT A port of the OP amplifier is used for being connected with the ADC1, and the OUT B port of the OP amplifier is used for being connected with the ADC2. The OUT A port of the OP amplifier outputs the amplified voltage value of the RGB signal, and the OUT B port of the OP amplifier outputs the amplified voltage value of the infrared signal.
The signal receiving processing circuit further comprises a blocking unit, the blocking unit comprises a resistor R5 and a capacitor C1, the blocking unit can filter the influence of ambient light, one end of the capacitor C1 is connected with the other end of the receiving unit Q5, the other end of the capacitor C1 is respectively connected with one end of a resistor R6, an IN A+ port of an OP amplifier and an IN B+ port of the OP amplifier, one end of the resistor R5 is connected with one end of the capacitor C1, and the other end of the resistor R5 is connected with the other end of the resistor R6 and grounded.
The compensation relation between the distance and the RGB value of the pixel point is as follows:
y＝Ax3+Bx2+Cx+D
wherein y is a compensation value of the pixel points RGB, x is a distance between the measured object and the color sensor, A, B, C and D are distance compensation coefficients. Specifically, referring to fig. 3, the correspondence between RGB color compensation and distance includes:
yR＝0.0795x3-2.2495x2+40.21x-87.708；
yB＝0.2246x2+16.134x-38.912；
yG＝0.0702x3-1.5715x2+12.83x-23.349；
Where y R represents the compensation value for the R color, y B represents the compensation value for the B color, y G represents the compensation value for the G color, and x represents the distance. And calculating to obtain an actual distance value according to the transmitting frequency of the infrared transmitting unit and the relationship between infrared and distance. And calculating a compensation value of the RGB color according to the distance value, superposing the compensation value of the RGB color and the acquired RGB value to obtain a final RGB value, and obtaining the color according to the finally generated RGB value.
The invention also introduces a modulation method of infrared ranging correction based on color compensation, the infrared emission unit continuously works according to the set frequency, and the color sensor adopts the condition triggering work or continuous work; the operation is triggered according to the condition: when the measured distance is smaller than the set value, the color sensor works at the set frequency; the continuous operation is as follows: the color sensor always operates at a set frequency.
Referring to fig. 4, if the set color recognition triggers the operation within a predetermined distance, only the infrared data is collected outside the predetermined distance, and the infrared range finder operates at the timing of the IRDA in fig. 4 as in the T 1 of the timing of the CLK in fig. 4, and the frequency of the modulation can be set according to the actual use.
And when the distance reaches the specified value according to the infrared ranging data in the section T 2, starting a color sensor to perform color recognition.
When the data of the color is collected in the section T 3、T4 in fig. 4, the frequency of the infrared collected data is not changed, the infrared part still works at the time sequence of the IRDA in fig. 4, and the color sensor uses the set frequency to collect the data of the color, such as the time sequence R, G, B in fig. 4, so that the infrared data is collected while the color data is collected.
When the collected infrared data returns beyond the prescribed distance, the color sensor is turned off and the infrared portion still operates at the timing of the IRDA of fig. 4.
If the color recognition is set to work all the time, the infrared part and the color sensor part work at the time sequence of the section T 3、T4 of CLK in FIG. 4, and the acquisition of the infrared data is carried out at the same time of the acquisition of the color data.
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. An infrared ranging compensation color recognition circuit, comprising: a signal transmitting circuit and a signal receiving processing circuit;
the signal transmitting circuit includes: RGB light-emitting diode, infrared emission unit;
the signal receiving and processing circuit comprises a receiving unit and a processing unit;
The receiving unit receives signals sent by the RGB light emitting diode and the infrared emission unit, the processing unit processes the signals to obtain the distance between the infrared emission unit and the receiving unit and the acquired RGB value, the acquired RGB is compensated according to the corresponding relation between RGB color compensation and the distance, and the color is obtained by adopting the compensated RGB value.
2. The infrared ranging compensation color identification circuit of claim 1, wherein: the signal transmitting circuit further comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4;
The drain electrode of the MOS tube Q1 is connected with one end of the resistor R1, the source electrode of the MOS tube Q1 is grounded, and the grid electrode of the MOS tube Q1 forms an IO1 port;
the drain electrode of the MOS tube Q2 is connected with one end of the resistor R2, the source electrode of the MOS tube Q2 is grounded, and the grid electrode of the MOS tube Q2 forms an IO2 port;
The drain electrode of the MOS tube Q3 is connected with one end of the resistor R3, the source electrode of the MOS tube Q3 is grounded, and the grid electrode of the MOS tube Q3 forms an IO3 port;
The other end of the resistor R1, the other end of the resistor R2 and the other end of the resistor R3 are respectively connected with three cathodes of the RGB light-emitting diode;
the drain electrode of the MOS tube Q4 is connected with the negative electrode of the infrared emission unit, the source electrode of the MOS tube Q4 is grounded, and the grid electrode of the MOS tube Q4 forms an IO4 port; the positive electrode of the infrared emission unit is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with VCC;
the positive electrode of the R light-emitting diode, the positive electrode of the G light-emitting diode and the positive electrode of the B light-emitting diode are connected and then connected with VCC.
3. The infrared ranging compensation color identification circuit of claim 1, wherein: the processing unit includes: OP amplifier, resistor R6, resistor R7, resistor R8, resistor R9, resistor R10, and capacitor C2;
One end of the receiving unit is connected with VCC, the other end of the receiving unit is respectively connected with one end of a resistor R6, an IN A+ port of an OP amplifier and an IN B+ port of the OP amplifier, the other end of the resistor R6 is grounded, an OUT A port of the OP amplifier is connected with one end of a resistor R7, the other end of the resistor R7 is respectively connected with an IN A-port of the OP amplifier and one end of a resistor R8, and the other end of the resistor R8 is connected with a V-port of the OP amplifier and grounded; the V+ port of the OP amplifier is respectively connected with VCC and one end of a capacitor C2, and the other end of the capacitor C2 is grounded; the OUT B port of the OP amplifier is connected with one end of a resistor R9, the other end of the resistor R9 is respectively connected with the IN B-port of the OP amplifier and one end of a resistor R10, and the other end of the resistor R10 is grounded.
4. The infrared-ranging compensation color identification circuit of claim 3, wherein: the OUT A port of the OP amplifier is used for being connected with the ADC1, and the OUT B port of the OP amplifier is used for being connected with the ADC2.
5. The infrared-ranging compensation color identification circuit of claim 3, wherein: the OUT A port of the OP amplifier outputs the amplified voltage value of the RGB signals.
6. The infrared-ranging compensation color identification circuit of claim 3, wherein: and an OUT B port of the OP amplifier outputs the amplified voltage value of the infrared signal.
7. The infrared-ranging compensation color identification circuit of claim 3, wherein: the signal receiving processing circuit further comprises a blocking unit, the blocking unit comprises a resistor R5 and a capacitor C1, one end of the capacitor C1 is connected with the other end of the receiving unit, the other end of the capacitor C1 is respectively connected with one end of a resistor R6, an InA+ port of an OP amplifier and an InB+ port of the OP amplifier, one end of the resistor R5 is connected with one end of the capacitor C1, and the other end of the resistor R5 is connected with the other end of the resistor R6 and grounded.
8. The infrared ranging compensation color identification circuit of claim 1, wherein:
the compensation relation between the distance and the RGB value of the pixel point is as follows:
y＝f(x)
Wherein y is the compensation value of the pixel points RGB, and x is the distance between the measured object and the color sensor.
9. The infrared-ranging compensation color identification circuit of claim 3, wherein: the capacitor C2 is arranged close to the OP amplifier.
10. A modulation scheme based on infrared ranging compensation color recognition according to any one of claims 1-9, characterized in that: the infrared emission unit works according to the set frequency, and the color sensor is triggered to work or continuously work according to conditions;
the operation is triggered according to the condition: when the measured distance is smaller than the set value, the color sensor and the infrared emission unit work at the set frequency;
the continuous operation is as follows: the color sensor always works with a set frequency.
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| CN202111416265.6A CN114018408B (en) | 2021-11-25 | 2021-11-25 | Color recognition circuit based on infrared ranging compensation and modulation method |
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| JP2006266959A (en) * | 2005-03-25 | 2006-10-05 | Jfe Steel Kk | Instrument and method for measuring color of object surface |
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