Abstract: A tele-printing system includes a plurality of printers each for performing printing on a medium based on common electronic printing data at a printing request from a request source; a plurality of color conversion tables, created one for each of the plural printers, each containing printing characteristic information unique to the respective printer; and a management unit for sending said printing data to said plural printers and managing the printing of said printing data on each said printer, in accordance with said unique printing characteristic information. The tele-printing system realizes large item small volume printing at a low cost. It is possible to shorten time required for delivering print mediums to request source and delivery destination from the respective printers. A print specification of each print medium can be modified at a reasonable cost, and the results of printing on plural printer obtain an identical quality in color.

Abstract: A method is provided for creating a binary-coding pattern to be used in binary-coding a multi-value image. The method includes the steps of: creating a basic pattern shape of the prospective binary-coding pattern by a first arithmetic operation; determining the sequence of lighting pixels composing such basic pattern by a second arithmetic operation; and creating a rectangular pattern, which serves as the prospective binary-coding pattern, based on the resultant basic pattern. Hereby, it is possible to automatically create a centralized type of binary-coding pattern, and also it is possible to facilitate creating a minimum-sized binary-coding pattern.

Abstract: A halftoning apparatus free of the occurrence of moiré and other artifacts under a simple technique. In the apparatus, the estimating section calculates the pixel value of the noteworthy pixel, which is to be converted into a binary value, based on other pixel values than that of the noteworthy pixel, and the binarizing section converts the multilevel value of the noteworthy pixel into a binary value.

Abstract: A display apparatus includes a display section having plural display elements for displaying a display object with N (natural number larger than one) display elements per pixel, and a display control section, communicably connected to the display section, for controlling the displaying state of the display section in terms of color factors of the respective display elements in such a manner that the display object is displayed with each of the display elements corresponding to one or more pixels on the display object. It is possible to display a small letter, serving high visibility.

Abstract: Present invention relates to a color image processing apparatus including an input color chip making unit for making a color chip of the selected color signal as an input color chip, an output color chip making unit for subjecting the selected color signal to the under color removal processing carried out in an UCR processing unit with two or more parameters different from one another, thereby making a color chip of the obtained color signal as an output color chip for each parameter, and a parameter determining unit for selecting among the parameters a parameter which provides the minimum difference between the input color chip and the output color chip, wherein the UCR processing unit subjects the input color signal to the UCR processing by using the parameter selected by the parameter determining unit. With this, a color image desired by a user can be created.

Abstract: An illuminance spectrum I of reflected light from a color print of an N-order color having an arbitrary dot percent d.sub.1-N is defined by a diffuse reflection coefficient Sb(d.sub.1-N,.lambda.) and a specular reflection coefficient Ss(d.sub.1-N,.lambda.). These reflection coefficients are obtained in the following manner. A plurality of reference colors are specified on each of N.times.2.sup.(N-1) sides that constitute an N-dimensional color space including the N-order target color. Each reflection coefficient is expressed by a linear combination of a plurality of reference reflection coefficients Sb and Ss, which are set in advance for the plurality of reference colors. The illuminance spectrum of reflected light is then determined according to these reflection coefficients Sb and Ss. Color data representing the colors of the print in a colorimetric system suitable for an output device are subsequently generated from the illuminance spectrum.

Abstract: An N-dimensional correction space is constructed with weighting coefficients .xi. and .eta. that are used for determining reflection coefficients for an N-order target color, where the weighting coefficients .xi. and .eta. specify the lengths of the sides constituting the N-dimensional correction space, and where 2.sup.N reference colors are located at the corners of the N-dimensional correction space. The N-dimensional correction space is divided by N pieces of (N-1)-dimensional spaces that run through the target color, into 2.sup.N partial N-order correction spaces. The reflection coefficient for the target color is determined by multiplying a reference reflection coefficient with respect to each of the 2.sup.N reference colors by the volume of a partial N-dimensional correction space that is located at a diagonal position against a coordinate point of each reference color and summing up the results of multiplication for the 2.sup.N reference colors.

Abstract: An illuminance spectrum I of reflected light from a color print of an arbitrary dot percent d is defined by a diffuse reflection coefficient Sb(d,.lambda.) and a specular reflection coefficient Ss(d,.lambda.). The diffuse reflection coefficient Sb(d,.lambda.) is determined by linear interpolation of a plurality of reference reflection coefficients Sb(d.sub.i,.lambda.) for a plurality of reference dot percents d.sub.i. The specular reflection coefficient Ss(d,.lambda.) is also determined by linear interpolation of a plurality of reference reflection coefficients Ss(d.sub.j,.lambda.) for a plurality of reference dot percents d.sub.j. The illuminance spectrum of reflected light is then determined according to these reflection coefficients Sb(d,.lambda.) and Ss(d,.lambda.). Color data representing the colors of the print in a calorimetric system suitable for an output device are subsequently generated from the illuminance spectrum.

Abstract: There is provided a model where the illuminance of reflected light from the print is expressed with a linear combination of the illuminance of specular reflection light and that of internal reflection light. On the basis of the model, three methods are applicable to compute the colors of a print disposed in the three-dimensional space. In the first method, a specular reflection coefficient and an internal reflection coefficient, which are depending upon the wavelength, are interpolated by an angle of reflection .theta. and an angle of deviation .rho., and the illuminance spectrum of the reflected light is subsequently determined (step S2). Tristimulus values X, Y, and Z are then determined by integration of the illuminance spectrum according to the color matching functions (step S3). In the second method, the tristimulus values are determined for the specular reflection light, the internal reflection light, and the environmental light, respectively, and then interpolated by the reflection angle .theta.

Abstract: The present invention provides an improved technique for extracting contours in an image without waiting for processing of all the scanning lines in the image. Run-data on two boundary scanning lines, each representing the boundary coordinates at which the image changes, are stored in a run-data buffer. A contour extraction unit compares two sets of the run-data with one another to extract segment vectors and detect a set of closed-loop vectors defining a contour of a image area. Three registers in a working buffer store specific data representing the relationship between a starting point and a terminal point of each vector sequence and are used in detecting closed-loop vectors. A vector data memory stores vector data including coordinate values of start and end points of closed-loop vectors.

Abstract: The present invention produces halftone dots which shows smaller fluctuations in size and shape irrespective of variation of the positional relation between the address of screen pattern data and the recording pixels. Displacement F1 through F4 are computed at vertices of a halftone dot region VP1 through VP4. Each of the vertices is shifted to a lattice point of the scanning coordinate systems, and the X-Y coordinates of each lattice point in the scanning coordinate systems are corrected accordingly. The displacement of an arbitrary lattice point A is interpolated from the displacement F1 through F4 on the basis of the distance between each vertex and the lattice point A. As a result, the positional relation between the address of the screen pattern and the position of the recording pixels is maintained constant in the vicinity of the vertices, and this reduces the fluctuations in size and shape of the halftone dots.