摘要:
An m×n pixel cell may be obtained from an input image, each of the pixels having a respective color value. A characterization of the cell may be determined, including determining a lowest color value and a highest color value of the pixels cell. A difference between the highest color value and the lowest color value may be calculated. If the difference is less than or equal to a threshold difference, an output color value inclusively between the highest color value and the lowest color value may be selected, and a first representation of the output color value may be written to an output medium. If the difference is greater than the threshold difference, multiple output color values may be selected, and a second representation of the multiple output color values may be written to the output medium.
摘要:
An m×n pixel cell may be obtained from an input image, each of the pixels having a respective color value. A characterization of the cell may be determined, including determining a lowest color value and a highest color value of the pixels cell. A difference between the highest color value and the lowest color value may be calculated. If the difference is less than or equal to a threshold difference, an output color value inclusively between the highest color value and the lowest color value may be selected, and a first representation of the output color value may be written to an output medium. If the difference is greater than the threshold difference, multiple output color values may be selected, and a second representation of the multiple output color values may be written to the output medium.
摘要:
A mask generation subroutine forms Z number of stacked n by m blank mask matrix arrays to provide a plurality of columnar mask locations. The subroutine then selects randomly any previously unselected column of mask locations from the stack of blank mask matrix arrays and assigns best print mode parameters to the individual mask locations in the selected column. The process of selecting and assigning is repeated until all columns of mask locations have been selected and all mask locations have been assigned best print mode parameters to provide a complete set of Z number of configured mask matrix arrays. A control program selects desired ones of the Z number of masks and applies the selected mask to control indicia patterns so that the depositing of indicia forming material in adjacent pixel locations is spaced in time to occur in different ones of the Z passes.
摘要:
Pixel-based image data are subsampled for transmission to a printer and later bilinear interpolation in the printer. The transmission system evaluates the error that will remain after interpolation. In response to this evaluation, the transmission system also forms trim data for later application to the interpolated subsample to remove a significant part of the error. Preferably trim data points are selected based on relative importance of the associated correction--specifically, size of the error that will remain after interpolation--but also the amount of trim data is controlled to maintain a significant advantage in overall transmission time, relative to transmitting the entire image-data set. The amount of trim data is held roughly to a certain fraction, about five percent, of the number of points in each data block (e. g., swath), essentially independent of the error evaluation. Preferably this controlled amount of trim data is padded out with zeroes to form a complete trim-data array--which is then run-length encoded. The encoded trim data and the subsample are sent to the printer. (Preferably pure-text portions are sent separately.) The printer applies the trim data to the interpolated subsample to obtain a better approximation to the original image data.
摘要:
Methods and systems for accommodating color ranges are provided. A source light-to-dark dynamic range of a first output medium may be obtained with a source white point and a source black point. A destination light-to-dark dynamic range of a second output medium may be obtained with a destination white point and a destination black point. A white point mapping and a black point mapping may be determined. Based on a first representation of an image on the first output medium, a second representation of the image may be created by interpolating the source light-to-dark dynamic range to the destination light-to-dark dynamic range based on the white point mapping and the black point mapping. A computing device may cause the second output medium to produce the representation of the image.
摘要:
A method for creating a run-time color-conversion look-up table is provided. A conceptual representation of a slice of a color conversion object is presented. The color conversion object is defined by a color coordinate system having a neutral axis and a plurality of color axes. The slice is defined by a plurality of grid points on the color coordinate system that are in a common plane orthogonal to the neutral axis. In addition, the slice is bound along a plurality of faces of the color conversion object for which at least one of the plurality of color axes is at a minimum or maximum value. The method further includes applying design rules for certain grid points and determining outputs for other grid points. The outputs for the slice are stored in a portion of the look-up table. A tool for creating a 3D look-up table is also described.
摘要:
Methods and systems for accommodating color ranges are provided. A source light-to-dark dynamic range of a first output medium may be obtained with a source white point and a source black point. A destination light-to-dark dynamic range of a second output medium may be obtained with a destination white point and a destination black point. A white point mapping and a black point mapping may be determined. Based on a first representation of an image on the first output medium, a second representation of the image may be created by interpolating the source light-to-dark dynamic range to the destination light-to-dark dynamic range based on the white point mapping and the black point mapping. A computing device may cause the second output medium to produce the representation of the image.
摘要:
Methods and systems for managing distribution and retrieval of data (for example advertising content and viewing statistics) and insertion of control logic (for example display of advertising content) into pre-existing mobile applications. In some arrangements the method includes analyzing the pre-existing application in the context of the target platform and the desired placement of new content, and instrumenting the application to support the addition of the new content. The instrumenting process can include modification of the application to support one or more of features selected from a group comprising user identification, usage tracking, bi-directional communication with an advertising server, and displaying advertising content. The analysis and instrumenting process can be applied in a just-in-time fashion during application download. In some arrangements, a portal application can be provided to reside on the mobile device for managing communications with an advertising server.
摘要:
A method for creating a run-time color-conversion look-up table is provided. A conceptual representation of a slice of a color conversion object is presented. The color conversion object is defined by a color coordinate system having a neutral axis and a plurality of color axes. The slice is defined by a plurality of grid points on the color coordinate system that are in a common plane orthogonal to the neutral axis. In addition, the slice is bound along a plurality of faces of the color conversion object for which at least one of the plurality of color axes is at a minimum or maximum value. The method further includes applying design rules for certain grid points and determining outputs for other grid points. The outputs for the slice are stored in a portion of the look-up table. A tool for creating a 3D look-up table is also described.