Ricoh Company, Ltd.

Yukiko Yamazaki

Takahiro Yagishita

Nekka Matsuura

Hiroshi Ishii

Koji Kobayashi

Hiroyuki Shibaki

Tsutomu Kawase

Hiromi Okubo

Hirohisa Inamoto

Shogo Oneda

Yoshiaki Nishizaki

Takahisa Yamaguchi

An apparatus includes an apparatus body and a battery pack removable from the apparatus body. Each of the apparatus body and the battery pack includes a memory unit configured to store a use permission flag written after authentications for a pair of the apparatus body and the battery pack through near field communication with a portable terminal, and a control unit configured to permit energization when the use permission flag of the memory unit is ON.

Apparatus, apparatus authentication management system and apparatus authentication method

An image processing device is disclosed that classifies images in an image database and displays the classified images for searching, and is able to easily narrow a range of candidate images and improve operability. The image processing device includes a first classification unit, a display image controller that generates a display image for displaying a status of the classification performed by the first classification unit; a second classification unit that enables a user to select one or more categories included in the display image, and classifies image documents included in a selected category; a detection unit that detects a searching status; and a classification key selection unit that selects a classification key for the second classification unit in response to detection results of the detection unit.

Image processing device with classification key selection unit and image processing method

When this image processing device forms an image on a sheet, an image data storage unit stores image data received by an image data reception unit. An image formation count unit counts the number of times the image of the stored image data is formed by an image output unit. An information addition unit adds additional information to the image data according to the counted number of times. The image output unit forms the image of the image data together with the additional information on the sheet.

Image processing device forming an image of stored image data together with additional information according to an image formation count

An image encoding method forms units respectively made up of a plurality of pixels belonging to within one period of a digital image data having a periodic property, and carries out an encoding using the units as units of encoding, so that two units which are consecutively encoded are separated by an integer multiple of the period.

Image encoding method, image encoding apparatus and storage medium

A device for processing images includes a compressing/coding unit which encodes image data including a plurality of color components to produce fixed-length codes, a memory unit which stores therein the codes produced by the compressing/coding unit, a distribution-measurement unit which measures a distribution of the color components concurrently with the encoding of the image data performed by the compressing/coding unit, and a memory-control unit which releases a memory space assigned to part of the codes relating to colors in the memory unit if the distribution-measurement unit detects that the distribution concentrates on a particular color composition, and records data indicative of the particular color composition in the memory unit.

Efficient coding of color images including monochrome images

An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2&#xd7;2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency components is obtained from the 2&#xd7;2 pixel matrix block data. The transform factor is quantized by a fixed-length quantizing method by deleting a predetermined number of lower order bits of each of the frequency components.

Image processing system for compressing image data including binary image data and continuous tone image data by a sub-band transform method with a high-compression rate

A coding apparatus which can simplify a coding circuit and also simplify the processing of quantization. Image data that consists of R-, G-, and B-color components read from a scanner into buffers is subjected to transformation using a position correlation for each of RGB in position-correlation transformation sections. The DC component of each of the components is then color-converted in a color conversion section to be a DC lightness signal and DC color signals, and the signals are quantized in a quantization section and a coding section. Whereas, the AC components of each of the components are subjected to quantization in a first step in an AC component quantization section, and further to color conversion in a color conversion section to be an AC lightness signal and AC color signals. The signals are quantized in a second step in a quantization section and a coding section.

Coding apparatus, decoding apparatus, coding method, decoding method, amd computer-readable recording medium for executing the methods

An image processing system which compresses an image including both a binary image and a continuous tone image by a sub-band transform method with a high compression rate. A 2&times;2 pixel matrix block is extracted from image data. A transform factor having a plurality of frequency components is obtained from the 2&times;2 pixel matrix block data. The transform factor is quantized by a fixed-length quantizing method by deleting a predetermined number of lower order bits of each of the frequency components.

A dividing portion divides input image data into a plurality of block data, a block expressed by each of said plurality of block data comprising a pixel matrix of the same predetermined size. A transform portion transforms each of the plurality of block data by a frequency transform method so as to produce a transform factor. A quantizing portion, having a plurality of quantization tables, quantizes the transform factor using one of the plurality of quantization tables. An encoding portion encodes an output of the quantizing portion. A reverse transform portion restores image data from the output of the quantizing portion. A measuring portion measures an error between the input image data and the image data restored by the reverse transform portion. The quantizing portion quantizes the transform factor again using another one of the plurality of quantization tables when the error measured by the measuring portion exceeds a predetermined threshold value.

Image processing system and image processing method

An image processing apparatus includes a converter, a calculator and a reverse converter. The converter performs a frequency conversion operation on a color image signal which includes a brightness signal and color signals and divides values of each of the brightness signal and the color signals into high frequency coefficients and a low frequency coefficient. The calculator calculates the high frequency coefficients of the brightness signal and the color signals, generates a set of different high frequency coefficients, and produces a new brightness signal by adding the low frequency coefficient of the brightness signal to the set of different high frequency coefficients. The reverse converter performs a reverse frequency conversion operation on the new brightness signal.

Method and apparatus for image processing for performing a color conversion

An image processing apparatus for inputting image data from an external image input device and outputting the inputted image data to an external image output device after processing the data, the image processing apparatus including a data compression device for compressing the inputted image data by a variable-length data compression method. An image data storing device stores the inputted image data therein. A control device controls the apparatus, such that, when a size of an output image of the inputted image data is larger than a predetermined size, the data compression device compresses the inputted image data by the variable-length data compression method and the image data storing device stores the compressed image data therein, and, when the output image of the inputted image data is equal to or smaller than the predetermined size, the image data storing device stores the inputted image data therein without data compression.

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Kanagawa, Japan

Yukiko Yamazaki