CN101059596B - Reflective optical device, color correction method, and electronic apparatus - Google Patents

Abstract

The invention relates to a reflection type optical device, a color correction method and electronic equipment, which utilize a built-in camera and a reflection type optical shielding device to provide functions of a color sensor and a brightness sensor. When the built-in camera provides the function of the color sensor, the reflection type optical device is hung on a display of the electronic equipment, so that light rays with information related to color blocks sent by the display can be received by the built-in camera through the reflection effect of the reflection type optical shielding device, and then the electronic equipment utilizes the reflector compensation matrix and the camera correction matrix to process the light rays received by the built-in camera, so as to obtain the color description file of the display.

Description

Reflective optical device, color correction method and electronic device

technical field

The invention relates to the technical field of a built-in camera, in particular to a reflective optical device, a color correction method and electronic equipment.

Background technique】

In the current market, whether it is a color sensor (Colorimeter), an ambient light sensor (Ambient Light Sensor), or a video camera (PC-CAM or Web-CAM), they all exist in the form of independent components. If you want to use the functions provided by the above three devices, you must purchase them separately, which will cause a financial burden to the user, and the operation is also relatively cumbersome. Therefore, if the above three devices can be integrated, the production cost and user burden can be greatly reduced.

The functions of the color sensor, ambient light sensor, and video camera are outlined below.

color sensor

Generally speaking, on a personal computer device or a notebook computer, the components that can affect the color rendering of the human eye may include a video decoder (Video Decoder), a graphics chip (VGAChip), and a liquid crystal display panel. The impact of the liquid crystal display panel is the most significant, and as the time of using the liquid crystal display panel increases, the aging phenomenon of the panel will cause the color output quality of the product to change with the increase of the use time.

Therefore, in order to describe the influence of the color quality among the above-mentioned different components and the phenomenon of panel aging, there are many kinds of color sensors on the market to provide users with description and correction of the color distribution of the display device.

In addition to the larger dynamic range than that of ordinary video camera sensors, the color sensor can output light energy in accordance with the CIE standard chromaticity system XYZ (XYZ is the Device-Independent Color Space (Device-Independent Color Space) defined by CIE).

video camera

At present, there are many electronic devices (for example: notebook computers, LCD TVs, mobile phones, or PDAs) on the market with built-in video cameras to provide functions such as video conferencing or video chatting. In consideration of cost, most of the sensor spectral response (Sensor Spectral Responsivity) of commercially available video cameras is nonlinearly related to the CIE standard chromaticity system XYZ, also known as non-colorimetric sensors (Non-Colorimetric sensors). Therefore, general video cameras can only output device dependent colors (Device Dependent Colors), but cannot output device independent colors like color sensors.

ambient light sensor

Ambient light brightness sensing automatically adjusts the screen brightness according to changes in the ambient light source, so that it reaches the optimum level acceptable to the user's eyes. For example: when the user is presenting in a conference room with dim light, reduce the brightness of the screen to avoid excessive contrast causing discomfort to the user.

Since the above-mentioned color sensor, ambient light sensor, and video camera all have sensors capable of sensing light, current notebook computers are usually equipped with a built-in camera. Therefore, if the built-in camera can simultaneously have functions such as a color sensor, an ambient light sensor, and a video camera, the electronic device with the built-in camera will have additional additional functions, making the finished product more competitive.

Contents of the invention

An object of the present invention is to provide a reflective optical device, a color calibration method, and an electronic device for color measurement using a built-in camera and the reflective optical device.

Another object of the present invention is to provide a reflective optical device, a color correction method and an electronic device, so that the built-in camera can simultaneously provide the functions of a color sensor and an ambient light sensor.

According to a characteristic of the present invention, a color correction method is provided, which uses a built-in receiver and a color correction system in an electronic device to correct the color of a display of the electronic device, and is characterized in that the method includes the following The above steps:

generate a light from the display;

reflecting the light to the receiver with a reflective optic; and

Using the color correction system to perform color correction using the signal generated by the receiver after receiving the light includes the following steps:

using a mirror compensation matrix to compensate a degraded chromaticity signal in a first color block-related information ray in the ray, so as to obtain a compensated chromaticity signal;

correcting the compensated chrominance signal using a camera correction matrix to obtain a reduced XYZ chrominance signal; and

A color profile is generated according to the reduced XYZ chrominance signal.

The color profile is generated according to the reduced XYZ chrominance signal under a shaping/matrix model.

Wherein the first color block has multiple digital RGB values.

The color profile is obtained by using an optimization method to parameterize the three-dimensional corresponding relationship between the plurality of digital RGB values and the reduced XYZ chrominance signal.

Wherein using the mirror compensation matrix comprises the following steps:

generating a second color patch, and providing a ray with information related to the second color patch;

using the reflective optical device to reflect the light with the information about the second color block, so that the light with the information about the second color block is received by a first color analyzer to obtain a reflected XYZ chromaticity signal;

using a second color analyzer to receive the light with information about the second color patch to obtain a first direct XYZ chromaticity signal; and

The mirror compensation matrix is obtained by using a least squares method for the reflected XYZ chromaticity signal and the first direct XYZ chromaticity signal.

Wherein the camera correction matrix is obtained using the following steps:

generating a third color patch, and providing a ray with information related to the third color patch;

using the reflective optical device to reflect the light with the information about the third color block, so that the light with the information about the third color block is received by the built-in camera to obtain a linear RGB chromaticity signal;

Compensating the linear RGB chromaticity signal by using the mirror compensation matrix to obtain a compensated RGB chromaticity signal;

using a third color analyzer to receive the light having information about the third color patch to obtain a second direct XYZ chromaticity signal; and

The camera correction matrix is obtained for the compensated RGB chrominance signal and the second direct XYZ chrominance signal by using a least squares method.

According to another feature of the present invention, an electronic device is provided, which is characterized in that it includes:

a display that emits a light;

a receiver;

A reflective optical device, which includes a first reflector, and a second reflector substantially perpendicular to the first reflector, the light is reflected by the first reflector and the second reflector, and then enters the receiver; and

A color correction system, which uses the signal generated by the receiver to receive the light to perform color correction, the color correction system includes:

a processor, coupled to the receiver, for executing a program code; and

a storage memory, coupled to the processor, for storing the program code;

The program code includes:

using a mirror compensation matrix to compensate a degraded chromaticity signal in a first color block-related information ray in the ray, so as to obtain a compensated chromaticity signal;

correcting the compensated chrominance signal using a camera correction matrix to obtain a reduced XYZ chrominance signal; and

A color profile is generated according to the reduced XYZ chrominance signal.

8. The electronic device according to claim 7, wherein the color correction system comprises:

a processor, coupled to the receiver, for executing a program code; and

A storage memory, coupled to the processor, for storing the program code; wherein the program code includes:

using a mirror compensation matrix to compensate a degraded chromaticity signal in a first color block-related information ray in the ray, so as to obtain a compensated chromaticity signal;

correcting the compensated chrominance signal using a camera correction matrix to obtain a reduced XYZ chrominance signal; and

A color profile is generated according to the reduced XYZ chrominance signal.

Wherein the receiver is a built-in video camera.

Wherein the built-in camera senses an RGB chrominance signal within a specific range, and then converts the RGB chrominance signal into an XYZ chrominance signal through a camera correction matrix for Y value in the XYZ chrominance signal To know the ambient light brightness sensed by the built-in camera.

Wherein, the reflective optical device also includes a hanger and a housing, the hanger is connected to the housing, and the first lens, the first reflector, the second reflector, and the second lens All are assembled in the shell.

Wherein, the processor of the color correction system generates the color profile according to the reduced XYZ chrominance signal under a shaping/matrix model.

Wherein the first color block has multiple digital RGB values.

The processor uses an optimization method to parameterize the three-dimensional corresponding relationship between the plurality of digital RGB values and the reduced XYZ chrominance signal to generate the color description file.

Description of drawings

In order to further illustrate the specific technical content of the present invention, below in conjunction with embodiment and accompanying drawing detailed description as follows, wherein:

FIG. 1 is a schematic diagram of a color measurement using a built-in camera and a reflective optical device according to a preferred embodiment of the present invention.

FIG. 2 is a side view of a reflective optical device hung on a display of an electronic device according to a preferred embodiment of the present invention.

FIG. 3 is a flow chart of establishing a mirror compensation matrix in a preferred embodiment of the present invention.

FIG. 4 is a flow chart of functional blocks for obtaining mirror compensation matrices in a preferred embodiment of the present invention.

FIG. 5 is a flowchart showing the establishment of a camera correction matrix according to a preferred embodiment of the present invention.

FIG. 6 is a functional block flow chart of obtaining a camera correction matrix in a preferred embodiment of the present invention.

FIG. 7 is a flowchart of color description using a built-in camera according to a preferred embodiment of the present invention.

FIG. 8 is a functional block flow chart of color description using a built-in camera according to a preferred embodiment of the present invention.

FIG. 9 is a functional block diagram of an electronic device.

Detailed ways

A preferred embodiment of the present invention provides a reflective optical device so that a receiver built in an electronic device can function as a color sensor and a brightness sensor.

For the description of the reflective optical device, please refer to FIG. 1, FIG. 2, and FIG. 9 together, wherein FIG. 1 shows a schematic diagram of color measurement using a built-in receiver 1 with a reflective optical device 2, and FIG. 2 shows A side view of the reflective optical device 2 hanging on the display 31 of the electronic device 3 , and FIG. 9 shows a functional block diagram of the electronic device 3 .

In FIG. 1, the built-in receiver 1 is set on one side of the display 31 of the electronic device 3, and the reflective optical device 2 is hung on the display 31, and its hanging position is the same as that of the built-in receiver 1. correspond to each other. In this embodiment, the electronic device 3 is a notebook computer device. In other embodiments, the electronic device 3 can be a personal computer device, a server, or a portable electronic device and other electronic products. Of course, in other embodiments, the size of the reflective optical device 2 is also proportional to the size of the display on which it is mounted.

In FIG. 2, the light emitted by the display 31 can pass through the function of the reflective optical device 2 and return to the built-in receiver 1 assembled in the display 31 itself. The receiver 1 is also signally connected to a color correction system 24. The color correction system 24 is implemented by hardware or software in the electronic device 3. The above reflective optical device 2 includes a hanger 21 and a housing 22 , wherein the hanger 21 and the housing 22 are connected to each other. The casing 22 further includes lenses 221 , 224 and mirrors 222 , 223 .

In FIG. 9 , the electronic device 3 includes a built-in receiver 1 , a processor 32 , and a storage memory 33 . The processor 32 is coupled to the built-in receiver 1 and the storage memory 33 respectively. The built-in receiver 1 can be used to receive a light provided by the display 31 with information about the first color block. The processor 32 is used to execute a program code stored in the storage memory 33 . In this embodiment, the storage memory 33 is a volatile memory, such as a synchronous dynamic random access memory (SDRAM). In other embodiments, the storage memory 33 can also be a non-volatile memory, such as a flash memory. In addition, the program code includes: using a mirror compensation matrix to compensate the degraded chrominance signal in the information light related to the first color block to obtain a compensated chrominance signal; using a camera correction matrix to correct the compensation the chrominance signal to obtain a reduced XYZ chrominance signal; and generate a color profile according to the reduced XYZ chrominance signal. A further description of the operation of the program code will be described in detail later.

The aforementioned lens 221 is assembled in one of the openings of the housing 22 to receive the light emitted by the display 31. The light emitted by the display 31 will pass through the lens 221 to become a transmitted light, and the transmitted light will travel along the light path. The path 23 reaches the mirror 222.

The reflector 222 is assembled in the casing 22 , and the reflector 222 corresponds to the lens 221 . When the aforementioned transmitted light reaches the reflector 222, the angle between the transmitted light and the reflector 222 is 45 degrees, so the reflector 222 will totally reflect the transmitted light, making it the first reflected light, and the first reflected light will follow the light The path 23 reaches the mirror 223.

Similarly, the reflector 223 is also assembled in the casing 22 , and the reflector 223 and the reflector 222 are substantially vertically arranged at 90 degrees. When the first reflected light reaches the reflector 223, the angle between the first reflected light and the reflector 223 is 45 degrees, so the reflector 223 also totally reflects the first reflected light, making it become the second reflected light, and the second reflected light The reflected light will reach the lens 224 along the optical path 23 .

The lens 224 is assembled at another opening of the housing 22 , and the lens 224 corresponds to the mirror 223 to receive the second reflected light reflected by the mirror 223 . The second reflected light passes through the lens 224 and arrives at the receiver 1 along the optical path 23 . In FIG. 2, the receiver 1 is a built-in video camera. In other implementations, the receiver 1 may also be a color analyzer.

In addition, in this embodiment, in order to avoid stray light scattering from affecting the sensing results of the receiver (which can be a built-in camera 1 or a color analyzer), a part of the non-ideal optical path in the reflective optical device 2 is implemented. Irregular surface treatment to reduce the interference of stray light.

When the light emitted by the display 31 passes through the reflective optical device 2 and returns to the receiver 1, the light received by the receiver 1 may be attenuated by the reflectivity of the reflective mirrors 222 and 223 of the reflective optical device 2 (Distortion). Therefore, in order to keep the color profile obtained by the built-in receiver 1 with respect to the display 31 with high accuracy, in this preferred embodiment, the color correction system 24 is used to provide appropriate adjustments for the reflectivity changes of the mirrors 222 and 223 at different wavelengths. compensate. In addition, the sensors of general consumer built-in cameras are non-colorimetric sensors (Non-Colorimetric Sensors), and their spectral response (Sensor Spectral Response) is mostly non-linearly related to the CIE standard chromaticity system XYZ, so the color correction system 24 A calibration process must be performed on the built-in camera 1 . The reflectance compensation of the mirrors 222 and 223 by the color correction system 24 and the correction process of the built-in camera will be described respectively below.

Reflectivity Compensation for Mirrors

For the description of the reflectance compensation of the mirror by the color correction system 24, please refer to FIG. 3 and FIG. 4 together, wherein FIG. 3 shows a flowchart for establishing a mirror compensation matrix, and FIG. 4 shows a functional block for obtaining a mirror compensation matrix. flow chart.

First, use the color block generation program 41 installed in the electronic device 3 to generate a plurality of different digital RGB values, so that the display 31 of the electronic device 3 to be corrected displays color blocks with a plurality of different colors, and emits a color block related to the color block. information light (step S310).

Next, use the first color analyzer 44 and the second color analyzer 45 to directly and indirectly pass through the reflective optical device 2 respectively to measure the color blocks generated by the display 31 .

For example: use the reflective optical device 2 to reflect the light with the information about the color block emitted by the display 31 (step S315), so that the first color analyzer 44 electrically connected to the electronic device 3 can receive the light with the color block information. The first color analyzer 44 will send the detected result to the electronic device 3 (step S320). Then, use the color measurement program installed in the electronic device 3 to process the result detected by the first color analyzer 44 to obtain a reflected XYZ chromaticity signal (step S325 ).

In addition, the second color analyzer 45 is used to directly detect the light emitted by the display 31 with information about the color block, wherein the second color analyzer 45 is also electrically connected to the electronic device 3 (step S330 ). After the second color analyzer 45 detects the light with the relevant information of the color block, it will send the detected result to the electronic device 3 for using the color measurement program installed in the electronic device 3 to check The detected results of the second color analyzer 45 are processed to obtain a first direct XYZ chromaticity signal (step S335 ).

After obtaining the reflected XYZ chrominance signal (with complex group reflected XYZ values) and the first direct XYZ chrominance signal (with complex group direct XYZ values), use a 3×3 matrix and use the least squares method (Least Squares Estimation, LSE) Calculate the mirror compensation matrix in the reflective optical device 2 (step S340). In this embodiment, a first-order regression model (First-OrderModel) is used to find the mirror compensation matrix to describe the corresponding relationship of direct XYZ<->reflection XYZ. In other embodiments, a higher-order regression model (Higher-Order Model), a neural network, or other linear methods may also be used to describe the correspondence relationship of direct XYZ<->reflection XYZ.

Calibration of the built-in camera

Please refer to FIG. 5 and FIG. 6 together for the description of the calibration of the built-in camera by the color calibration system 24 , wherein FIG. 5 shows a flow chart of establishing a camera calibration matrix, and FIG. 6 shows a flow chart of functional blocks for obtaining a camera calibration matrix.

Similar to the above description, the color block generation program 61 is firstly used to generate a plurality of different digital RGB values, so that the display 31 displays a plurality of color blocks with different colors, and emits light with information about the color block (step S510 ).

Next, the reflective optical device 2 is used to align the built-in camera to the color blocks generated by the display 31 for measurement. That is, the reflective optical device 2 is used to reflect the light emitted by the display 31 with the relevant information of the color patch (step S515), so that the built-in camera assembled in the electronic device 3 can receive the light with the relevant information of the color patch. light, and convert it from optical signal to electrical signal, and then the built-in camera performs analog-to-digital conversion on the generated electrical signal to obtain a linear RGB chrominance signal 65 (step S520). Then, the linear RGB chromaticity signal 65 is compensated by using the previously obtained mirror compensation matrix 66 to obtain a compensated RGB chromaticity signal 67 (step S525 ).

In addition, the third color analyzer 68 electrically connected to the electronic device 3 is used to directly detect the light emitted by the display 31 with information related to the color block (step S530 ). After the third color analyzer 68 detects the light with the relevant information of the color block, it will send the detected result to the electronic device 3 for use by the color measurement program installed in the electronic device 3 The detected results of the third color analyzer 68 are processed to obtain a second direct XYZ chrominance signal (step S535 ).

After obtaining the compensated RGB chrominance signal 67 and the second direct XYZ chrominance signal, a camera correction matrix is obtained again with a 3×3 matrix and the least square method (step S540 ).

Because most of the current displays are liquid crystal displays, and the backlight of the liquid crystal display will age after being used for a period of time (for example: 2 years). A built-in camera and reflective optics are provided for color profiling and correction of displays with aging backlights. In addition, the above-mentioned mirror compensation matrix and camera correction matrix can be set and completed during the production stage of the electronic equipment, so when users want to perform color description and correction on the display, they can conveniently use the built-in camera to achieve it. For explanation, please refer to FIG. 7 and FIG. 8 together, wherein FIG. 7 shows a flow chart of color description using a built-in camera, and FIG. 8 shows a flow chart of functional blocks using a built-in camera for color description.

First, utilize the color block generating program 81 installed in the electronic device 3 to generate a plurality of different digital RGB values, so that the display 31 to be corrected displays color blocks with a plurality of different colors, and emits light having relevant information of the color blocks ( Step S710).

Next, the reflective optical device 2 is used to rotate the built-in camera 1 to the color block generated by the display 31 for measurement. That is, the reflective optical device 2 is used to reflect the light emitted by the display 31 with the relevant information of the color patch (step S715), so that the built-in camera 1 assembled in the electronic device can receive the light with the relevant information of the color patch. light to obtain the lower RGB chrominance signal 85 (step S720). Then, the downgraded RGB chrominance signal 85 is compensated by using the previously obtained reflector compensation matrix 86 to obtain a compensated RGB chrominance signal 87 (step S725 ).

Then, the camera correction matrix 88 is used to correct and compensate the RGB chrominance signal 87 to be converted into a lower-order XYZ chrominance signal 89 (step S730 ). Finally, under the use of the shaping/matrix model, a multi-dimensional optimization method (for example: Powell multidimensional optimization) is used to convert the digital RGB values generated by the color block generation program 81 and the descending XYZ chrominance signal 89. The three-dimensional corresponding relationship is parameterized to obtain the color description file of the aging display 31 by the built-in camera 1, wherein the color description file may include the current display's color gamut range (Gamut), tone reproduction curve (Tone Reproduction Curve) , White point and dark point color coordinates and other information.

In addition, the built-in camera provided by the embodiment of the present invention can not only provide the function of the color sensor, but also provide the function of the ambient light brightness sensor. Traditional ambient light brightness sensors usually only have one photosensitive component, but the built-in camera provided by the present invention includes a photosensitive array, and the photosensitive array can obtain information on all brightness distributions within a specific range, so it can use The simultaneous contrast (Simultaneous ContrastRatio) is obtained from the brighter and darker luminance distributions, and the result can be considered together with the maximum luminance as the basis for the electronic device 3 to automatically adjust the luminance.

For example: the color description file customized by the built-in camera for the display previously recorded the maximum brightness allowed by the current screen brightness. Under the premise of not exceeding the maximum brightness, use the camera correction matrix to convert the RGB color obtained by the built-in camera The chromaticity signal is converted into an XYZ chromaticity signal to obtain the Y value (brightness value) received by the built-in camera, that is, the built-in camera 1 senses the brightness of the ambient light. Then, the Y value is used as an index value to obtain an appropriate screen brightness value from a reference brightness table, so that the electronic device 3 can adjust the brightness of the display according to the appropriate screen brightness value. The reference brightness table is as follows:

Typical use environment Maximum brightness (cd/m²) Sync comparison Cinema 40 80:1 living room 100 20:1 office 200 5:1

It can also be seen from the above description that the embodiment of the present invention provides a reflective optical device to match the built-in camera, so that the built-in camera has the functions of a color sensor and a brightness sensor. In addition, in order to overcome the reflectivity change of the reflective mirror of the reflective optical device at different wavelengths, the embodiment of the present invention provides a mirror compensation matrix to compensate the optical signal received by the receiver, and in order to improve the spectral response of the built-in camera For the problem related to the non-linearity of the CIE standard chromaticity system, the embodiment of the present invention provides a camera correction matrix to calibrate the built-in camera, thereby realizing the function of the color sensor.

The above-mentioned embodiments are only examples for convenience of description, and the scope of rights claimed by the present invention should be based on the scope of the patent application, rather than limited to the above-mentioned embodiments.

Claims (13)

1. A color correction method, which utilizes a built-in receiver and a color correction system of an electronic device to correct the color of a display of the electronic device, it is characterized in that the method comprises the following steps: generate a light from the display; reflecting the light to the receiver with a reflective optic; and Using the color correction system to perform color correction using the signal generated by the receiver after receiving the light includes the following steps: using a mirror compensation matrix to compensate a degraded chromaticity signal in a first color block-related information ray in the ray, so as to obtain a compensated chromaticity signal; correcting the compensated chrominance signal using a camera correction matrix to obtain a reduced XYZ chrominance signal; and A color profile is generated according to the reduced XYZ chrominance signal. 2. The color correction method according to claim 1, wherein the color profile is generated according to the reduced XYZ chrominance signal under a shaping/matrix model. 3. The color correction method as claimed in claim 1, wherein the first color block has a plurality of digital RGB values. 4. The color correction method according to claim 2, wherein the color description file uses an optimization method to determine the three-dimensional corresponding relationship parameters between the plurality of digital RGB values and the reduced XYZ chromaticity signal acquired. 5. The color correction method according to claim 1, wherein using the mirror compensation matrix comprises the steps of: generating a second color patch, and providing a ray with information related to the second color patch; using the reflective optical device to reflect the light with the information about the second color block, so that the light with the information about the second color block is received by a first color analyzer to obtain a reflected XYZ chromaticity signal; using a second color analyzer to receive the light with information about the second color patch to obtain a first direct XYZ chromaticity signal; and The mirror compensation matrix is obtained by using a least squares method for the reflected XYZ chromaticity signal and the first direct XYZ chromaticity signal. 6. The color correction method according to claim 1, wherein the camera correction matrix is obtained by the following steps: generating a third color patch, and providing a ray with information related to the third color patch; using the reflective optical device to reflect the light with the information about the third color block, so that the light with the information about the third color block is received by the built-in camera to obtain a linear RGB chromaticity signal; Compensating the linear RGB chromaticity signal by using the mirror compensation matrix to obtain a compensated RGB chromaticity signal; using a third color analyzer to receive the light having information about the third color patch to obtain a second direct XYZ chromaticity signal; and The camera correction matrix is obtained for the compensated RGB chrominance signal and the second direct XYZ chrominance signal by using a least squares method. 7. An electronic device, characterized in that it comprises: a display that emits a light; a receiver; A reflective optical device, which includes a first reflector, and a second reflector substantially perpendicular to the first reflector, the light is reflected by the first reflector and the second reflector, and then enters the receiver; and A color correction system, which uses the signal generated by the receiver to receive the light to perform color correction, the color correction system includes: a processor coupled to the receiver; and a storage memory coupled to the processor; Wherein the processor uses a mirror compensation matrix to compensate for a reduced chromaticity signal in a first color block-related information ray in the ray, so as to obtain a compensated chromaticity signal; correcting the compensated chrominance signal using a camera correction matrix to obtain a reduced XYZ chrominance signal; and A color profile is generated according to the reduced XYZ chrominance signal. 8. The electronic device as claimed in claim 7, wherein the receiver is a built-in camera. 9. The electronic device according to claim 8, wherein the built-in camera senses an RGB chrominance signal within a specific range, and then converts the RGB chrominance signal into an XYZ through a camera correction matrix The chrominance signal is used to obtain the ambient light brightness sensed by the built-in camera from the Y value in the XYZ chrominance signal. 10. The electronic device according to claim 7, wherein the reflective optical device further comprises a hanger and a housing, the hanger is connected to the housing, and the first lens, the The first reflection mirror, the second reflection mirror and the second lens are all assembled in the casing. 11. The electronic device of claim 7, wherein the processor of the color correction system generates the color profile according to the reduced XYZ chrominance signal under a shaping/matrix model. 12. The electronic device as claimed in claim 7, wherein the first color block has a plurality of digital RGB values. 13. The electronic device according to claim 11, wherein the processor utilizes an optimization method to parameterize the three-dimensional corresponding relationship between the plurality of digital RGB values and the reduced XYZ chrominance signal Generate the color profile.

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