摘要:
A display apparatus is configured to control a clock generator so that a phase of a clock can maximize an integrated evaluation value that is an integrated value of a differential absolute value between adjacent pixels in an image display unit over one frame of a plurality of digital video signals corresponding to a plurality of clocks having different phases generated by the clock generator when a value made by dividing a maximum value of the integrated evaluation value by a minimum value of the integrated evaluation value is larger than a threshold, and to control the clock generator so that the phase of the clock can correspond to an intermediate position in a phase range in which the position becomes constant relative to the phase of the clock when the value made by dividing the maximum value by the minimum value is equal to or smaller than the threshold.
摘要:
In order to produce a high-quality output of an image which is a mixture of images having different characteristics, there is provided an image processing apparatus having an image memory storing an entered color image and a feature detector, arranged for detecting a feature signal from the entered color image and storing the feature signal in the image memory. The feature signal represents a feature of the entered color image. An outputter is arranged for reading an image signal of the entered color image and the feature signal thereof out of the image memory, and outputting the image and feature signals as a recording signal. Processors are arranged for respectively processing one of a number of color components, which represent color image information, in accordance with the recording signal. The detection and storage in the image memory of feature signals and the readout of the image signal and associated feature signal from the image memory are performed in parallel.
摘要:
A PDL interpreter rasterizes image data, which are described in page description language, entered from a host computer, and stores the rasterized image data in an image memory. A CPU discriminates the type of image, pixel by pixel, by referring to the image data stored in the image memory, and stores a discrimination code, which indicates the result of discrimination, in a code memory. The CPU reads out image data that have been stored in the image memory and reads the discrimination code corresponding to these image data out of the code memory. The image data read out of the image memory are subjected to different binarizing processing by two binarizing circuits. Depending upon the discrimination code read out of the code memory, a selector selects the output of one of the two binarizing circuits and sends the selected image data to a printer. Accordingly, it is possible to obtain a high-quality image which is a mixture of images having different characteristics, such as an image containing character or line drawings, continuous grayscale images, etc.
摘要:
An image processing apparatus and method includes a device for judging the degree of color or lack of color of an input color image signal, judging dot areas in input color image signal and controlling a spacial filter or a density conversion device for processing the input image signal according to a judgment by the first and second judging results, the spacial filter or the density conversion device being controlled according to the judgment by the first and second judging results, wherein the image processing also includes the ability to independently set sharpness of each of a plurality of color component signals.
摘要:
A color image processing apparatus which judges a saturation of an input color image, and performs image processing in accordance with the saturation judgement result, includes an image input means in which a plurality of line sensors for generating color component signals on the basis of different spectral characteristics are parallelly arranged, and means for judging an achromatic area of the color component signals input by the image input means in accordance with a predetermined method. This arrangement performs saturation judgement when a printing operation using only black is performed for a black character or when it is judged whether an original document is a monochrome or color original document.
摘要:
A color image processing apparatus includes an input unit for inputting a plurality of color component signals representing a color image, a first operation unit for obtaining differences between a specified color component signal among the plurality of color component signals and other color component signals and outputting the differential signals, a second operation unit for smoothing-processing the differential signals obtained by the first operation unit, and a third operation unit for adding the differential signals smoothing-processed by the second operation unit and the specified color component signal and outputting the result as the other color component signals.
摘要:
An image processing apparatus includes a first judgment circuit for judging whether an input image is a monochrome image or a color image on the basis of an input image signal, and a second judgment circuit for judging whether a pixel represented by the input image signal is part of a character which is black. In an image processing method, a judgment is made as to whether an input image is a monochrome image or a color image on the basis of an input image signal, and a judgment is made as to whether a pixel represented by the input image signal is part of a character which is black.
摘要:
A color image processing apparatus includes an input device for inputting color image data representing a color image, a detecting device for detecting an edge of the color image based on the input color image, and a discriminating device for discriminating whether the color image is a predetermined color image in accordance with the detection of the edge and color distribution of the input color image data. The discriminating device includes a first memory device for storing the color distribution of a line image portion of the predetermined color image and a second memory device for storing the color distribution of a half-tone portion of the predetermined color image.
摘要:
In a method of expanding a compressed color image, in units of blocks each consisting of a plurality of pixels, to lightness information and chromaticity information representing a block, original lightness information is decoded on the basis of the compressed lightness information in units of blocks, and chromaticity information of each pixel in the block is decoded in accordance with a distribution and gradient of the decoded lightness information value.
摘要:
The display apparatus includes an image display element being driven based on a digital video signal, a quantizing part converting an input analog image signal into the digital video signal based on a quantization phase and a quantization frequency, and a converting part converting an input value into an output value, the input value being a difference value of signal values of pixels adjacent to each other in the digital video signal. The apparatus includes an accumulating part accumulating the output values from the converting part that converts the difference values obtained over entire pixels in one frame of the digital video signal to produce an accumulation evaluation value, and a controller adjusting the quantization phase in the quantizing part such that the accumulation evaluation value becomes maximum. The output values a(m) for the input values k1, k2 and k3 satisfy conditions of a(k1+1)−a(k1)