Abstract: An image data processing apparatus includes: a printing part responsive to image signals for printing an image in a plain sheet in one of black and a different color based on a selection signal; a facsimile part for transmitting facsimile data via a communication line and for receiving facsimile data via the communication line; an image signal part for converting the received facsimile data into image data and for processing the image data to produce image signals indicating a facsimile reception image; a reading part for reading a copy image from a sheet by optically scanning the sheet and for producing image signals indicating the copy image; and a color setting part for setting a selection signal relating to each of image signals of a given pattern to a first value indicating the color if the image signals are received and for supplying the image signals and the respective selection signals to the printing part, and for setting a selection signal relating to each of the image signals of the reading part to

Abstract: A texture image processing system for image processing apparatus comprises, first calculator for calculating a maximum value and a minimum value of texture image data; second calculator for calculating an average value and a gain value with employment of said maximum value and minimum value; and synthesizing processor for synthesizing texture image data by image picture data, this synthesizing processor synthesizing the texture image data with the image picture data by multiplying a difference between the texture image data and the average value by the gain value. Also, synthesizing processor synthesizes the texture image data with chromaticity information of the image picture data, or chromaticity information of the image picture data with predetermined chromaticity information, chromaticity information of the texture image data.

Abstract: A method for performing image compression that eliminates redundant and invisible image components. The image compression uses a Discrete Cosine Transform (DCT) and each DCT coefficient yielded by the transform is quantized by an entry in a quantization matrix which determines the perceived image quality and the bit rate of the image being compressed. The present invention adapts or customizes the quantization matrix to the image being compressed. The quantization matrix comprises visual masking by luminance and contrast techniques and by an error pooling technique all resulting in a minimum perceptual error for any given bit rate, or minimum bit rate for a given perceptual error.

Abstract: In an image forming apparatus according to the present invention, characteristics correcting data for correcting input gray level-output gray level characteristics for each of a plurality of steps into which input gray levels are divided are inputted by inputting means. At the time of image formation processing, input gray level-output gray level characteristic data are corrected on the basis of each of the characteristics correcting data inputted by the inputting means.

Abstract: An infrared-rejecting device is positioned in a light path and tilted thereto to reflect infrared radiation and to prevent infrared radiation from being applied to a photodetector or a line sensor for preventing the photodetector or the line sensor from operating in error or from suffering a reduction in its resolution. The infrared-rejecting device may be positioned out of the light path to allow light applied to the photodetector or the line sensor to remain unattenuated, i.e., to prevent the light applied to the photodetector or the line sensor from being reduced in intensity.

Abstract: A facsimile transmission control system having a standard facsimile procedure which generates an output when at least one line of an image is correctly decoded and receives instructions from a transmitting facsimile. The current instruction is compared with a previous instruction and a time interval between instruction is measured. A proper response to an instruction sent by the transmitting facsimile is generated by the receiving facsimile based on the generated output when at least one line is properly decoded, the comparison of the two instructions, and the time interval between the instructions.

Abstract: A method of calibrating the response of the printer to an image described in terms of colorimetric values, including the steps of: a) setting printer parameters; b) deriving a printer response characteristic by printing a calibration test from device dependent printer signals stored in a device memory, the calibration image including a plurality of color patches, some of which may be repeated at a plurality of locations on the test image at spatially disparate locations selected to keep local printer non-uniformities from affecting both locations; c) measuring printer response characteristics in device independent terms; d) generating a memory mapping of device independent colors to printer responses for subsequent use in printing images defined in device independent terms.

Abstract: An image reading apparatus includes a projector for projecting light through a translucent film so as to produce a projected image from an original image on the film, a correction part for adjusting a quantity of the light, an image sensor for reading out an image from the projected image and outputting an analog signal indicating the read-out image, a signal conversion part for converting the analog signal into a digital signal indicating the read-out image, and a control part for measuring a peak value of digital signals supplied by the signal conversion part with respect to an effective range of the original image, and for allowing the correction part to adjust appropriately the quantity of the projected light in response to the measured peak value of the digital signals.

Abstract: A digital image processing system digitizes and stores photographic film images in their captured orientation on film, in order to obviate the need to physically rotate the film scanner relative to the film for vertical images, thereby significantly reducing the complexity and cost of the scanner. Instead, each stored image file has an associated presentation control file, which contains orientation and aspect ratio information, so that the image playback device will know how each image has been stored on the digital image database, such as a compact disc. When the disc is inserted into a playback device for driving an output display such as a color TV monitor, the playback device is readily able to decode the playback control information in the course of reading out the digitized image, so that the image will be displayed in an upright orientation and at the correct aspect ratio for the display.

Abstract: An image processing apparatus in which a moire occurring in a half tone area can be eliminated by a suitable filter. A plurality of data blocks comprising N*N pixel data are transformed by means of a two-dimensional orthogonal transform so as to obtain an N*N matrix transformation factor block. An evaluation block is prepared which comprises N*N transformation factors each of which is the mean value of the absolute values of corresponding factors from a data block being considered and data blocks surrounding the data block to be determined. Mean values A[i] and B[i] (i=0 to L-1) of predetermined transformation factors are calculated, A[i] being mean values of factors included in a number L of first areas consecutively positioned along a diagonal line of the evaluation block, B[i] being mean values of factors included in a number L of second areas positioned adjacent to and lower in frequency to the corresponding first areas.

Abstract: A pseudo-color image output system has an image input unit for reading a full-color image and outputting multi-valued data of three primary colors, and an image output unit for digitizing the multi-valued data of three primary colors output from the image input unit and for outputting the pseudo-color image by controlling a total area of color dots in a unit area. The image output unit has a plurality of three-dimensional color compensation tables each provided for every type of the image input units connectable to the image output unit, for compensating errors between output and input colors and selector for selecting one of the three-dimensional color compensation tables depending on the type of the image input unit.

Abstract: A device for recording and retrieving images corresponding to a plurality of documents is based on an apparatus which generates images which respectively correspond to a plurality of original documents, rotates those images to provide a more meaningful image for the user, and records those images on a recording medium. The image corresponding to each document which is scanned subsequent to the first document is rotated based on whether the image corresponding to the first document is rotated or not. A comparison between a pixel count on the image corresponding to the first document may be compared with a pixel count corresponding to each subsequently generated image to determine whether such rotation should be performed. Original documents are scanned in the sub-scanning direction and rotated after scanning to increase scanning speed. Retrieval data for each image is stored for retrieval purposes.

Abstract: There is disclosed a housing for a thin, flat display screen such as a liquid crystal display. The housing is formed of components comprising a front housing section having a front panel with an opening for exposing the screen of a flat screen device placed within the housing and a rear cover therefor which includes a hinged attachment to the front housing section which is recessed and inaccessible from the exterior of the closed housing. The assembly of front housing section and rear cover is secured with tangs carried on the lower rear edges of these components. The housing is adapted to be mounted in the chair arm of a passenger seat of commercial airliners, and includes a mounting bracket permitting it to be stowed within the chair arm when not in use. In this application it is essential that the housing have an outer covering of impact absorbing material to protect passengers from injury upon impact against the housing. It is also important that the housing be tamper and intrusion proof.