Abstract:
A method in a data processing system, a data processing system, and a computer program in computer useable medium generating a numeric specification for one or more target colors that are useful for selecting colors in which a target lightness (Ltarg), a target hue (Htarg) and a target saturation (Ctarg) are determined based upon user inputs.
Abstract:
A method for obtaining a target color measurement using an electronic image capturing device comprising the steps of: (1) determining one or more of a field correction array, level correction vectors, a color correction matrix, and a calibration correction and; (2) adjusting a target color measurement based upon one or more of a field correction array, level correction vector, a color correction matrix, and a calibration correction to obtain a corrected color target measurement.
Abstract:
A method for providing an intensity or brightness measurement using a digital image-capturing device comprising: selecting a target area within a field of view of the image-capturing device, the target area containing pixels; determining the brightness of pixels in the target area; accumulating the brightness values of the pixels in the target area. A device for making color measurements comprising an image-capture device, a processor or logic device, and a memory location for accumulating color data, and the processor or logic device, and a memory location for accumulating color data, and the processor or logic device is programmed to perform color measurements by accumulating the data for pixels located in the target area in memory, and determining a representative color value.
Abstract:
A method for measuring a color value such as brightness or intensity of a sample which comprises: measuring color values for a plurality of color standards using a reference color measurement device to obtain a matrix Y that contains the measurements of the color standards as measured by the reference color measurement device; measuring the same plurality of color standards with a field color measurement device to obtain a matrix X that contains the measurements of the color standards as measured by the field color measurement device; calculating a color correction matrix B based upon the equation Y=BX, measuring the color value for the sample with the field color measurement device, and applying the color correction matrix B to the reading of the sample color to obtain a sample color value that approximates that sample color value that would be obtained using the reference measurement device.
Abstract:
A color measurement device comprising a means (12) for electronically recording a digital color image, a target holder (14) extending from the recording means having a distal end (24), and a target (16) at the distal end of the holder, the target having one or more reference color regions thereon.
Abstract:
An apparatus for automatically collecting a plurality of color readings from a corresponding plurality of color patches (16) applied to a sheet (14), and for transmitting the plurality of color readings to a host computer includes: a color sensor (20) mounted on a carriage motorized for reciprocation along a predetermined carriage path; a feed (17) for feeding the sheet along a predefined feed path, where an exposed portion of the feed path runs in a direction substantially perpendicular to at least a sensing portion of the carriage path, and where the exposed portion of the feed path is substantially adjacent to the sensing portion of the carriage path to allow the color sensor to sense colors applied to the sheet fed to the exposed portion of the feed path, along the entire sensing portion of the carriage path; a carriage control (56) for controlling the position of the color sensor along the sensing portion of the carriage path; a feed control (58) for controlling the position of the sheet along the feed path; and interface (60, 62) for providing a data link (63) to a host computer; and a microcontroller (66) operatively coupled to the carriage control, the feed control, the color sensor and the interface, and including circuitry and/or programming adapted to operate the carriage control and feed control so that the color sensor is separately exposed to each of the color patches applied to the sheet, and for each separate exposure of the color sensor to one of the color patches, is further adapted to activate the color sensor, obtain a color reading from the color sensor, and transmit data corresponding to the color reading over the data link via the interface.
Abstract:
A method for providing an intensity or brightness measurement using a digital image-capturing device comprising: selecting a target area within a field of view of the image-capturing device, the target area containing pixels; measuring the intensity or brightness of pixels in a target area; accumulating the intensity or brightness values of the pixels in the target area; and determining a pixel value representative of the intensity or brightness of the pixels in the target area. A device for making color measurements comprising an image-capture device, a processor or logic device, and a memory location for accumulating color data, and the processor or logic device is programmed to perform color measurements by accumulating the data for pixels located in the target area in memory, and determining a representative color value.
Abstract:
A method for isolating an element of an image made up of pixels comprising the steps of classifying the pixels into different groups based on the color value of the pixel, blurring the image (BOX C), locating a pixel in the blurred image (BOX D), that has a predetermined color value corresponding to the element to be isolated, and growing a mask (BOX E), from the located pixel.
Abstract:
A sensor (10) for measuring reflective, transmissive, or self-luminous samples, comprises a plurality of light sources (18), where each of the light sources emit light of a substantially different wavelength band spaced in the visible spectrum; a reference channel photodetector (20); a sample channel photodectector (22); an optical cap (26) adapted to direct a first portion of the light emitted by each of the light sources to the reference channel photodetector (20); a reflector cone for directing a second portion of the light emitted by each of the light sources to the sample; and a receptor piece (36) for directing the diffuse portion of the light reflected from the sample to the sample channel photodetector (22). The sensor (10) is preferably incorporated into a hand-held "mouse" device, which includes an area on its top surface for seating an index finger of the human hand.
Abstract:
A method for providing an intensity or brightness measurement using a digital image-capturing device comprising: selecting a target area within a field of view of the image-capturing device, the target area containing pixels; determining the brightness of pixels in the target area; accumulating the brightness values of the pixels in the target area. A device for making color measurements comprising an image-capture device, a processor or logic device, and a memory location for accumulating color data, and the processor or logic device, and a memory location for accumulating color data, and the processor or logic device is programmed to perform color measurements by accumulating the data for pixels located in the target area in memory, and determining a representative color value.