Abstract: A gamut mapping method and system for implementing out-of-gamut spot color reproduction, including a memory for electronically storing information related to at least one color gamut and a gamut mapping editor including a processor communicating with the memory, the processor of the gamut mapping editor (i) causing a user to be apprised that a target spot color is outside the at least one color gamut and (ii) facilitating the user's employment of one or more of a plurality of gamut mapping methodologies to select a preferred color from a plurality of mapped colors when the target spot color is outside the at least one color gamut.

Abstract: Color separation systems and methods improve color constancy and smoothness of a color lookup table (LUT) for a printer. A plurality of nodes of the LUT may be defined in colorimetric space, and the nodes out of the printer gamut may be mapped to the printer gamut surface. All possible colorant combinations are then determined that produce each node in the LUT in a device independent color space based on an inversion of the spectral based printer model. Next, a specific image quality metric combination based on a color inconstancy index (CII) and a gray component replacement (CGR) strategy is defined. And a colorant combination is determined for each and every node in the LUT based on this metric. A smoothing filter may be used to smooth the lookup table.

Abstract: A spot color rendering system and method that incorporates spot color press emulation color transformation to preserve spot color on a target rendering device. A spot color rendering option implemented in a graphical user interface can be selected in order to render the spot color via an intermediate emulation space. The spot color name calls can be first associated with a color value in an ICC profile connection space (PCS), as CIE L*a*b* or XYZ. A database relation of the spot color name with its associated PCS numerical value enables association of the name with the resultant color transformed output. Thereafter, a color transformation with respect to the spot color value can be performed in order to compute a color on an emulation press and then the color can be preserved to the target rendering device. Such an approach enables a color consistent rendering to the target rendering device similar to that of the emulation press.

Abstract: A computer-implemented method for imaging of spot colors within a document using a spot color editor is provided. The method includes determining a spot color formula, using a spot color editor, for providing a colorimetric match to a desired spot color in a print job, wherein the spot color is within a color space and the spot color formula includes colorant values for each color in the color space; printing a test image of the spot color with the determined spot color formula for analysis, wherein the color composition of the spot color test image is analyzed by a user to determine whether desired image quality is achieved; and determining an updated spot color formula for providing a colorimetric match to the desired spot color in the print job based on a received input, if the desired image quality is not achieved.

Abstract: Color separation systems and methods improve color constancy and smoothness of a color lookup table (LUT) for a printer. A plurality of nodes of the LUT may be defined in colorimetric space, and the nodes out of the printer gamut may be mapped to the printer gamut surface. A set of possible colorant combinations are then determined that produce each node in the LUT in a device independent color space using a non-linear minimization algorithm, such as, for example, a conjugate gradient algorithm. Next, a colorant combination may be determined for each and every node in the LUT based on an image quality metric. In some implementations, a smoothing filter may be used to smooth the lookup table.

Abstract: A gamut mapping method and system for implementing out-of-gamut spot color reproduction, including a memory for electronically storing information related to at least one color gamut and a gamut mapping editor including a processor communicating with the memory, the processor of the gamut mapping editor (i) causing a user to be apprised that a target spot color is outside the at least one color gamut and (ii) facilitating the user's employment of one or more of a plurality of gamut mapping methodologies to select a preferred color from a plurality of mapped colors when the target spot color is outside the at least one color gamut.

Abstract: Color separation systems and methods improve color constancy and smoothness of a color lookup table (LUT) for a printer. A plurality of nodes of the LUT may be defined in colorimetric space, and the nodes out of the printer gamut may be mapped to the printer gamut surface. A set of possible colorant combinations are then determined that produce each node in the LUT in a device independent color space using a non-linear minimization algorithm, such as, for example, a conjugate gradient algorithm. Next, a colorant combination may be determined for each and every node in the LUT based on an image quality metric. In some implementations, a smoothing filter may be used to smooth the lookup table.

Abstract: A spot color rendering system and method that incorporates spot color press emulation color transformation to preserve spot color on a target rendering device. A spot color rendering option implemented in a graphical user interface can be selected in order to render the spot color via an intermediate emulation space. The spot color name calls can be first associated with a color value in an ICC profile connection space (PCS), as CIE L*a*b* or XYZ. A database relation of the spot color name with its associated PCS numerical value enables association of the name with the resultant color transformed output. Thereafter, a color transformation with respect to the spot color value can be performed in order to compute a color on an emulation press and then the color can be preserved to the target rendering device. Such an approach enables a color consistent rendering to the target rendering device similar to that of the emulation press.

Abstract: Color separation systems and methods improve color constancy and smoothness of a color lookup table (LUT) for a printer. A plurality of nodes of the LUT may be defined in calorimetric space, and the nodes out of the printer gamut may be mapped to the printer gamut surface. All possible colorant combinations are then determined that produce each node in the LUT in a device independent color space based on an inversion of the spectral based printer model. Next, a specific image quality metric combination based on a color inconstancy index (CII) and a gray component replacement (CGR) strategy is defined. And a colorant combination is determined for each and every node in the LUT based on this metric. A smoothing filter may be used to smooth the lookup table.

Abstract: Mapping an input color space into a colorimetric subspace can generate a target colorimetry space. Initial device color values can be used to generate an initial reference colorimetry space. A penalty error between the target colorimetry space and the reference colorimetry space can be minimized by generating a next reference colorimetry space based on subsequent device colors.

Abstract: Mapping an input color space into a colorimetric subspace can generate a target colorimetry space. Initial device color values can be used to generate an initial reference colorimetry space. A penalty error between the target colorimetry space and the reference colorimetry space can be minimized by generating a next reference colorimetry space based on subsequent device colors.

Abstract: The present utility model belongs to domestic appliances, especially to devices for fixing the magnetic coil of drive unit in tape recorders, video players or cameras. Two coil bobbin brackets (2) having at least one bobbin hook (2-1) on each of them are mounted on the chassis (50) in their corresponding locking slots. A magnetic coil (3) is mounted between the two coil bobbin brackets (2). A planger (1) is mounted adjacent to one end of the magnetic coil (3), and close to the other end, a magnet (6) is mounted. Moreover at least one coil positioning pin (4) is mounted on that bobbin bracket (2), close to which the magnet 6 is mounted on the magnet bracket (5). The present utility model is simple in structure, costs low, and has a high productivity. The pushing force for the planger (1) is increased, and the utility of the products is improved.

Abstract: The present utility model belongs to domestic appliances, especially to devices for fixing the magnetic coil of drive unit in tape recorders, video players or cameras. Two coil bobbin brackets (2) having at least one bobbin hook (2-1) on each of them are mounted on the chassis (50) in their corresponding locking slots. A magnetic coil (3) is mounted between the two coil bobbin brackets (2). A planger (1) is mounted adjacent to one end of the magnetic coil (3), and close to the other end, a magnet (6) is mounted. Moreover at least one coil positioning pin (4) is mounted on that bobbin bracket (2), close to which the magnet 6 is mounted on the magnet bracket (5). The present utility model is simple in structure, costs low, and has a high productivity. The pushing force for the planger (1) is increased, and the utility of the products is improved.

Abstract: This utility model belongs to domestic appliances, especially to grounding devices of metal in the drive unit of tape recorders, video players or cameras. This utility model includes chassis, main base, and magnetic head, wherein, a positioning point 3-1 for the magnetic head board is located on the chassis 50; the positioning point 3-1 is connected to the spring 60 through the main base 3; the spring 60 is connected to the magnetic head board 2. The magnetic head 1 is connected to the magnetic head board 2 by screw 4. The metal in the drive unit of this utility model uses a simple grounding device. Therefore, not only the ground effect is improved, but also the grounding spring is saved, and the cost and distortion factor of sound are reduced, and the efficiency is increased.

Abstract: The present utility model belongs to domestic appliances, especially to devices for fixing the main metal in the drive unit of tape recorders, video players or cameras. A main base 2 with a main base bore is fixed on a chassis 50 with a chassis bore by screw 4. A step-shaped metal 3 is inserted inside a bore formed by the main base bore and the chassis bore, and on the metal positioning plane 3-1. A shaft 5 is planted inside the step-shaped metal 3. A washer 1 is installed at one end of the shaft 5. The metal, the chassis and the main base are positioned against each other vertically and horizontally. In such pattern, any ill effect of the declination of the metal has been prevented, in consideration of the case that tape recorder, video player, or camera falls onto the ground, so that the normal operation of the appliances is ensured.

Abstract: The present utility model belongs to domestic appliances, especially to ejecting arm devices for opening and closing the cassette door of tape recorders, video players or cameras. A pushing rod 2-1 is provided at at least one edge of the magnetic head board 2; an ejecting arm 1 is mounted on the chassis 50 between the magnetic head board 2 and at least one edge of the cassette-entering opening. The shape of the ejecting arm 1 is like . The pushing rod 2-1 is embedded in the groove 1-1 at one end of the ejecting arm 1, and at the other end is a locking head 1-2 away from the edge of the cassette-entering opening. This device can lock the cassette door, so that the cassette door can't be loosened during the operation of the drive unit in tape recorders, video players or cameras, and avoid making noise and causing tape being eaten.