110 results about "Color test" patented technology

A hybrid compression scheme in which one or more compression schemes are applied to a scanned document depending on its content. Based on the scanned document data itself and edge-map version thereof, a color test is performed to determine if the document is text or a drawing. If only a few colors are detected, the entire document is compressed by a photo compression technique at full resolution. If more than a few colors are present, the document is most likely a mixed mode document, in which case the entire document undergoes segmentation, a process in which text and drawing regions are separated from the background. The mask of the text and / or drawing regions are coded by a bi-level compression technique, whereas background is down-sampled, if necessary, and then compressed by a photo compression technique. A wrapper module is used to wrap the compressed stream(s) into a single file for easy browsing or transmitting.

The invention discloses a method for identifying test paper, which comprises the steps of acquiring a color test paper image in a 24-bit bitmap format; compressing the color test paper image in the 24-bit bitmap format into a color test paper image in an 8-bit bitmap format; carrying out binarization processing on the color test paper image in the 8-bit bitmap format; acquiring a monochrome test paper image; introducing a test paper template; matching the monochrome test paper image with the test paper template; and extracting test paper information included in the monochrome test paper image. The invention further discloses a device for identifying the test paper, which comprises an image acquisition module, an image processing module, a template introducing module, an image matching module and an image information extracting module. The method and the device provided by the invention for identifying the test paper can identify the test paper accurately and effectively and obtain an accurate score of the test paper.

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 discloses a color management method for the digital printing which comprises, printing IT8 color test table using the digital output equipment and printing equipment, performing measurement using color measuring spectrometer respectively, obtaining the ICC profile of the printing equipment and the ICC profile of the digital output equipment for color adjustment, acquiring the revised ICC profile, proceeding second revision, obtaining the digital sample manuscript of the digital output equipment.

The invention provides a method for preparing a material with a multi-color oxide film on the surface. The method sequentially comprises the steps of washing, drying and coloring for a base material provided with an anodic oxide film on the surface, wherein the method for coloring adopts printing by a printer. The invention also provides equipment for preparing the material with the multi-color oxide film on the surface. Compared with the prior method needing to etch after a plurality of times of anodic oxidation to obtain the multi-color effect, the method can simply obtain the needed multi-color effect by directly coloring by printing with the printer on a one-time anodic oxide film; moreover, the material with the multi-color oxide film on the surface prepared by the method has better effects on gloss, abrasion resistance, corrosion resistance, surface roughness, color test and appearance than that of the material with the multi-color oxide film on the surface prepared by the priormethod; and in addition, the method of the invention avoids to perform alkaline etching, ink shielding and ink baking, and is friendly to the environment.

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.

An image forming apparatus includes a toner image forming device for forming a color image. The toner image forming device forms a first color test image and a second color test image superposedly on an image conveying member so that at least one of a screen angle and a screen ruling with respect to the first color test image is different from that with respect to the second color test image. The image forming apparatus further includes a detecting device for detecting a distribution of heights of the first and second color test images formed superposedly on the image conveying member by the toner image forming device, and a control device for controlling a toner image forming condition of the toner image forming device on the basis of the distribution detected by the detecting device.

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.

An image forming system includes a storing unit that stores a color test pattern made up of a set of test images for grayscale characteristic measurement; a print position setting unit that sets plural positions where the color test pattern stored in the storing unit is printed, based on paper size information supplied thereto; an outputting unit that outputs the color test pattern retrieved from the storing unit in plural positions on a printing medium according to the print positions set by the print position setting unit; a grayscale correction data creating unit that creates grayscale correction data according to results of calorimetric measurements of the test images of plural color test patterns printed on the printing medium; and a grayscale characteristic correction unit that corrects grayscale characteristics of print data to be printed, according to the grayscale correction data created by the grayscale correction data creating unit.

The invention provides a visual angle test method for three-dimensional image display, comprising the following steps of: aiming the central axis of a light colorimeter lens at the normal direction at the center of a screen to be tested, outputting a white / black field signal to a left eye passageway and a right eye passageway of the screen to be tested by a signal source, and respectively arranging a left spectacle lens and a right spectacle lens in the front of the light colorimeter lens, so that an horizontal inclined angle and an vertical inclined angle can be formed between the plane of the screen to be tested and the axial direction of the light colorimeter, and the luminance and crosstalk visual angles along with the left direction, right direction, upper direction and lower direction of the screen to be tested under the left spectacle lens and the right spectacle lens can be measured. Therefore, the minimum in the luminance visual angle and the crosstalk visual angle of the left spectacle lens and the right spectacle lens along with the left direction, the right direction, the upper direction and the lower direction is taken as the visual angle along with the direction: phiL, phiR, phiU, and phiD, so that the horizontal visual angle of the screen to be tested is phiHOR=phiL+phiR, and the vertical visual angle phiVER=phiU+phiD. According to the test method provided by the invention, the crosstalk characteristic of three-dimensional display equipment is considered, and a typical single-color test signal is used, so that the test efficiency can be improved, and the statistic analysis of a test data result can be conveniently carried out.

The invention discloses a device for testing colors of a colored CCD chip. The device mainly solves the problem that an existing testing device can not accurately judge color quality of the colored CCD chip. The device comprises a xenon lamp light source, a monochrometer, an attenuator, an integrating sphere, a dark room, a Dewar bottle temperature control chamber, a drive control circuit and an upper computer. A colored CCD chip to be tested is placed in the Dewar bottle temperature control chamber and is connected with the drive control circuit. The monochrometer generates monochrome light and three-primary color light through irradiation of the xenon lamp light source and parameter adjustment, after the monochrome light and three-primary color light are converted to uniform face array light through the integrating sphere and the dark room, the light irradiates the colored CCD chip to be tested, and rgb brightness values of an image are obtained through the drive control circuit and the upper computer. The image is transferred to an L*a*b* space from an rgb space, and color quality of the colored CCD chip to be tested is judged according to the magnitude of the Euclidean distance between a point to be tested and a standard point in the L*a*b* space. The device has the advantages of being high in adaptability and stability, accurate in measurement of color brightness values, and capable of being used for quality selection of colored CCD chips.

Systems and methods for testing visible chemical reactions of a reagent are provided. In one implementation, the method may include receiving from an image sensor associated with a mobile communications device an image of a reagent with a plurality of colored test reagent pads in proximity to a colorized surface having a plurality of colored reference elements of differing shades. The method further includes using the differing shades of the plurality of colored reference elements to determine local illumination conditions. Thereafter, the method includes using the determined local illumination conditions and an analysis of a depiction of the plurality of colored test reagent pads in the image to determine an extent of a chemical reaction on the reagent. Then the method includes causing the mobile communications device to provide to the user an indication that the testing of the reagent is complete.

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 relates to a measuring bar for rapidly measuring content of nitrite in vegetables and method for making the same. To be exact, the invention relates to employing color changes of rapid measuring bar to indicate effect nitrite content for chemical indicator. The measuring bar comprises base plate and color test paper, wherein the color test paper is made by immersing filter paper into 0.1-3.5% sulfa agent, taking water and alcohol as solvent, taking citric acid and sodium citrate as assistant; drying in 28-72 degree, dipping in 0.8-3.0úÑ naph ethylenediamine alcohol and drying in 28-72 degree. The inventive test paper has the advantages of being high sensitivity and high testing accuracy.

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 ageing test device for a liquid crystal display of a mobile phone. The device comprises a placing bottom plate, wherein the top end of the placing bottom plate is mounted with a test cover mounting plate through a mounting bracket, a test cover is disposed at the top end of the test cover mounting plate, a vibration test stand and a color test stand are disposed on the inner side of the test cover, both sides of the color test stand are slidably connected with a sliding seat through a sliding slot, one side of the sliding seat is fixedly mounted with a test frame, the inner side of the test frame is rotatably connected with a rotating wheel by a rotating shaft, one side of the rotating wheel is rotatably connected with a motor by the rotating shaft, and the outerside of the rotating wheel is sleeved with a transmission belt. The invention provides a transmission belt, a screen mounting bracket and a detecting probe, thereby avoiding the problem that, when the ageing test device for the liquid crystal display is used, it is difficult for the ageing test device for the liquid crystal display to repeatedly detect the color information at each position of the screen, and the screen light is being irradiated to the tester, which affects the use effect of the ageing test device for the liquid crystal display.

This invention relates to a photoelectric integral color test system including a light source and a NN processor characterizing that the light of the source is reflected by a diffusing reflection board to generate an uniform illumination field on the chip channel, the beam of which is emitted to the reflection mirror then enters into a charge coupling detector, a data collecting card and the NN processor. A test method for digitalized photoelectric grease integration color test system includes the following steps: 1, setting up a Lovibond color comparison chip database, 2, setting up a grease sample database, 3, a NN test stage and 4, test stage, which can search for the Lovibond expression of grease in the database to realize the automatic evaluation of the sample.

What is disclosed is a novel system and method to reduce noise induced by color mixing in a color management system. At least one device color recipe is obtained for a target spot color. The recipe is defined for a color marking device and defines a range of marking device color values for a target L*a*b color value. Next, a minimal value and a maximum value of each color value in the range of color values for said target L*a*b color value are identified. An iterative process of searching is performed until the printed color test patch produces a visually acceptable smoothness while matching color accuracy. This iterative process includes generating at least one additional new device color recipe from color values within the range of color values. At least one of the new device color recipes is selected and provided to the color marking device for rendering.

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.