Abstract:
A compression device has one or more compression parameters. An image data generation device successively performs new test imaging and successively supplies new first type image data to the compression device. The compression device compresses at least two of the first type image data among the first image data successively supplied, with the different compression parameters. A processing device decides the parameter value to be used for the second type image data from the at least two first type image data which have been compressed with the different compression parameter values, according to a predetermined reference. Furthermore, the processing device sets the value of the compression parameter of the compression device as the value which has been decided.
Abstract:
An image pickup apparatus and method capable of reducing the image recording time and reducing the memory capacity required for compression processing. A byte counter (302) calculates the number of bytes after compression according to the integration value of the high frequency integration data supplied from a high frequency integration processor. A Q scale calculator (303) calculates a Q scale capable of compressing the image data to a predetermined data size by one operation according to the number of bytes calculated. A Q table creator (304) creates a Q table according to the Q scale. A DCT unit (321) performs discrete cosine transform to the input image data. A quantization processor (322) adjusts the compression ratio of the image data according to the latest Q table supplied from the Q table creator (304). A variable length coding processor (323) encodes the image data by the variable length code such as Huffman code and outputs the data as compression image data. The present invention can be applied to a digital camera.
Abstract:
A method of managing storage in a document image database (14) using document analysis (32) to partition documents into logical regions and modified by reducing storage size of the regions using different reduction modifiers according to various storage preference rules (78). Storage preference rules are intended to maintain high quality representations of important document information while reducing storage requirements at the expense of lesser important aspects of the document. In particular, the different reduction modifiers (34) applied to stored document images include reducing sampling depth, reducing sampling resolution based on minimum font size, utilizing lossy and lossless compression schemes and discarding unimportant regions of document image. Over time, document analysis and modification can be repeated to further reduce the storage size of previously stored data files (50, 52, 54).
Abstract:
A cellular modem (100) is configured in one of two modes of fax operation: a standard fax mode or an extended fax mode. In the standard fax mode, the cellular modem (100) completes calls as in the prior art. In the extended fax mode, fax information is transmitted over a cellular portion of the cellular fax call using a "2-D" fax compression scheme and a data modulation as specified in AT & T Paradyne's "Enhanced Throughput Protocol" (ETC). In this mode of operation, "AT-commands" related to establishing the fax connection are transmitted from the cellular modem (100) to a Mobile Switching Center (250) that includes a cellular modem pool (230). This allows fax-capable terminal equipment at the mobile end of the connection to communicate directly with a far-end fax-capable modem in the MSC notwithstanding the presence of an analog modem at the mobile end.
Abstract:
A store-and-forward image communications system for transmitting an image signal from a first terminal (24) to a second terminal (10) in one of a plurality of transmission modes which comprises: a transmission path (12, 14, 16, 18, 20) between the first and second terminals (10, 24); a first image signal interface (20) in said transmission path at which said image signal is received; a message store (116) connected to store and subsequently recall signals received at the first interface (20); a data store (302) containing at least one record (320) comprising preference data relating to preferred said transmission modes for at least one of said first and second terminals (10, 24); a transmission controller (118) selecting from said transmission control modes in accordance with said preference data; and a data updater (304) arranged to update the or each said record (320).
Abstract:
In carrying out the data communication, the character code data and the image data are respectively divided into different block regions and, further, the block region of image data is divided into block regions according to the image characteristics of image data. The data of the respective block regions are communicated, thereby maintaining good efficiency in data communication.
Abstract:
An electronic device is operated by receiving a first image file, generating a second image file by encoding the first image file using an encoding technique such that it is less complex to decode the second image file than it is to decode the first image file, and associating the first image file with the second image file.