TW201042243A - Color identification module and calibrating method therein - Google Patents

Abstract

The present invention relates to a calibrating method for a color identification module, wherein the color identification module includes a light emitted circuit for emitting many kinds of primary color light and a standard parameter table for storing multiple color data. The method includes the steps of: lighten a the light emitted circuit to emit a plurality of primary color lights to illuminate a standard gray level color; acquiring each reflecting light of the primary color lights to obtain the detecting data corresponding to the primary colors; extracting the primary color parameter of the standard gray level from the standard parameter table; comparing the detecting data with the primary color parameter, to obtain the calibrating factor; and adjusting each primary color parameter of each primary color component of the color data storing in the standard parameter table according to the calibrating factor.

Description

201042243 VI. Description of the Invention: [Technical Field] The present invention relates to a technique for color recognition, and more particularly to a method for calibrating a color recognition module and color recognition using the calibration method Module. Turtle • [Prior Art] The use of electronic technology for color recognition is an evolving technology that continues to expand in applications. For example, it is convenient for blind or color-blind patients to identify colors, and color recognition is added to toys to increase educational: fun and so on. Most of the prior art uses a complementary metal oxide semiconductor sensor (CMOS SENSOR) to realize color recognition, which uses an integrated (5) (10) optocoupler device to sense a reflected signal of an object to be measured under ordinary white light illumination to obtain an electrical signal; and then according to the electrical signal The external light characteristics are obtained, and the parameters of the respective colors contained therein are analyzed accordingly. This technology achieves color detection through complex digital signal processing and has high reliability. However, due to the high cost, its application range is limited. The country's special wealth in the country is disclosed in G9539. It is a kind of color recognition and injury. It uses a light source that emits three basic colors of red, green and blue. It emits the above three basic colors of the probe light on the object to be tested. The reflected light corresponding to the three basic colors of red, green and blue is obtained, and the sensors are sequentially detected using the sensor to obtain electronic parameters corresponding to the three basic colors of red, green and blue. Next, based on the obtained probe data corresponding to the three basic colors, check 4 201042243 to query the standard color parameter table, obtain the color corresponding to each _ basic color (four) result ' and the most judged result as the final color recognition result. In addition, the above method also reveals its calibration method. This calibration method is mainly performed at the factory, and (4) the photosensitive element is calibrated as follows. Fig. 2 is a flow chart showing the calibration method disclosed in the Chinese Patent Application No. 20051009539. Please refer to the i-th diagram. The calibration method includes the following steps: Step S101: Start. Ο Step _: Light up the three standard basic color sources provided inside the factory to illuminate a standard white object to be tested. Step s Η) 3 ·· Detect the reflected light of this standard white analyte to obtain the electronic parameters at this ambient brightness. Step S104: Comparing the obtained electronic parameters with the stored standard color parameter: white parameter, and calculating a linear ratio to correct the reference parameter table stored in the memory. Step S105: End.

However, the drawbacks of the above invention are: • The requirements such as beauty are fine. Color detection: For its selected components, including the illumination source and the sensor, the accuracy is high, so it can not meet the fluctuation of the supply voltage. 2. The white light is the mixed color 'so the 'photo sensor is tested in this condition' The error is generated. 3. Calibrate only for component drift of the sensor. Since there is no total, the measurement 4 ′, if the light emitted by the illuminating element after the assembly is completed, the sensation will be affected. 5 201042243 SUMMARY OF THE INVENTION An object of the present invention is to provide a calibration method suitable for a color recognition module, which has a simple structure, has low requirements for components, is simple in operation, and has low cost, and can be widely applied and meets actual needs. Factory mass production requirements. Ο 另一 Another object of the present invention is to provide a color recognition module which is more accurate in color recognition by the above calibration method. In view of the above, the present invention provides a calibration method for a color recognition module, wherein the color module includes a light emitting circuit for emitting a plurality of basic colors and a reference parameter table for storing a plurality of colors, and the calibration method includes the following steps. Illuminating the light emitting circuit to emit a specific basic color to illuminate a standard grayscale color; obtaining the reflected light emitted by the light emitting circuit to obtain a specific beauty-detection data; and extracting the standard grayscale color from the reference parameter table. a specific basic color parameter of the basic color; the different specific color of the specific basic color is compared with a specific basic color parameter to obtain - calibration ratio ο factor ' and adjust the reference parameter table according to the calibration scaling factor Stored face + &quot; mother number. The specific basic color ginseng of the specific basic color component in the Bessie is additionally provided with _ color. The color modulo includes a calibrator: a λ-parameter-light-emitting circuit in which a plurality of colors are stored, and a luminescence The failure calibration method includes the following steps of gray scale color; obtaining the illuminating ray separately and &quot; a basic color, to illuminate the reflected light of each basic color emitted by the standard circuit, to obtain a detection corresponding to each basic color of 6 201042243 Data; a primary color parameter of the standard grayscale color is taken from the reference parameter table; the detected data is compared with the primary color parameter to obtain a calibration scaling factor; and the reference parameter table is adjusted according to the calibration scaling factor, each storage The basic color parameters of the basic color components in the color data. The invention further provides a color recognition module, which comprises a lighting circuit, a storage unit, a sensor and a control unit. The lighting circuit is used to emit a plurality of basic color lights. The storage unit stores - a reference parameter table, wherein the reference parameter table includes standard illuminating data of a plurality of colors corresponding to the above basic colors. The sensor is configured to receive reflected light of the light emitted by the light emitting circuit. When the control unit is coupled to the sensor, the light-emitting circuit, and the storage unit w to perform a calibration procedure, the control unit controls the light-emitting circuit to emit a specific basic color light to illuminate a standard gray-scale color, and then, the sensor senses the reflection of the light-emitting circuit. Light to obtain a probe data for a particular base color. The control unit 70 extracts a specific basic color parameter of a specific basic color from the primary color parameter corresponding to the standard gray color according to the reference parameter table, and compares the detection data of the specific base color with the specific basic color parameter to obtain A calibration. Scale factor. At last. The control unit adjusts the specific basic color gradation of the specific basic color component in each color in the reference parameter table according to the calibration scaling factor, according to the calibration method of the color recognition module of the color recognition module according to the preferred embodiment of the present invention. In the foregoing primary color parameter of the standard gray-scale color from the reference parameter table 1, the step of the specific basic color-specific basic color parameter includes: dividing the detection data by a specific basic color parameter to obtain a calibration: 7 201042243 In a preferred embodiment, the foregoing root number, in the reference parameter table, the step of the characteristic basic color parameter of the special color factor in each of the colors includes: a specific basic color of a specific basic color in the calibration ratio= Parameters, and use the ^ number to update the benchmark parameter table. In a preferred embodiment, the aforementioned two color includes one of red, green, and blue=characteristics, and the aforementioned standard grayscale color is white. The light-emitting circuit can be implemented by using a red, green, and blue light-emitting diode or a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode. The sensor can be implemented with a neon-sensitive diode. The spirit of the present invention is to illuminate a standard grayscale color by illuminating different basic color lights with time division to obtain electronic parameters of the reflected light. Thereafter, the electronic parameters are compared to standard electronic parameters stored in the storage unit to obtain a ratio of the two, which can be considered as a result of errors in different components. Finally, using this ratio, the color stored in each of the storage units is corrected. The mechanism of such correction is simple, and can reduce the accuracy requirement of the component, the calculation process is simple, the cost is low, and the wide application can be obtained and the actual factory mass production requirements can be met. The above and other objects, features, and advantages of the present invention will become more apparent <RTIgt; Embodiment 2 FIG. 2 is a structural block diagram of a color recognition module according to an embodiment of the present invention. Please refer to CC, rsi 2 diagram' This color recognition module includes a lighting circuit 2〇 j, = control early 203, a storage unit 204, and a color recognition U wheeling unit 2G5. The illuminating circuit 2G1 is configured to emit a plurality of basic color lights, such as red light, green light, and blue light. Generally, a red, green, and blue primary light emitting diode or a red light emitting diode or a green light emitting light can be used. The diode and a blue light emitting diode are implemented. The sensor 202 is configured to receive the reflected light of the object to be tested 2〇6 by the light-emitting circuit 2〇1, and generally can be implemented by using a photoresistor or a photosensitive diode. The control unit 203 is configured to couple and control the sensor 2, the light emitting circuit 201, and the storage unit 204. The storage unit 2〇4 is configured to store a reference parameter table including a plurality of standard illuminating data corresponding to the basic colors. Table 1 is a table of reference parameters of an embodiment of the present invention. Please refer to the following Table 1: ❹ Color No. M, 1 Dark Green R Parameter 0x0021 0x0026

0x002E G parameter 0x0022 0x0046 0x0080

B parameter 0x005C 0x0128

0x014C Green 4 Coffee Earth Yellow 0x0029 0x0058

0x006B

0x008B 0x0038 0x0076

QxQOAQ 0x0070 OxOOAO Pink Blue Light Blue 0x0067 0x0081 0x00F7 Qx01C8 0x02C8

9 201042243 Adipose yellow 10 0x00C9 OxOODC OxOOEO Gray 11 0x00C9 OxOOEF 0x0250 Yellow green 12 0x0098 OxOOFB OxOODC Sky blue 13 ΟχΟΟΑδ 0x012C 0x0318 Red 14 0χ00Α7 0x002E 0x0068 Purple 15 ΟχΟΟΒΑ 0x002C OxOOAC Pink 16 OxOOEC 0x0062 0x013C Skin color 17 OxOllC 0x00B6 0x0140 Pink purple 18 0x0116 OxOOBO 0x0228 Yellow 1 9 0x0154 0x0138 OxOlOC White 20 0x0158 0x0177 0x03D8 Table 1 and Table 2 are the color tables in each color in the standard 255 gray scale: Color No. R Grayscale G Grayscale B Grayscale Black 1 0 0 0 Blue 2 0 0 255 Dark green 3 0 127 127 Green 4 0 255 0 Coffee 1# 5 127 63 0 Earth yellow 6 127 127 0 Pink blue 7 127 127 191 Light blue 8 127 255 255 Purple 9 191 63 255 10 201042243 Alight yellow 1 〇 191 r ---- 191 0 Gray 11 191 191 191 Yellow Green 12 191 255 63 Sky Blue 13 191 255 —----------- 255 Red 14 255 0 0 Purple 15 255 63 255 Pink 16 255 127 191 Skin Color 17 255 191 127 pink purple 18 255 ----------- 255 yellow 19 255 255 63 white 20 255 255 255 Table 2 In general, the benchmark parameter table of this table is for Color, preset detection value two. In other words, when using standard three-color light to detect black (color number 1), the theoretical red value is 0x0021 (that is, the decimal digit of 33), and the green detection value is • The hexadecimal 0x0022 (that is, the decimal digit of 34), the blue detection value. It is the hexadecimal 0x005C (that is, the decimal 92). The gray scale of the above table 2 is (0,0,0), which means that the light should be completely absorbed when it is irradiated to black. However, there is actually no such surface, that is, in fact, some of the reflected light is still detected when it is irradiated onto the black surface. In addition, it is technically difficult to achieve a single-frequency red, green or blue light. 11 201042243 The values stored in the above reference parameter table are the values given by the engineer using multiple experiments. However, the 'light-emitting circuit 201, the sensor 2', the external voltage, and other components using zero-to-zero totals have slight errors. These errors sum up and may affect color detection, 'making color detection inaccurate. Therefore, the following calibration method can be used to make the most correction after the product is shipped from the factory, or the user can use this method to correct it after using it for a period of time. Figure 3 is a flow chart showing a method of correcting the color recognition module of the embodiment of the present invention. Referring to FIG. 2 and FIG. 3, the correction method includes the following steps: Step S301: Start. Step S302: Control the lighting circuit to emit a specific basic color light to illuminate the standard grayscale color. The viewer operates the pure knowledge (4) group, so that the light-emitting circuit of the color recognition module emits a basic color light, such as red, green or blue, and the user operates the color recognition module to illuminate a standard gray-scale color, which is more commonly used. It is white. However, white is only a preferred implementation. ‘= As long as there is stored gray in the reference parameter table, it can also be used as step S303: sensing the reflected light of the light-emitting circuit to obtain specific basic detection data. The sensor 202 converts the sensed reflected light into an electronic parameter. ... Table step S304: Perform an alignment operation. The control unit 2〇3 takes out the basic color parameter corresponding to the standard gray color from the reference parameter, 12 Ο Ο 201042243 of a specific basic color, and a specific basic color parameter, and the special, Λ Λ, natural color detection data and the specific basic The color parameters are compared to obtain __calibration...Hite is calculated in the following manner: Number. The scale factor can be red (green or blue) color calibration scale factor = light diode illuminating the standard, . (, 4 or blue) color published, "quasi-grey color red (early parameter H _ 尺 监 · ^ color Step S305: Perform calibration procedure. Control π _ quasi-scale factor, adjust the reference parameter table f :: 203 according to the specific basic color parameters of the above color correction components. / Specific basic = or blue) color calibration After the capital _ = the red (green or blue) color component of each = in the benchmark parameter table * quasi-scale factor. , T 4 supervisor J has been 乂 Step S 3 0 6 :: Jiang Bu; seven calls _ Zeng,, to the specified position ^ after calibration, the color parameter table depends on the storage unit 2〇4. Step S307: It is judged whether there is any other cow running. Bahe entered the Zhengzheng. If yes, then /S308. If not, proceed to S3〇9. Step S308: Excluding the specific beauty from the above-mentioned specific color first to take out a new basic step back to step S302. Step S309: End. For example, the second embodiment proposes a calibration method for a color recognition module by using one color to be corrected at a time. Figure 4 is a diagram of another embodiment of the invention $free 丨嫂έ β &gt; The process flow of the correction method of the identification module is shown in the figure ^ M 4 diagram, for any color recognition module, the calibration specific 13 201042243 step S401: start. Step S402: sequentially illuminating the three basic color lights of red, green and blue of the light-emitting circuit respectively to illuminate a standard gray-scale color block. The stomach step S403: respectively obtaining the reflected light of the three basic colors of red, green and blue, and obtaining the electronic parameters corresponding to the three basic colors of red, green and blue. Step S404: Perform an alignment operation. The collected electronic parameters of the red, green and blue basic colors are respectively separated from the white red, green and ^ basic color parameters in the above reference parameter table to obtain the three basic colors of red, green and blue. &gt;Scale factor. By the same token, the calibration factor of the three basic colors of red, green and blue is as follows: Μ ώ A (so the proportional factor) = the red LED illumination of the calibration module

Peeling white detection data / A n The reference color of the white red color of the reference parameter table (calibration scale factor) The green diode of the calibration module is illuminated by the Z color detection data / the white green color of the reference parameter table 〇射白 (2: ratio: factor 丄;:: module's blue diode illuminating; the white color of the base color table in the reference parameter table S405: enter Μ τ &amp; _ color each One = the righteousness program. The twenty color factors in the reference parameter table are obtained by multiplying the two color parameters by the calibration ratio of red, green and blue respectively. The three basic color parameters of the last 20 colors after calibration Table. The survey capital: the two basic colors of the twenty colors that have been collected by Feng Er Table are below the mathematical expression of the operation: 14 201042243

Rx (calibrated data) = Rx (reference parameter table) * scale factor); &amp; (calibrated data) = Gx (reference parameter table) scale factor);

Bx after-sales data) = Βχ (reference parameter table) * 'scale factor';; only sheep, X table is not 20 color serial number, the range is i ^ d &amp; step S4G6. The above 4 calculated calibration The post color parameter table is stored to the storage unit 204 at the U designated location. Step S407. End. Complete the calibration of the color recognition module and update the color table. In summary, the spirit of the present invention is to illuminate a standard grayscale color by using different time-division lights to obtain the electronic parameters of the reflected light. Thereafter, the electronic parameters are compared to standard electronic parameters stored in the storage unit to obtain a ratio of the two, which can be considered as a result of errors in different components. Finally, using this ratio, the color stored in each storage unit is corrected. The mechanism of such correction is simple, and the requirement for accuracy of the component can be reduced, the calculation process is simple, the cost is low, and a wide range of applications can be obtained and the actual mass production requirements of the factory can be met. The specific embodiments of the present invention are intended to be illustrative only and not to limit the scope of the invention to the above embodiments, without departing from the spirit and scope of the invention. The scope of the invention and the various modifications are intended to be within the scope of the invention, and the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart showing a calibration method disclosed in the Chinese Patent Application No. 20051009539. FIG. 2 is a structural block diagram of a color recognition module according to an embodiment of the present invention. Fig. 3 is a flow chart showing a method of correcting the color recognition module of the embodiment of the present invention. Fig. 4 is a flow chart showing a method of correcting the color recognition module of another embodiment of the present invention. [Description of main component symbols] S101~S1〇5: Flow of the calibration method disclosed in the Chinese Patent Application No. 20051009539, 21: illuminating circuit 〇202: sensor. 203: control unit 204: storage unit 205 The output unit 206: the objects to be tested S301 to S309: each step S4CH~_ of the embodiment of the present invention: each step 16 of the embodiment of the present invention

Claims (1)

201042243 VII. Patent application scope: 1) A calibration method for a color recognition module, wherein the color module includes a light-emitting circuit for emitting a plurality of basic colors and a reference parameter table for storing a plurality of colors, the calibration method includes: Illuminating the illuminating circuit to emit a specific basic color to illuminate a standard grayscale color; acquiring the reflected light of the illuminating circuit to obtain a detecting material of the specific basic color; Ο ▲. a reference parameter table, a specific basic color parameter of the specific basic color in the primary color parameter of the standard gray color; and the specific basic color of the #_, n, .6 and the specific basic color beam The number is compared to obtain a calibration scale factor; = the calibration ratio (4) 'adjusts the reference parameter table, each of the parameters; and the specific basic color G of the elementary color component causes the illumination circuit to issue a pulse. The different specific basic colors are repeated in the above step 2, such as the calibration method of the patent range of the first month, wherein the predetermined basic color parameter of the color recognition module described above is compared, and the detection data of the original color and the special color are included. : Several passes—the step of calibrating the scale factor divides the probe data by the scale factor.疋 本 本 , , 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 2010 Adjusting the reference parameter table, the steps of the stored color ^ A, AA ^, the characteristic basic color parameter of the specific basic color include: using some of the stored color data and using the obtained parameter, The calibration scale factor is multiplied by the specific base color parameter for each particular basic color, and the reference parameter table is updated. 4. The method of calibrating a color recognition module as claimed in claim i, wherein the specific basic color includes one of red, green, and blue. 5. If you apply for a patent! The method for calibrating a color recognition module according to the item, wherein the standard gray scale color is white. The method of calibrating a color recognition module according to the first aspect of the invention, wherein the light-emitting circuit is a red, green and blue three-primary light-emitting diode. 7. The method according to claim 2, wherein the light-emitting circuit comprises a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode. 18 201042243 8. A method for calibrating a color recognition module, wherein the color module comprises a light emitting circuit for emitting a plurality of basic colors and a reference parameter table for storing a plurality of colors. The calibration method comprises: illuminating the light emitting circuit ' respectively emitting a plurality of basic colors, U illuminates a standard gray color; obtaining reflected light of each of the basic colors emitted by the light emitting circuit to obtain a probe data corresponding to each of the basic colors; a parameter table, taking out a primary color parameter of the standard grayscale color; comparing the detected data with the primary color parameter to obtain a calibration scale factor; and adjusting the reference parameter table according to the calibration scaling factor, each time The basic color parameters of the basic color component in the stored color data. &quot; 9. The method of aligning a color recognition module as described in claim 8 wherein the basic colors include red, green, and blue. 〇 进 进 〇 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 % % % % % % % % % % % % % % % % 颜色 颜色 颜色 颜色 颜色 颜色Line-calibration scale factor ancient + Zeng, Ganzi ^ calculation includes the following operations: ° ' '$ calibration scale factor ash example factor = red light-emitting diode ^ illuminate the target detection data / benchmark parameter table, the standard Gray-scale color red 19 201042243 Green calibration scale factor = ,, color-emitting light-emitting diode illuminating the base color data; and 胄 table, the &amp; quasi-gray color green blue calibration scale factor = Zluo益上^ ^ ^ ^ Blue hair first diode illuminating the target. In the early parameter table, the standard gray color blue base color data.卞人丨&amp; 巴Θ7监巴 11. Calibration method In the table, the natural parameters For example, the color recognition module described in the application (4) Μ 9: wherein the step of adjusting the specific base of the specific basic color in the reference color according to the calibration scale factor comprises: Amendment 'where the parameter correction includes the following operations: Red calibrated data = I-stored color in the reference leaf parameter table, color component * red calibration scale factor; Green calibrated data = reference I Swallow the color of each stored item in the table The green component* green calibration scale factor; and the color blue calibration data = the reference parameter table each stored blue component * blue calibration scale factor. In the m, please refer to the cross-calibration method of the color recognition module described in item 8 of the fourth item, wherein the standard gray scale color is white. 1 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 14. The method of calibrating a color recognition module as claimed in claim 8, wherein the light emitting circuit comprises a red light emitting diode, a green light emitting diode, and a blue light emitting diode. 1 5. A color recognition module, comprising: a lighting circuit 'to emit a plurality of basic color lights; a storage unit storing a reference parameter table, wherein the reference parameter table comprises a plurality of colors corresponding to the standard colors of the basic colors Data, a sensor, when the basic color light-emitting diodes emit light, the sensor is configured to receive the reflected light thereof; and a control unit coupled to the sensor, the light-emitting circuit, and the a unit, wherein, when performing a calibration procedure, the control unit controls the illumination circuit to emit a specific basic color light to illuminate a _ standard grayscale color; Ο the sensor senses the reflected light of the illumination circuit to obtain the true color a detection data; the control unit receives the corresponding primary color parameter from the reference parameter table, and the specific data of the specific soil + bar parameter, the specific color and the specific Basic color parameter comparison to obtain - help pile, sigh as a calibration scale factor; and the control list; ^t according to the calibration scale factor, adjust the middle, The plurality of one yeast & dry so sigh table &quot; specific basic color of the specific color component of the basic parameters Number 21201042243. 16. The color recognition module set as recited in the scope of application 帛 π, characterized in that: the control unit divides the detected data by the specific basic color parameter to obtain the calibration scale factor. 17. The color recognition module group as recited in claim 15 of the patent application, characterized in that the control unit multiplies the calibration scale factor by a specific basic color of the specific basic color in each of the colors. Parameters, and using the obtained parameters, update the benchmark parameter table. 18. The color recognition module as recited in claim 15 wherein said illumination circuit comprises a red light emitting diode, a green light emitting diode, and a blue light emitting diode. 19. The color recognition module set as recited in claim 15 wherein the aforementioned standard grayscale color is white. 20_ The color recognition mode as recited in claim 15 wherein the sensor comprises a photoresistor or a photosensitive diode. twenty two