110 results about "Color test" patented technology

A color calibration apparatus includes an image obtaining unit configured to obtain first and second photographed images which are generated by photographing first and second mono-color test images displayed on the display device; a controller configured to detect an ambient light area on which an ambient light is shining within the first photographed image based on pixel values of the first photographed image, and further configured to determine a remaining area of the first photographed image other than the ambient light area as a representative value calculating area; and an image processor configured to calculate a representative value based on pixel values of an area corresponding to the representative value calculating area within the second photographed image, and further configured to perform color calibration of the display device based on the representative value.

The invention provides a method used for brain health cognitive disorder diagnosis and risk evaluation. A client-side and a server need to be provided, and the server is further provided with a database. The method comprises the steps of providing a test interface for a user through a client-side wherein the test interface is used for conducting a brain health test, and the brain health test comprises a visual space test part, a character color test part, a memory and cognitive function test part and a mental disorder test part; after the test interface completes tests of all the parts, using the test interface to transmit test data to the server; using the server to analyze the received test data to obtain a preliminary analysis result and feed the preliminary analysis result back to the server, and storing the test data and the preliminary analysis result into the database for a doctor to refer to and conduct further diagnosis at the same time. The invention further provides a system used for brain health cognitive disorder diagnosis and risk evaluation, the purpose that the user conducts an accurate brain function test at any time and any place is achieved, treatment is conveniently conducted timely, and the test efficiency is drastically improved.

Systems and methods that facilitate automatic convergence and geometry alignment in projection systems such as a PTV. The automatic convergence system (ACS) preferably includes a CCD camera mounted inside the PTV and focused on the entire inside of a projection screen Fresnel lens. Alternatively, the ACS may include a deployable reflective sheet, preferably in the form of a roll up screen. In operation, signals from the CCD camera corresponding to test patterns projected onto the Fresnel lens or reflective sheet are analyzed and used to align, center or steer raster patterns to compensate for convergence error at a particular location. In a convergence mode, the video is blanked and then successive monochrome video test patterns are projected on the screen. The images captured by the CCD camera are used to memorize the location of landing points of one color test pattern from one of the projection units and then to align the other color patterns from the other projection units to the same landing points as the first color pattern. In a geometry alignment mode, the difference in brightness between an image striking the Fresnel screen and the over scanned area of the PTV cabinet is used to determine the border of the screen. This information is then used to provide reference marks for all geometrical adjustments done automatically using a similar process of successive test patterns and analysis.

The invention relates to a direct-type LED backlight color uniformity correction system and a direct-type LED backlight color uniformity correction method. The direct-type LED backlight color uniformity correction system is characterized by comprising an LED backlight source liquid crystal display module (2) and a color testing device (1) optically connected with the LED backlight liquid crystal display module mutually, wherein the LED backlight source liquid crystal display module (2) comprises an LED backlight source unit, an LED backlight source driving control unit for driving the LED backlight source unit and a liquid crystal display screen; and the color testing device (1) tests the color data of the LED backlight source liquid crystal display module (2) through an optical lens and matched testing software and stores the data, and the stored data is analyzed to obtain a correction coefficient. The system and the adopted method have simple implementation and low cost, and are suitable to be used in mass production.

The invention relates to a cotton fiber color testing device. The device is characterized by comprising a sample frame, wherein optical glass is arranged at the bottom of the sample frame, the top ofthe sample frame is open, a sample is arranged in the sample frame, a sponge mat and an upper cover are sequentially arranged above the sample, and the upper cover and the sponge mat slide up and downin the sample frame. According to another technical scheme, the invention provides a cotton fiber color testing method. According to the new cotton fiber color testing analysis method and device, compared with existing cotton fiber color testing equipment, color indexes are improved in the three aspects that the influence of impurities on cotton fiber color testing is removed; a new color index ais added, and representation of fiber colors in a three-dimensional color space is truly realized; and variation coefficients of all color values of Rd, +b and a are added, and representation of non-uniformity of maturity isochromatic characteristics of each batch of cotton is benefited.

The embodiment of the invention discloses an image display quality testing method, testing platform and system and relates to the display field. The image display quality testing method, testing platform and system is wide in application range and high in result accuracy and can reflect actual image display quality of a displayer. The image display quality testing method comprises the steps of importing data, namely importing color data corresponding to 24 color blocks of a Macbeth white color standard card; testing colors, namely inputting the color data corresponding to the 24 color blocks of the Macbeth white color standard card into a sample to be tested, enabling the sample to be tested to display the single-color images corresponding to the 24 color blocks of the Macbeth white color standard card one by one, and meanwhile utilizing a color analyzer to conduct color testing on the images displayed by the sample to be tested; processing test results, namely comparing the color test results with a pre-stored standard color parameter value one by one and generating an appraisal document according to comparison results.

The exemplary embodiment disclosed herein comprises several aspects of defining and using optimal color test patches for calibrating a printing system for various purposes (e.g., multi-media, gamut extension, drifting correction, etc.). One aspect is the creation and use of color patches where the color patches are selected optimally to result in minimum mean square error when those color patches are used to determine weights of a limited number of basis vectors that model the system (e.g., model the print engine response). A joint optimization technique is given as a method to select the optimal color test patches for calibration.

The invention discloses a double-light-source color photometer with SCI/SCE test conditions compatible and an implementation method. Switch of the SCI/SCE test conditions is achieved in the mode of double-light-source active illumination, the design of the optical trap is replaced, and corresponding calibration algorithms are designed for the two test conditions. As is shown in the experimental result, the test results of the double-light-source color photometer on the SCI/SCE test conditions are obviously better than that of the prior art, and the double-light-source color photometer with the SCI/SCE test conditions compatible is more suitable for color test instruments with SCI/SCE test conditions compatible and has prominent value.

Embodiments of the present invention disclose a method and a device of testing color blindness, which belong to the technical field of test. The method includes: acquiring a plurality of preset coloring schemes, each of which is provided to test one type of color blindness and comprises a base color and a changing color; acquiring color sense test patterns, each of which corresponding to one of the coloring schemes; changing a color of at least a part of the grids in one of color sense test patterns one by one from the base color to the changing color according to the grid color-changing sequence of the corresponding color sense test pattern during displaying the corresponding color sense test pattern, when the corresponding color sense test pattern is used to perform color blindness test on a tested person, and acquiring positions of the eyeballs of the tested person as the color of the grids is changing; obtaining a first fitting degree by fitting an acquired movement trace of the color point to a movement trace of the eyeballs; and, judging which type of color blindness of the tested person is according to the first fitting degree. According to the present invention, dependence analysis is performed on the movement trace of the eyeballs of the tested person and the movement trace of a color point in the corresponding color sense test pattern to obtain in quantitative sense which type of the color blindness of the tested person is, thereby increasing accuracy of the color blindness testing.

The invention discloses an analytical method for measuring content of soluble lead in domestic ceramic. The analytical method comprises the following steps: cleaning a domestic ceramic sample to be measured, naturally airing, dipping a cotton swab in a special kit into a cleaning agent to scrub the surface of the domestic ceramic sample back and forth for 30 s, putting the cotton swab onto a color test paper board, dripping a drop of a color developing agent onto the color test paper board, standing for 2 min, contrasting the color test paper board and a standard operation color level contrast card under the condition of bright light, and determining result range of soluble lead content in the sample by a visual colorimetric method. In comparison with the prior art, the invention has the following advantages: detection limit of lead is 20 ng; the whole analytical testing process lasts for 5-10 min; analytical time is greatly shortened; and work efficiency is raised. Fitting curve regression coefficient of lead dissolving-out amount-scrubbing amount is greater than 0.99, which shows that it is feasible to speculate dissolving-out amount by measuring the scrubbing amount. The method of the invention is simple, fast and easy to operate, and can meet requirements of fast analysis of soluble lead content of domestic ceramic.

A method for analyzing a dipstick using a smartphone is provided herein. The method includes: capturing an image containing: a dipstick having colored test reagents, and a color board having a grid of grey patches and a plurality of reference color patches; deriving, based on the grid, local illumination parameters associated with the colored test reagents and the plurality of reference color patches; determining whether illumination parameters are sufficient for interpreting the colored test reagent; in a case the illumination parameters are insufficient, notifying a user that an interpretation of the colored test reagents is not possible, otherwise, applying one or more image enhancement operation to the captured image, based on an analysis of the grid of grey patches, to yield enhanced reference color patches; and interpreting the one or more colored test reagents, by projecting the colored test reagents onto a vector of the enhanced reference color patches.

The present invention relates to an image correction system and correction method of a display device. A reference color data and a test color data are generated by a generating unit and sent to a reference display and a test display respectively to display a reference color and a test color. To test the color, the measurement unit measures the reference color and the test color respectively to generate a reference value and a test value, the adjustment unit adjusts the test color data according to the reference value and the test value, and the operation processing unit receives the reference color data and the adjusted color Test the color data, and calculate the reference color data and the adjusted test color data to generate a compensation function to calibrate the test display.

A system and method for creating a remote custom rendering profile and automatically delivering and installing the resulting remote custom profile into a digital front end (DFE) in order to perform color management for a rendering device. A color test rendering job comprising color swatches with a number of additional information can be forwarded to a remote service provider and the test job can be scanned and the custom rendering profile can be generated utilizing a profiler application. The resultant rendering profile can then be electronically transferred back to the rendering device based on the additional information and can be installed without user intervention.