19 results about "Color tests" patented technology

A color checker device is disclosed. The color checker device includes a substrate configured to be inserted into a model eye and to conform to a surface curvature of the model eye when inserted therein. A color test target is located on the substrate. The color test target comprises a plurality of color sections configured for generating a color characterization profile of a fundus imaging camera configured to capture a color image of a human retina. A method of generating a color characterization profile using the color checker device and a fundus imaging system having the color characterization profile stored thereon are also disclosed.

The invention discloses an outdoor dot matrix display screen picture flaw detection method, device and system based on texture features and a server. According to the method, at least two pure color test pictures are obtained, and defect full-coverage detection is realized by utilizing sensitivity differences of different color channels; besides, multi-scale feature extraction is carried out based on a Gabor filter, so that scale features such as single-point dead pixels, regional dark spots and module-level distortion can be captured, and multiple types of flaws such as brightness deviation and large-area uneven brightness can be covered. According to the method, the detection rate of traditional leak detection scenes such as small dead pixels and color deviation is increased to 95% or above, the environment robustness is high, the false detection rate in the complex illumination and vibration environment is low, and a high-reliability automatic defect detection solution is provided for the field of outdoor advertisements and public display.

The utility model relates to a five-color test fixture, which belongs to the technical field of equipment test, and comprises a test fixture body and a plurality of test positions, each test position is provided with an indicator lamp capable of being independently controlled, and the outer side of the test fixture body is provided with a detection heat dissipation mechanism. The top of the test fixture body is fixedly provided with a plurality of test positions. According to the five-color test fixture, whether a circuit of a lamp bead is normal or not can be judged under the action of the metal pins and the indicator lamps, heat can be quickly conducted by using the heat conducting seat and the vapor chamber, and the temperature on the vapor chamber and the heat conducting seat can be reduced under air outlet of the cooling fan, so that the test fixture body is cooled; the service life of the device is prolonged, a limiting pin can be driven to stretch out and draw back under the action of a pull ring, a movable rod, a movable plate and a reset spring, the heat conduction base can be conveniently fixed in an inserted mode or detached through the limiting pin, maintenance and replacement are convenient, and flexibility is improved.

This application relates to apparatus and methods for testing one or more computing devices. In one example, a testing system includes a testing frame with at least one testing cabinet for housing a computing device under test. The testing cabinet can also include testing equipment such as a camera, a microphone, a speaker, a color test sheet, and an ambient light sensor. Further, the testing frame includes a control cabinet for housing a testing computing device, where the testing computing device is communicatively coupled, through one or more hubs, to each computing device under test. The testing frame may also include a bracket that secures a monitor and a keyboard, where the monitor and keyboard are communicatively coupled to the testing computing device. The testing computing device can control the testing equipment to test various functions of the computing device under test, an may generate status based on the tests.

The invention discloses an ink color testing method, device and equipment and a storage medium, and relates to the technical field of ink testing for ink-jet printing. The method comprises the following steps: determining test waiting time; controlling the ink-jet printing equipment to jet ink to be tested onto a printing medium to obtain a first test image; and after the test waiting time, controlling a color acquisition device to obtain a color value of the first test image so as to determine color characteristics of the ink to be tested. According to the method provided by the invention, the color of the first test image is not collected immediately after the first test image is printed, but is collected after the test waiting time ensures that the color of the ink on the printing medium is stable, so that the test result is closer to the actual performance, and the accuracy of the ink color test result is improved.

The present invention discloses a color test paper for aflatoxin detection and a preparation method thereof. 71‑x Y x Nb6B 23 Nanocrystalline / amorphous composite magnetic iron-based nanoparticles are mixed with colloidal gold particles, labeled with corresponding antibodies, and then sprayed on a nitrocellulose membrane. Finally, a polyvinyl chloride base plate, a sample pad, a nitrocellulose membrane, and absorbent paper are assembled to form a color test paper. 71‑x Y x Nb6B 23 The mixed particles of nanocrystalline / amorphous composite magnetic iron-based nanoparticles and colloidal gold have a specific adsorption effect on aflatoxin, forming color blocks under the action of particle agglomeration, thereby realizing the visual detection of aflatoxin.

The invention relates to a packaging unit detecting and positioning method and system based on image analysis, and relates to the technical field of image detection.The method comprises the steps that multiple sets of illumination parameters for testing are determined; acquiring color test images of the plurality of food packages for testing under the plurality of groups of illumination parameters for testing, and determining an optimal illumination parameter; a plurality of color test images of the to-be-punched food packages under the optimal illumination parameters are obtained, and the positions of the to-be-punched food packages in any two color test images are different; determining a punching positioning matching point group of the to-be-punched food package based on the plurality of color test images of the to-be-punched food package under the optimal illumination parameters; acquiring a color real-time image of the food package to be punched under the optimal illumination parameter; and the real-time punching coordinate is determined based on the punching positioning matching point group and the color real-time image of the to-be-punched food package, and the method has the advantage of improving the punching positioning efficiency and accuracy of the food package.

The application belongs to the field of electrochemistry, and relates to tumor protein P53 gene detection, in particular to a label-free double-color test strip, a kit and a preparation method thereof for tumor protein P53 gene detection. The application belongs to a novel LFA method, which combines DNA hybridization chain reaction with the electrostatic adsorption principle of test line / control line, selects common and cost-effective bovine serum albumin as the test line, utilizes the difference in the adsorption capacity of BSA to double-stranded DNA and nano-gold, and the different flow rates of different molecules on the NC membrane to complete the detection of p53 at different concentrations. The test line is constructed by positively charged PDDA to ensure the effectiveness of the LFA. Meanwhile, the detection principle of a liquid colorimetric sensor is combined, and the double-color development greatly reduces the detection limit of the test strip. The sensor is label-free throughout, and has high analytical performance in terms of sensitivity, selectivity and practicability. The p53 gene is detected on the lateral flow test strip for the first time.

The utility model provides a hard contact lens fitting device which is used for checking whether a hard contact lens is matched or not through fluorescein and comprises colored test paper and a holding handle, and the holding handle is connected with the colored test paper; the coloring test paper is cylindrical, and one end, far away from the holding handle, of the coloring test paper extends along the axial direction of the holding handle to form a coloring part with a curved surface; the shape of the holding handle comprises a rod shape, the holding handle is connected with one end of the colored test paper, and a disc-shaped stopping part is formed by extending along the radial direction of the holding handle and is used for stopping fluorescein adsorbed by the colored test paper. The utility model provides a hard contact lens fitting device, which is helpful for improving the uniformity of fluorescein distribution, improving the accuracy of fitting results and reducing the possibility of pollution caused by fluorescein leakage.

This invention relates to user-specific color contrast enhancement. The invention proposes an apparatus and corresponding method for estimating a user's categorical color matching function (CMF) type and / or adjusting the device's color imaging workflow. Estimating the user's categorical CMF type includes: displaying a binary color test set on a screen; calculating a score for each categorical CMF type in a predetermined set of categorical CMF types based on received input information; and selecting a categorical CMF type for the user corresponding to the maximum or minimum score. Furthermore, this invention proposes an apparatus and corresponding method for creating a binary color test set.

The application discloses a printed matter color automatic detection device and detection method, which comprises a chassis, a transmission assembly arranged above the chassis to realize transmission of the printed matter, and a detection cabinet mounted on the top of the chassis, and a color detection mechanism arranged in the detection cabinet to realize multiple detection operations of the color of the printed matter. The application relates to the color automatic detection technical field. The printed matter color automatic detection device and detection method are provided with the color detection mechanism, a switching unit is used to realize switching operations of different light source lamps, color tests under different environments in the detection process are realized, personnel is not needed to replace the light source lamps, the clamping unit is used to realize clamping opening of the light source lamps, and the clamping opening realizes light source generation and stable operations, light source switching and positioning operations, so that the overall detection operation is more convenient, the efficiency is higher, and integrated automatic color detection operations are realized.

An abrasive article including a backing; a plurality of shaped abrasive particles overlying the backing; where the abrasive article further has: 1) a Swarf Mode Gray Value of less than 25 for cumulative material removed of at least 500 g according to the Inconel Grinding Swarf Color Test; 2) a Maximum Swarf Mode Gray Value of less than 25 for a cumulative material removal of not greater than 700 g according to the Inconel Grinding Swarf Color Test; or 3) a combination of 1) and 2).

The invention discloses a color phase detection method of a pigment, which comprises the following steps: preparing a standard rich color test block and a to-be-detected rich color test block as well as a standard light color test block and a to-be-detected light color test block, and making a colorimetric color card; respectively comparing the colors of the standard rich-color test block and the to-be-detected rich-color test block in the colorimetric color card and the colors of the standard light-color test block and the to-be-detected light-color test block in the colorimetric color card by adopting a visual observation mode; respectively detecting the standard rich-color test block, the to-be-detected rich-color test block, the standard light-color test block and the to-be-detected light-color test block by adopting a colorimeter to obtain a chromatic aberration parameter E1 of the to-be-detected rich-color test block relative to the standard rich-color test block and a chromatic aberration parameter E2 of the to-be-detected light-color test block relative to the standard light-color test block; if the visual observation result shows that the colors of the corresponding test pieces are similar, E1 < = 0.8 and E2 < = 0.8 are met simultaneously, the to-be-detected pigment is judged to be qualified. According to the hue detection method, the hue of the pigment can be accurately and rapidly detected, and the stability of the hue of the pigment is ensured.

Patterned fibrous substrates having a plurality of individual fibers, a first region, and a second region are provided. The patterned fibrous substrates have a plurality of individual fibers of the first region having a first diameter and a plurality of individual fibers of the second region have a second diameter, wherein the first diameter is less than the second diameter. The individual fibers of the first region and the individual fibers of the second region are substantially free of bonds, other than primary bonds. The first region has a first C.I.E. L* score, and the second region has a second C.I.E. L* score, according to the Color Test Method. The first C.I.E. L* score is different than the second C.I.E. L* score.

The present application relates to a kind of equipment signal indicator light color test system, comprising: light guide fiber, the probe end of the light guide fiber is aligned with the signal indicator light of the equipment to be detected, and the other end of the light guide fiber is connected to color sensor;Color sensor is used to convert the color light signal transmitted by light guide fiber into spectral digital signal;Microcontroller is used to control the on-off of the signal indicator light of the equipment to be detected, and the spectral digital signal obtained from color sensor is parsed into color coding information;PC end is connected with the microcontroller, used to issue signal indicator light on-off control instruction to the microcontroller, and the color coding information parsed by the microcontroller and the pre-input color information coding are compared and the comparison result is output;Power supply is used to power the system.Compared with the prior art, the present application has the advantages of strong environmental applicability, high test accuracy, simple structure and high economic practicality.

The invention discloses a printed matter color automatic detection device and detection method.The printed matter color automatic detection device comprises a bottom frame, a transmission assembly is arranged above the bottom frame to achieve printed matter transmission, a detection cabinet is installed at the top of the bottom frame, and a color detection mechanism is arranged in the detection cabinet to achieve multiple times of detection operation on the colors of printed matter; the invention relates to the technical field of automatic color detection. According to the printed matter color automatic detection device and detection method, the color detection mechanism is arranged, switching operation of different light source lamps is achieved through the switching unit, so that color testing in different environments is simulated in the detection process, meanwhile, personnel do not need to replace the light source lamps, clamping opening of the light source lamps is achieved through the clamping unit, and the detection efficiency is improved. The light source generation and stabilization operation is achieved through clamping, the light source switching and positioning operation is achieved through clamping opening, the overall detection operation is more convenient and faster, the efficiency is higher, and the integrated automatic color detection operation is carried out.

The invention discloses a color evaluation method for large-scale set book printing. The method comprises the following steps: designing a color test sample; sending the designed color test specimen page to a plurality of test printing factories for printing, and collecting a printing draft of the color test specimen page; performing multi-dimensional evaluation on each collected printing draft according to a pre-constructed color evaluation strategy to obtain a total scoring result of each printing draft; the pre-constructed color evaluation strategy is used for evaluating the color separation color and gray balance uniformity of the character color separation standard test pattern area, evaluating the cover color of the cover simulation area of the book to be printed, and evaluating the spot color tone and the light dot of the color gradient area; evaluating the filling condition of black dots in the fine line in the dot filling detection area in the fine line, and evaluating the fine line registration condition in the fine line registration detection area to obtain a scoring result of a corresponding dimension; and screening the plurality of test printing factories based on the total scoring result of each printing draft to obtain qualified printing factories.

An abrasive article including a backing; a plurality of shaped abrasive particles overlying the backing; where the abrasive article further has: 1) a Swarf Mode Gray Value of less than 25 for cumulative material removed of at least 500 g according to the Inconel Grinding Swarf Color Test; 2) a Maximum Swarf Mode Gray Value of less than 25 for a cumulative material removal of not greater than 700 g according to the Inconel Grinding Swarf Color Test; or 3) a combination of 1) and 2).

The invention discloses a screen color configuration method, electronic equipment and a computer readable storage medium. The screen color configuration method comprises the following steps: acquiring a test result of a user based on various color test data; carrying out weight calculation by utilizing a test result, and determining a color style file of the user; and configuring matched screen display parameters for the user based on the color style file. By means of the method, personalized screen color configuration can be effectively achieved, cross-device color configuration synchronization is achieved, and it is ensured that consistent display effects are obtained at different terminals.