111 results about "Color sensor" patented technology

The application discloses a cyanide-containing slag tailing pond groundwater environment risk early warning system, a groundwater monitoring well subsystem comprises a plurality of groundwater monitoring wells; a timing sampling control subsystem is used for controlling the pumping time, flow and frequency of a water pump in each groundwater monitoring well; a color reaction subsystem comprises a color developing device and is used for monitoring the color developing reaction of the groundwater sample; a color sensing subsystem comprises a light source and a color sensor, the light source is irradiated towards the color developing device, and the color sensor is used for collecting the emergent light signal of the color developing device after the color developing reaction; a central control platform comprises an early warning subsystem and an emergency disposal response subsystem, the early warning subsystem receives the color sensor signal and divides the risk grade according to the obtained signal; the emergency disposal response subsystem executes corresponding detection and repair responses according to the risk grade made by the early warning subsystem; the application realizes the rapid detection of the cyanide content in the groundwater around the cyanide-containing slag tailing pond and the feedback and early warning of the environmental pollution risk grade.

The embodiment of the invention discloses a cigarette color film detection method, system and device and a storage medium, and the method comprises the steps: obtaining the front color data of a target cigarette based on a first color sensor, and determining the first color film detection result of the target cigarette based on the front color data; obtaining side color data of a target cigarette carton based on the second color sensor, and determining a second color film detection result of the target cigarette carton based on the front color data; and determining a target color film detection result of the target cigarette carton based on the first color film detection result and the second color film detection result. According to the technical scheme provided by the embodiment of the invention, the problem that the detection accuracy is insufficient due to the fact that image data shot by a single camera is adopted for color film anomaly analysis in the prior art is solved, the color data of the cigarette color film can be acquired from multiple angles based on the double-color sensor, and then fusion analysis is performed on the color data of the multiple angles, so that the detection accuracy is improved. And the detection accuracy of the cigarette color film is improved.

The invention discloses a detection tube for elemental mercury in natural gas, and a detection tube analysis device and method. The detection tube comprises a pressure-resistant detection tube body, a color sensor and a flow meter, the pressure-resistant detection tube body comprises a transparent pressure-resistant tube and a detection tube coaxially mounted in the transparent pressure-resistant tube, and a gap is formed between the outer wall of the detection tube and the inner wall of the transparent pressure-resistant tube to form a pressure-resistant cavity; the detection tube comprises a detection tube body, and the detection tube body is filled with a sulfur impregnated silica gel indication carrier; a color sensor is arranged on a sulfur-impregnated silica gel section outside the pressure resistance detection pipe body; the color sensor is electrically connected with the flow meter, and the flow meter is arranged at an outlet in the tail end of the pressure resistance detection pipe body. The mercury concentration in the natural gas is measured by adopting a detection tube method, detection can be completed on site, subsequent sample treatment and instrument analysis are not needed, the problems of complicated operation and long consumed time in the prior art are solved, and the detection efficiency and the data timeliness are improved.

1. Name of the product in this design: Color mark sensor (ESE-10N / P). 2. Purpose of this design: A color mark sensor for detecting color marks or specific color areas on the surface of an object. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

A natural gas chemical composition measurement and detection apparatus and method. The apparatus comprises: a detector tube (3), a pressure-resistant cavity (5), a color sensor (9), a pressure regulator (4), a flow detector (6), and a control device (10); an open end of the detector tube (3) is configured for connecting to a natural gas sample injection system; a first open end of the pressure-resistant cavity (5) is configured for securing the detector tube (3); a second open end of the pressure-resistant cavity (5) is in communication with an internal cavity of the pressure-resistant cavity (5), and is configured for connecting to the natural gas sample injection system and is connected to the flow detector (6) by means of the pressure regulator (4); the color sensor (9) is arranged on an outer side of the pressure-resistant cavity (5) and is configured for detecting a color change in the detector tube (3) at a sensing position; and the control device (10) is configured for turning off the flow detector (6) when the color sensor (9) detects a color change, and calculating a concentration of a component to be detected according to a color change length in the detector tube (3) and a volume of natural gas detected by the flow detector (6). The apparatus enables automatic natural gas sample injection, improves repeatability, reduces the complexity of sample injection processes, and improves detection accuracy and efficiency.

The utility model discloses a desk. The desk comprises a desk body; the lamp is fixed on the desk, and the color temperature of the lamp is adjustable; the controller is electrically connected with the lamp and used for adjusting the color temperature of the lamp; the color sensor is configured to detect environment color parameters, and the color sensor is electrically connected with the controller. According to the desk, the color sensor and the controller are arranged, so that the color temperature of the lamp can be automatically adjusted according to the actual environmental color change, a comfortable light source is further provided for a desk user, the desk user can work or learn under better environmental brightness, eye fatigue of the desk user is reduced, and the user experience is improved. Therefore, the comfort of the desk user can be improved.

The embodiment of the invention provides a mode selection method and device of a color sensor and the color sensor. The method comprises the following steps: acquiring a first color semaphore at a first position of a reference object and a second color semaphore at a second position of the reference object; calculating a normalized difference value related to a semaphore proportion of each color channel and a semaphore difference value related to a difference value corresponding to each color channel based on the first color semaphore and the second color semaphore; according to the normalized difference value and the semaphore difference value, a contrast mode or a color mode is selected, and the contrast mode and the color mode are used for judging whether the color semaphore of the object to be detected and the first color semaphore correspond to the same color or not. Therefore, the appropriate detection mode of the color sensor can be automatically selected according to the distribution characteristics of the colors in the actual detection scene, the labor cost is reduced, the detection accuracy and reliability are improved, and misjudgment is effectively avoided.

The utility model discloses a lifting motor, and relates to the technical field of motors. The device comprises a first shell and a protection mechanism, wherein the protection mechanism comprises a sleeve. By arranging the damping telescopic rod, the clamping groove and the clamping block, a stable guiding function is provided for the sleeve, it is ensured that the sleeve can stably move along a correct path under driving of the screw, in addition, when the sleeve is accidentally impacted or starts to slip, the damping telescopic rod can absorb part of impact energy, the falling speed of the sleeve is reduced, and the service life of the sleeve is prolonged. The stability and safety of the whole lifting system are improved, when the sleeve slides down abnormally, the push rod can be rapidly driven to enable the clamping block to be clamped into the clamping groove, so that the sleeve is effectively prevented from sliding down continuously, the color sensor is arranged near the sleeve to monitor the moving speed of the red coating in real time, and when the sliding speed of the sleeve is too high, the color sensor can be used for detecting whether the sleeve slides down or not. The color sensor immediately detects the rapid movement of the red coating and triggers an alarm or control signal.

This invention provides an automatic detection method and apparatus for identifying the orientation of cigarette packs, relating to the field of cigarette pack packaging technology. The method includes the following steps: S1: Acquire cigarette pack data; S2: Determine whether the cigarette pack has reached a preset detection position; if so, proceed to S3; otherwise, do not perform the operation; S3: Acquire real-time color information of at least one detection area of ​​the cigarette pack using at least one color sensor; S4: Determine whether the real-time color information falls within a standard color threshold range; if so, the cigarette pack orientation is correct and normal conveying is performed; otherwise, the cigarette pack orientation is abnormal and abnormal handling is performed. This invention, through optical non-contact detection technology combined with position sensing and color sensing, can effectively and automatically detect the rotation, vertical reversal, and horizontal reversal of cigarette packs. It allows for rapid production changeover, high detection efficiency, high accuracy, and low risk of missed or false detections. It enables real-time online automatic non-contact detection of cigarette pack orientation, effectively improving the quality and efficiency of cigarette pack packaging.

A device (10a) for imaging a sample (12) including a material that interacts with microwave radiation is provided The device (10a) comprises a sample holder (16) for supporting the sample (12) in a sample area, a quantum sensor device (18) configured to be arranged adjacent to the sample area, the quantum sensor device (18) including colour sensors, an excitation light source (30) configured to generate excitation light for energetically exciting the colour sensors, an optical sensor (32) including a plurality of pixels and configured to generate electronic signals indicative of an intensity of the light emitted by the colour sensors, imaging optics (28) for projecting the sensor area onto the optical sensor (32), a microwave source (20) having a microwave antenna for emitting microwave radiation, the microwave source (20) being configured to generate microwave radiation that is characterized by a plurality of parameters, and a controller (24). The sample holder (16) supports the sample (12) such that the sensor area is in the near-field of the microwave radiation interacting with the sample (12), wherein the controller (24) is configured to vary at least one parameter of the microwave radiation at least between a first value and a second value, record – for each pixel – the electronic signals received from the optical sensor (32) for the microwave radiations generated using the first value and the second value, determine – for each pixel – changes in the electronic signals between the microwave radiations generated using the first value and the second value, and generate an image based on the changes for each pixel, the changes for each pixel indicating variations in the interaction of the microwave radiation with the sample (12).

The utility model relates to an automatic multi-specification paper taking mechanism which comprises a mechanical arm and is characterized in that the mechanical arm is connected with a paper taking frame through a flange, the paper taking frame is composed of an electromagnetic valve set, a sectional material, a connecting clamping plate and a carbon fiber square tube, and an overpressure sensor, a color sensor, an on-site sensor, a long-distance sensor and a suction cup assembly are installed on the carbon fiber square tube. An air blowing assembly and a paper clamping assembly. The automatic paper taking device has the advantages that the paper clamping assembly, the blowing assembly and the suction cup assembly are controlled through the A-area electromagnetic valve combination, paper in the A-area can be taken, the paper in the A-area and the B-area can be taken through the A-area and B-area electromagnetic valve combination, the color sensor identifies whether the uppermost layer is glass or paper, and the paper taking mechanism takes the paper only when the upper layer of glass is taken away. And after the paper is clamped, the blowing assembly blows air to separate the paper from the next layer of glass, so that the paper can be taken out smoothly.

The present application relates to mercury pollution treatment technical field, especially laboratory mercury pollution automatic processing method, the method includes the following steps: step S1: the mercury waste gas is from the air inlet pipe into the pretreatment pool, so that the mercury waste gas is contacted with the absorption liquid to absorb the mercury waste gas; Step S2: when the absorption liquid changes color, the first color sensor sends a signal to the control host, the control host controls the multiple electric telescopic rod to drive the shielding block to move, so that the air outlet pipe is opened, the control host controls the first valve to open, so that the absorption liquid is contacted with the filter material through the liquid outlet pipe into the filter tank to reduce mercury ions to metallic mercury; The present application can accurately and efficiently treat mercury vapor, mercury waste liquid and find mercury leakage in time, so as to guarantee the personal safety of the experimenter.

The invention relates to the technical field of natural gas detection, and provides a natural gas stoichiometric detection device and method.The device comprises a detection pipe, a pressure-resistant cavity, a color sensor, a pressure regulator, a flow detector and a control device; the open end of the detection pipe is used for being connected with a natural gas sampling system; the first opening end of the pressure-resistant cavity is used for fixing a detection tube; a second opening end of the pressure-resistant cavity is communicated with an inner cavity of the pressure-resistant cavity and is used for being connected with a natural gas sampling system and being connected with a flow detector through a pressure regulator; the color sensor is arranged on the outer side of the pressure-resistant cavity and is used for detecting the color change of the detection tube in the sensing position; and the control equipment is used for closing the flow detector when the color sensor detects color change, and calculating the concentration of the to-be-detected component according to the color change length of the detection tube and the natural gas volume detected by the flow detector. The device provided by the invention can realize automatic sampling of natural gas, improve repeatability, reduce operation difficulty of sampling, and improve detection accuracy and efficiency.

This utility model discloses a self-unloading semi-trailer with a lifting loading and unloading platform, including a semi-trailer cargo box. A fixed cylinder is fixedly connected to the surface of the semi-trailer cargo box, and an adjusting plate is slidably connected to the inner wall of the fixed cylinder. Multiple unloading plates are fixedly connected to the surface of the adjusting plate, and multiple unloading holes are opened on the surface of the semi-trailer cargo box. Multiple sets of guide plates are fixedly connected to the inner bottom wall of the semi-trailer cargo box, and multiple cargo boxes are placed between a pair of guide plates. In this utility model, the adjusting plate slides upward under the action of a lead screw. When the height of the color sensor corresponds to the height of the color mark, the color sensor senses the color at the color mark position and, through an electrical signal, controls the output end of the multi-stage electric telescopic rod to drive the push plate to send the cargo box onto the unloading plate. At this time, the output end of the forward and reverse motor drives the lead screw to reverse, driving the adjusting plate and the unloading plate to descend as a whole. The advantage of this is that it realizes rapid and automatic lifting and unloading operations.

This invention belongs to the field of stationery technology and discloses a multi-color sensor-activated lead-ejection pen, including a shell, an operating mechanism, a pressing mechanism, a ball bearing, and multiple lead refills. The shell has multiple lead-ejection markings. The operating mechanism is housed within the shell and can move axially along the shell. The pressing mechanism includes multiple pressing elements, each corresponding to a lead-ejection marking, arranged in an array within the shell, spaced apart from the operating mechanism to form a receiving space. The ball bearing is movably disposed within the receiving space and can roll between any pressing element and the operating mechanism, allowing the operating mechanism to apply pressure to any pressing element via the ball bearing. Each lead refill corresponds to a pressing element and is connected to it, with the pressing element pushing the lead refill out of the shell. This multi-color sensor-activated lead-ejection pen allows control of multiple lead refills through a single operating mechanism, effectively simplifying the structure and operation steps. It solves the problems of excessive buttons, complex structure, cumbersome operation, and susceptibility to misoperation in existing multi-color pens.

The utility model belongs to the technical field of medical instruments, and particularly relates to a blood leakage monitoring device of blood purification equipment, which comprises a transparent glass tube, a transmitting end component and a receiving end component, the transmitting end component is fixedly connected with the receiving end component, and a containing cavity is formed between the transmitting end component and the receiving end component. The transparent glass tube penetrates through and is fixed in the containing cavity, the transparent glass tube is vertically arranged, a light source and a light source circuit board are arranged in the transmitting end assembly, the transmitting end assembly is provided with a transmitting channel communicated with the light source and the containing cavity, and a color sensor and a sensor circuit board are arranged in the receiving end assembly. The receiving end assembly is provided with a receiving channel communicated with the color sensor and the containing cavity, and the transmitting channel and the receiving channel are oppositely arranged. No gap exists in the transparent glass tube, bubbles in the pipeline can be rapidly discharged from the transparent glass tube and cannot be reserved in the transparent glass tube, the transmitting end assembly and the receiving end assembly are arranged in a split mode, and replacement and inspection of parts are facilitated.

The utility model relates to the technical field of color mixing devices, and discloses a dispersion kettle automatic backflow color mixing device which comprises a dispersion kettle body and a circulating pipe, the circulating pipe is communicated with the upper end and the lower end of the dispersion kettle body, and a circulating pump, a micro mixer and a toner adding pipe are sequentially installed on the circulating pipe from the upper end to the lower end. The color sensor can detect the color of a material passing through the circulating pipe in real time and compare the color with a target color, an obtained data signal is fed back to the control assembly finally, and a control system in the control assembly controls the adding amount of the toner in the toner adding pipe through the metering pump according to the obtained data, so that the toner adding efficiency is improved. And after the required color standard is reached, the metering pump is closed to stop adding the toner into the circulating pipe, so that automation of the color mixing process is realized, manual operation errors are reduced, the production efficiency is improved, data recording and tracing are facilitated, and quality control is facilitated.

A method for generating a calibration parameter for light sources includes activating at least one LED of a plurality of multicolor LEDs of a light source and measuring a color of the at least one LED in a first color space. The method also includes scaling the color of the at least one LED relative to the plurality of multicolor LEDs, obtaining a plurality of scaled color measurements, and calculating a calibration matrix based on the plurality of scaled color measurements.

The application relates to a new energy battery shell material conveying device and a conveying method applied to the field of conveying devices. Through the setting of the expansion belt body with the self-resetting roll and the spread control assembly, partial water stains of the battery shell with water stains can be adsorbed and pretreated during the conveying process, the water content of the battery shell when conveying reaches the drying device is greatly reduced, the time required for subsequent drying of the battery shell is effectively accelerated, in addition, under the action of the color sensor during the conveying process, the spread of the expansion belt body can be controlled according to the water content of the surface of the expansion belt body, so that the water stain adsorption capacity on the battery shell is increased, the water loss speed of the expansion belt body itself is also accelerated, the water stain adsorption of the battery shell is continuously facilitated, and the water content of the battery shell is reduced without affecting the conveying efficiency, so that subsequent drying treatment is facilitated.

The utility model relates to a kind of sponge winding device and sponge production line, including base, reel assembly and detection component;Reel assembly includes support tube, reel and belt conveyor;Detection component includes the light source and color sensor of opposite arrangement, and the sponge that sponge ring cutting machine exports is after entering between reel and belt conveyor after passing through light source and color sensor and finally winds on reel.This sponge winding device can identify sponge bonding area by setting color sensor and light source, so as to replace artificial naked eye identification sponge joint, not only reduce the labor intensity of staff, but also can avoid the occurrence of missed detection, and cooperate with reel assembly to make the joint identified stop when moving to the rear of reel, facilitate staff to paste aluminum foil tape to joint in the side away from equipment, convenient operation has higher security.

The utility model discloses a rubber string wrapping machine, which relates to the technical field of clothing manufacturing, and comprises a rack, a top seat, a first roller, a second roller, a fixed seat, a movable seat, a sewing machine, a deviation rectifying mechanism, an edge blocking mechanism, a color sensor and a controller, and the sewing machine, the deviation rectifying mechanism, the edge blocking mechanism and the color sensor are respectively connected with the controller. Through the arrangement of the first roller, the second roller, the fixed seat, the movable seat, the sewing machine, the deviation correcting mechanism, the edge blocking mechanism, a color sensor and a controller, the tightness of the rubber string and the cloth can be automatically adjusted, the position of the edge of the cloth can be automatically adjusted, automatic sewing of the cloth and the rubber string is achieved, the sewing precision can be improved, and the sewing efficiency is improved. And the product quality is improved.

The present invention discloses a hydrogen conductivity meter resin column regeneration mechanism, which comprises: a color sensor for detecting the color of a hydrogen conductivity meter resin column, generating a first signal when the color sensor detects a first color, and generating a second signal when the color sensor detects a second color; the regeneration device is used for providing regeneration liquid; the control device is electrically connected with the color sensor and the regeneration device; wherein the control device is communicated with the regeneration device and the hydrogen conductivity meter resin column according to a first signal, so that regenerated liquid flows to the hydrogen conductivity meter resin column; the control device disconnects the regeneration device and the hydrogen conductivity meter resin column according to the second signal. The invention further discloses a water vapor system adopting the hydrogen conductivity surface resin column regeneration mechanism. According to the technical scheme, the regeneration process of the hydrogen conductivity surface resin column is improved, and the labor cost is saved.

A portable custom cosmetic pigment dispenser creates a cosmetic pigment mixture that closely matches a person's skin color. The device is constructed with a color sensor at one end that scans the skin and records color values in a color space. A processor converts the color values into a colorspace. In one example, a user is presented with a sample of the color as determined by the processor and has an opportunity to accept or modify the color. Specific quantities of colored pigment are selected based on the corresponding weightings in the color space.

The invention discloses a carbon dioxide polymer detection tube and a rapid analysis device and method. The carbon dioxide polymer detection tube comprises a pressure-resistant detection tube body, a color sensor and a flow meter, the pressure-resistant detection tube body comprises a transparent pressure-resistant tube and a detection tube coaxially mounted in the transparent pressure-resistant tube, and a gap is formed between the outer wall of the detection tube and the inner wall of the transparent pressure-resistant tube to form a pressure-resistant cavity; the front end in the detection tube body is filled with hydrogen sulfide absorption impregnated silica gel, and the rear end of the detection tube body is filled with NaOH impregnated silica gel; a color sensor is arranged on the NaOH impregnated silica gel pipe section outside the pressure resistance detection pipe body; the color sensor is electrically connected with the flow meter, and the flow meter is arranged at a tail end outlet of the pressure resistance detection pipe body. According to the invention, the detection tube with the micron-sized inner diameter and the silica gel carrier with the particle size of 1-100 microns are adopted, so that a color-changing interface is narrower and clearer; the front end of the detection tube is filled with hydrogen sulfide absorption impregnated silica gel, so that interference of hydrogen sulfide on carbon dioxide detection is eliminated, and the measurement accuracy and detection precision of carbon dioxide are improved.

A surgical robotic system includes a laparoscopic access port having a color mark, and a surgical robot arm including a port latch releasably coupled to the access port. The system also includes a color sensing module including a color sensor to detect a color of the color marker and a system controller to determine a type of the access port based on the detected color.

The invention relates to the technical field of clothes treatment, in particular to clothes treatment equipment, a control method thereof and a storage medium. The clothes processing equipment comprises a color sensor and a wireless energy supply structure; the color sensor is located in a clothes processing cavity of the clothes processing equipment and used for detecting the color of clothes in the clothes processing cavity. The wireless energy supply structure comprises a first charging coil and a second charging coil; the first charging coil is located in the clothes processing cavity and electrically connected with the color sensor. And the processor is in communication connection with the color sensor and is used for determining running parameters of clothes processing operation according to the color of the clothes in the clothes processing cavity. According to the technical scheme, the care effect of the clothes treatment equipment on the clothes during clothes treatment is improved, and the use experience of a user is improved.

The utility model discloses a punching and cutting integrated device for a safety belt. The device comprises a workbench and a conveying device used for conveying braids. An equipment frame is arranged on the workbench, and a punching device and a cutting device are arranged in the equipment frame. The conveying device comprises a conveying mechanism arranged on the table top of the workbench and a feeding mechanism arranged beside the workbench. The conveying mechanism comprises a plurality of sets of idler wheels arranged along a straight line, a plurality of limiting blocks and a color sensor. The idler wheels located between the punching device and the cutting device are connected with a servo motor. The feeding mechanism comprises a pulley and a motor. The punching and cutting integrated machine has the advantages that the punching process and the cutting process are integrated, compared with a traditional mode that machining is conducted at two stations, more time and labor are saved, the automation degree is high, the production efficiency is greatly improved, meanwhile, machining consistency is guaranteed, and the product percent of pass is higher; and the cutting length of finished products can be adjusted by setting the conveying distance of the servo motor, production is more flexible, and the applicability is wider.

The application discloses a plasma separation device, which comprises a shell, a cavity arranged in the shell, an opening arranged on the cavity, a sealing mechanism hinged at the opening, a support platform arranged in the cavity, a plurality of slidingly connected limiting pieces arranged on the support platform, a magnetic attraction fixing piece arranged in the cavity, one end of the magnetic attraction fixing piece being insertedly fixed with the sealing mechanism, the magnetic attraction fixing piece facing the plurality of limiting pieces respectively, a plurality of color sensors fixed on the bottoms of the corresponding limiting pieces respectively, a plurality of pushing components arranged on the support platform and arranged in one-to-one correspondence with the plurality of limiting pieces respectively, the driving end of the pushing component being detachably connected with the corresponding limiting piece, and a driving mechanism arranged in the cavity. Therefore, the separation time of different plasma can be reasonably controlled, the separation effect of the plasma is improved, and unnecessary sample loss is avoided.

The invention discloses a semi-automatic spherical surface facing machine and belongs to the technical field of spherical surface grinding, the semi-automatic spherical surface facing machine comprises a workbench, a grinding assembly and a driving assembly.According to the scheme, a curved surface is directly sensed through a plurality of mechanical measuring rods, optical shielding is driven through extrusion deformation of an air bag, and finally signals are interpreted through a color sensor; an expensive and delicate electronic displacement sensor array is abandoned, so that the overall manufacturing cost and maintenance cost are greatly reduced, meanwhile, a mechanical structure has inherent high reliability and strong anti-interference capability and can adapt to complex environments such as oil stain and vibration in a workshop site, and the whole detection process is accurate and reliable from calibration, scanning to signal generation, and the detection precision is greatly improved. The method is simple in operation, is completed in simple mechanical and pneumatic actions, is high in detection speed, can be seamlessly matched with the rhythm of an automatic production line, achieves high-efficiency and low-cost online residue screening, and guarantees the quality uniformity of workpieces input into a grinding process from the source.

The embodiment of the present disclosure relates to an image processing method and device, electronic equipment and storage medium, and relates to the technical field of images. The image processing method comprises the following steps: acquiring a to-be-processed image, and dividing the to-be-processed image to obtain a plurality of image blocks; acquiring color temperature information of each image block, and determining local color temperature information of each image block through a color sensor array; determining target color temperature information of each image block according to the color temperature information and the local color temperature information, and acquiring a color correction gain matrix of the target color temperature information; processing color information of the image block according to the color correction gain matrix, acquiring target color information of the image block, and generating a target image corresponding to the to-be-processed image. The technical solution in the embodiment of the present disclosure can improve the accuracy of color correction.