Ricoh Company, Ltd.

Ricoh Company, Ltc.

Toshimi Yamamura

Hiroyuki Kawamoto

Takeharu Tone

Satoshi Ohkawa

Yasunobu Shirata

Atsushi Togami

Shuji Kimura

Tomoyuki Yoshida

Toshiya Hikita

Takumi Nozawa

Akira Murakata

Yukihiko Tamura

Masato Ishii

Takanori Ito

An image processing apparatus in which the reusability of digital image data is improved is disclosed. The apparatus includes an image reading unit reading a draft and obtaining the digitized image data; an image writing unit printing image data on a transfer paper; a recording unit recording image data and attached information of the image data; an external I/F unit transmitting and receiving image data and attached information of the image data; a first and a second image data processing units processing the image data from the image reading unit and the recording unit, respectively; and a bus controlling unit connecting each of the units. The first and the second image data processing units match the characteristics of the image data to prescribed characteristics so that the matched image data can be usable for both the image writing unit and the external device.

Image processing apparatus

A disclosed image forming apparatus includes an image scanning unit configured to generate image data by converting light reflected from an optically scanned printed page into electrical signals; an interface configured to receive image data from an external apparatus; an expansion bus to which the image scanning unit and the interface are connected; a bus control unit configured to control the expansion bus; an image data storage unit configured to store the image data; at least one image processing unit connected to the expansion bus and configured to perform an image processing operation on the image data; a task management unit configured to send an image processing request to the image processing unit; and an image writing unit connected to the expansion bus and configured to print the image data on which the image processing operation has been performed by the image processing unit.

Image forming apparatus, image processing unit, image processing method, and recording medium having image processing control program with task management

When first image data, which is in a first color space, is converted into second image data, which is in a second color space corresponding to an image output unit. Upon converting the image data, if the first image data is color data, background removal process is switched OFF. Otherwise, the background removal process is switched ON. Thus, it is possible to obtain an image desired by a user.

Image processing apparatus, image processing method, and computer product

An image processing apparatus and an image forming apparatus can easily handle various kinds of documents including a special document and a normal document without problems of counterfeit by copy. The image processing apparatus and the image forming apparatus have a circuit for processing image data. A signal generating circuit generates a signal to prevent an image formation of a specified document. The signal generating circuit is detachably attached to the circuit for processing image data.

Image processing apparatus and image forming apparatus

When image data is determined to be reused, a first image-data processing unit performs a first image processing on the image data, a memory device accumulates the image data on which the first image processing is performed, and a second image-data processing unit performs second image processing on the image data accumulated in the memory device. When the image data is determined not to be reused, the first image-data processing unit performs a first image processing, and the second image-data processing unit performs a second image processing on the image data on which the first image processing is performed.

An error adding step adds together input multi-tone image data and peripheral error information. An adding/subtracting step adds to or subtracts from multi-tone image data calculated by the error adding step, a random number in a matrix prepared for each set of pixels of the input multi-tone image data. A quantizing step quantizes multi-tone image data calculated by the adding/subtracting step into image data, the number of bits of which image data being smaller than the number of bits of the multi-tone image data calculated by the adding/subtracting step. An error calculating step calculates an error based on the multi-tone image data calculated by the error adding step and the image data quantized by the quantizing step. An error storing step stores the error calculated by the error calculating step for each peripheral pixel. An error operation step calculates peripheral error information based on the error stored by the error storing step for each peripheral pixel, and provides the peripheral error information to the error adding step.

A processor processing method suitable for a processor system. The processor system comprises a CPU, a ROMcoupled to the CPU, and a DSPhaving a memory unitfor storing programs and a processor unitfor processing data according to the programs. The ROM stores a plurality of programs and parameters required for processing the programs to the ROM. The CPU downloads an initial program to the memory unit of the DSP when a power is turned on. Then, the programs and the parameters corresponding to each process request from the system processor external are transferred from the ROM to the memory unit of the DSP. The data to be processed is input from the external of the processor system to the DSP; processing the data by the processor unit based on the programs and the parameters that are transferred to the memory unit, and then the processed data is output to the system processor external.

Method and system for processing using a CPU and digital signal processor

An error adding portion adds together input multi-tone image data and peripheral error information. An adding/subtracting portion adds to or subtracts from multi-tone image data calculated by the error adding portion, a random number in a matrix prepared for each set of pixels of the input multi-tone image data. A quantizing portion quantizes multi-tone image data calculated by the adding/subtracting portion into image data, the number of bits of which image data being smaller than the number of bits of the multi-tone image data calculated by the adding/subtracting portion. An error calculating portion calculates an error based on the multi-tone image data calculated by the error adding portion and the image data quantized by the quantizing portion. An error storing portion stores the error calculated by the error calculating portion for each peripheral pixel. An error operation portion calculates peripheral error information based on the error stored by the error storing portion for each peripheral pixel, and provides the peripheral error information to the error adding portion.

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Kanagawa, Japan

Toshimi Yamamura