An image processing apparatus includes a plurality of memories for storing input image data in units of lines, and a processing unit for controlling write and read access operations of the memories to perform mosaic processing of an input image.

An image reader to detect a width size and a length size of a manuscript without moving an optical image read device. A front end detector inputs binary coded data of a shading line of a front end of the manuscript, counts a number of black pixels in a lengthways direction of the shading line, calculates a width size of the front end of the manuscript from a counted value, and outputs a front end detection signal for representing that the front end of the manuscript passes through an image read ...

A filtering process and an interpolating operation process are carried out in steps on an original image signal and, in the respective steps, a plurality of unsharp image signals are formed, which represent images having the same size as the size of the original image and have different frequency characteristics. Band-limited image signals are formed from the unsharp image signals and the original image signal, restricted by conversion, and integrated. An integration signal composed of predeterm...

A method and system of compressing digital image data organized as successive data groups of bits, the contents of which are values of pixels of an image, by checking a first condition of whether a first data group has the same contents as one or more following data groups. If the first condition is satisfied, then the data groups are replaced, in a compression step, by a compression code representing these data groups. Otherwise, in a copying step, only the first data group is replaced by a cod...

An image scanning device is provided that includes: an imaging lens; a linear image sensor; a rotating scanning system; and a shading correction system that corrects each pixel image signal for shading in accordance with image height and a magnification of the imaging lens. The magnification of the imaging lens changes according to the rotational position of the scanning system. The image scanning device may further include a color filter and a color correction system for correcting the pixel im...

A method and apparatus for compression of data. The invention provides for the application of a plurality of compression schemes to the data such that improved compression ratios are achieved. A first embodiment provides for compression of each pixel by one of a plurality of different entropy-based compression schemes based upon a probability cost analysis. A second embodiment provides for compression of each pixel based on a hybrid context formed using a plurality of compression schemes for imp...

An image forming apparatus includes a heater for generating heat upon reception of electric energy; a film movable with a recording material having an unfixed image; and a pressure roller for forming a nip with the heater, with the film interposed therebetween; wherein the pressure roller starts to rotate at the same time as a main power switch of the apparatus is turned on.

A method of improving a digital image is provided. The image is initially represented by digital data indexed to represent positions on a display. The digital data is indicative of an intensity value I.sub.i (x,y) for each position (x,y) in each i-th spectral band. The intensity value for each position in each i-th spectral band is adjusted to generate an adjusted intensity value for each position in each i-th spectral band in accordance with ##EQU1## where S is the number of unique spectral ban...

An image processing apparatus converts color image data into hue, saturation and luminosity data. When a specific color portion and a range are designated in the hue data, processing for reducing tones is executed based on the designated data. Thereafter, a reverse-conversion into color image data is performed, thereby making it possible to output a high-quality image of an illustration. Further, a histogram of designated hue data is generated, processing for reducing tones is executed based on ...

A television set speaker system enables stereophonic audio reproduction with a "live" feeling when a television set receives programming in stereo. Such a system includes two front speakers for radiating sound in a forward direction from a cathode ray tube screen and reflection type directional intensifier speakers provided on the right and left sides of the top of the television set for radiating sound diagonally forward and outward in relation to the cathode ray tube screen.