摘要:
A quasi-composite video signal generator incorporated in a microcomputer having a circuit for generating a quasi-composite video signal to be used to adjust a cathode ray tube (CRT) of a display unit, and the microcomputer being incorporated in the display unit. This generation circuit has a synchronous signal generation section for generating horizontal and vertical synchronous signals, a display setting unit for setting an image to be displayed, and a signal generator for generating a three-state signal Vout according to the image set by the display setting unit and the horizontal and vertical synchronous signals. The signal Vout is converted by a shaping circuit into the quasi-composite video signal, which is applied to drivers of cathode electrodes of the CRT.
摘要:
To provide an image detection method for judging whether a specific image is present in an input image by temporarily holding the input image signal, obtaining data from the held data like a circle having a radius r, calculating the characteristic value of the circular data, judging whether the characteristic value is included in a specific pattern in accordance with the similarity between the characteristic value and a reference characteristic value, obtaining data like a circle having a radius r' different from the radius r when judging that the characteristic value is included in the specific pattern, calculating a new characteristic value, and repeating the operation of judging whether the new characteristic value is included in a specific pattern over circular data having a plurality of radiuses. Thereby, it is possible to efficiently detect the presence or absence of a specific image whose arrangement conditions such as the angle and position in an input image are unknown.
摘要:
A multiple sub-sampling encoding/decoding system performing interfield and interframe offset sub-sampling of a broad bandwidth television signal. The system compresses the television signal to fit, for example, to the transmission bandwidth of the standard television systems, compensates the transmission characteristics, and achieves the optimal frequency allocation of the modulated transmission signal.
摘要:
There is provided an image printing apparatus having color materials of a plurality of colors including black and performing color printing using the plurality of color materials. The image printing apparatus includes a data acquisition interface that acquires color printing data (PDL data, etc.), a residual amount detection unit that detects the residual amount of the plurality of color materials, a drawing unit that draws the color printing data acquired by the data acquisition interface as printing data that is printable with a color material of black when the residual amount detection unit has detected that the residual amount of at least one color material excluding black is a predetermined amount or less, and a recording unit that executes printing processing on the basis of the printing data drawn by the drawing unit.
摘要:
Image compression and expansion with a high compression ratio includes encoding one block of data of an image, when data within the block are all equal, with a single representative value as gradation information and bit map data as resolution information representing that all the data within the block are equal. When there are variations in the data of the block and differences between the representative values in one block and those in an adjacent block are small, the difference values and flag bits, indicating that the gradation information represents the difference values, are used as the gradation information. When there are variations in the data of the block and differences between the representative values in the block and those in the adjacent block are large, absolute values of the representative values expressed in terms of bits smaller in number than the number of bits of the representative values and flag bits, indicating that the gradation information represents the absolute values, are used as the gradation information. Thus, coding compression of the image information is carried out with bit map data indicative of distribution of pixels of each group.
摘要:
An image compression method for encoding gradation image data for use in, for example, a printer or a copying machine handling the gradation image. When a difference between two representative values in one block E)f the image data is less than a predetermined amount, a block code made up of a single piece of gradation data and one pixel array pattern is generated. When the difference is not less than the predetermined amount, the representative values are replaced by any of sixteen substitute values, and a block code is formed to include two gray scale data each of four bits and a single pixel array pattern, thereby realizing coding compression of the image information.
摘要:
A system for performing high efficiency coding of an image signal includes a differential signal generating section, a processing section, a supply section, a coefficient train outputting section, and a code assigning section. The differential signal generating section generates a differential image signal between a current image signal inputted thereto and a prediction image signal inputted thereto for the current image signal with respect to a target block. The current image signal and the differential image signal each include a plurality of blocks and the target block is one of the plurality of blocks. The processing section executes processing of a one-dimensional orthogonal transform and a quantization for an inputted objective image signal, with respect to the target block, to generate the processing result as quantization coefficients. The supply section supplies the processing section with the differential image signal as the objective image signal with respect to the target block. The coefficient train outputting section generates a quantization coefficient train from the quantization coefficients. The code assigning section assigns a code to each quantization coefficient of the train to generate a transmission signal.