Abstract: An apparatus for generating codes includes a quantization unit which generates quantization coefficients by performing discrete wavelet transform with respect to each of tiles into which an image is divided, a block division unit which divides the quantization coefficients into blocks, a Hash conversion unit which performs Hash conversion based on the quantization coefficients of each of the blocks so as to produce a Hash value for each of the blocks, a digital watermark embedding unit which adjusts a parity of a quantization coefficient of interest equal to a parity of the Hash value of a block to which the quantization coefficient of interest belongs, and a coding unit which generates code sequence data by coding the quantization coefficients including the quantization coefficient whose parity is adjusted.

Abstract: An image processing apparatus hierarchically compresses and codes image data by subjecting pixel values of the image data to a discrete wavelet transform, quantization and coding for each of one or a plurality of rectangular regions into which the image data is divided. The image processing apparatus includes a hierarchical coding unit to compress and code the image data in a state where the image data is divided for each hierarchical layer, to obtain compressed codes, and a distributively storing unit to distributively store the compressed codes that are divided for each hierarchical layer by the hierarchical coding unit.

Abstract: In response to a partial codestream truncation command, a partial codestream truncation process unit temporarily truncates a code line of encoded data. The partial codestream truncation process unit can also temporarily truncate the code line frame by frame. In response to an undo command, a restoration process unit restores the encoded data that has temporarily truncated code line. The temporarily truncated frames are included in a group of frames of the moving image. In response to an undo releasing command, a code line discarding unit discards the temporarily truncated code line or frames. The encoded data has a form of JPEG2000 or Motion-JPEG2000.

Abstract: An image processing apparatus, an image reading apparatus, an image forming apparatus and a computer-readable recording-medium for storing an image processing program are disclosed. The image processing apparatus can synthesize coded data encoded in accordance with JPEG 2000 standard from source and target images at a higher speed with less use of a memory. The image processing apparatus includes a search part and an objective block synthesis part. The search part searches coded data of the source image per predetermined independently processable block for an objective block corresponding to a designated synthesis area. The objective block synthesis part synthesizes detected coded data of the objective block of the source image and coded data of the objective block of the target image.

Abstract: An encoding process and a recompression process of encoded data are disclosed that appropriately select low-order bit planes and low-order sub bit planes, codes corresponding to which are not to be output. The low-order bit planes and low-order sub bit planes are selected based on an inverse value of the square root of the subband gain of inverse wavelet transform, such that the selected low-order bit planes and low-order sub bit planes are not encoded, or alternatively, are encoded, but later discarded during packet generation.

Abstract: An image coding apparatus compressing and encoding image data, includes a frequency converging unit to perform frequency conversion on the image data; a bit-plane encoding unit to perform bit-plane encoding on coefficients obtained from the frequency converting unit; and a code discarding unit to discard codes obtained from the bit-plane encoding unit until a present code amount becomes a predetermined code amount. The code discarding unit includes a first discarding unit to perform the discarding operation on a basis of a first code unit; and a second discarding unit to further perform the discarding operation on a basis of a second code unit that is smaller than the first code unit, if necessary, after the discarding operation on the basis of the first code unit is performed by the first discarding unit.

Abstract: An image processing apparatus is provided with a converting unit to subject an image data to a hierarchical two-dimensional wavelet transform, a coding unit to code each of a plurality of sub-bands which are hierarchically generated from the image data by the converting unit, and a code quantity control unit to control, based on a code quantity of a predetermined sub-band, code quantities of other sub-bands.

Abstract: An apparatus for coding an image while scrambling the image by randomizing pixel values includes a scrambling unit which scrambles an image by utilizing an encryption function to compute a displacement of a pixel value to be randomized in response to a displacement of a previously randomized pixel value.

Abstract: An image compressing apparatus divides an image into plural tiles, decomposes each tile into plural sub band by frequency conversion, and conducts bit plane encoding of each sub band for each encoding unit, wherein the image compressing apparatus includes a code discarding unit selectively discarding a code obtained by the bit plane encoding for each encoding unit, and wherein the code discarding unit includes a discard amount setting unit that makes generally even the amount of code discarding in the encoding units that are in mutually adjacent relationship across a tile boundary.

Abstract: An image processing apparatus includes an image data acquisition unit to acquire first encoded image data of a first data size, an image data creation unit to create a second encoded image data of a second, smaller data size than the first data size from the first encoded image data, a display unit to display an image corresponding to the second encoded image data in a displayunit, an editing unit to accept an edit operation to the image displayed in the display unit and for applying an edit processing corresponding to the edit operation to the first encoded image data, and an edit-result manifesting unit to manifest a result of the edit processing to the second encoded image data.

Abstract: An image processing apparatus is disclosed including: a header/code-data separating unit that separates a codestream of an image into header portions and code-data portions; a header processing unit that edits the separated header portions for generating a new codestream of a portion of the image; a code-data processing unit that selects code-data corresponding to the portion of the image from the separated code-data portions; and a codestream generation unit that generates the new codestream by combining the edited header portions and the selected code-data. The image processing apparatus can generate a new codestream and decomposite the portion of the image without decoding the codestream of the image.

Abstract: An image processing method carries out a compression process which divides an image into a plurality of divided regions and compresses the divided regions in a state where each of the divided regions are independent of one another, and sets boundaries of the divided regions in order to approximately match boundaries of one or a plurality of image regions which are within the image and have aspect ratios and/or sizes different from those of the image.

Abstract: An image processing apparatus is disclosed that includes a size adjusting unit and an encoding unit. If the size of a region is fixed, and as a result, an image to be processed by the image processing apparatus is not divisible into the regions, the size adjusting unit adjusts the size of the image so that the image becomes divisible into the regions. The encoding unit encodes the image by the regions and generates a codestream. Accordingly, even if the region is fixed in size, the image can be encoded.

Abstract: A system is disclosed for reproducing a moving image encoded into an encoded data stream in accordance with JPEG 2000 that includes a reproduction apparatus and a transmission apparatus. The reproduction apparatus transmits a reproduction condition being set by a setting unit provided therein, the reproduction condition set in accordance with the user's operation, to the transmission apparatus. The transmission apparatus transmits an encoded data stream reconfigured by a reconfiguration unit based on the reconfiguration method determined by a determination unit based on the reproduction condition. When determining the reconfiguration condition, the determination unit may take a traffic condition of a communication channel into consideration. According to the above embodiments, the system does not need to transmit an original encoded data stream via the communication channel but can transmit the reconfigured encoded data stream that contains only encoded data for satisfying a user's requirement.

Abstract: An image processing apparatus is disclosed, including: a dividing unit, a generating unit, an encoding unit, and a combining unit. The dividing unit divides the image into regions based on a division signal, where the division signal indicates image regions of an image. The generating unit generates components corresponding to the regions divided by the dividing unit. Each component is independently encoded by the encoding unit, and is combined into the codestream by the combining unit.

Abstract: An image processing apparatus for reproducing a moving image from its encoded data is disclosed. The apparatus includes a decoding unit to decode the encoded data, and a control unit to control the decoding by the decoding unit. The control unit inhibits image reproduction by partial decoding in the decoding unit with respect to the encoded data of a moving image having scalability.

Abstract: In a method for reversibly transforming a data format a forward transformation and a backward transformation are reciprocally conducted for data between unit systems having different resolution levels, and the forward transformation and the backward transformation, a first unit system having a lower resolution level is used as a common unit system, and a reversible data conversion is conducted by an integer operation for data in the first unit system having the lower resolution level and data in a second unit system having a higher resolution level higher than the first unit system.

Abstract: An image processing apparatus comprises a compression coding unit that performs compression coding of image data according to JPEG2000 algorithm. A coding style selection unit selectively activates coding functions of the compression coding unit in response to a discriminating signal, so that the active coding functions of the compression coding unit are suited to characteristics of the image data.

Abstract: A code stream generating part converts image data into two-dimensional wavelet coefficients, quantizes the same and coding the quantization result so as to compress the image data and generate a code stream. An additional information creating part creates additional information concerning the image data, and an additional information embedding part embeds the thus-created additional information into the code stream as a code in an off-rule zone which is not decoded by a JPEG 2000 standard rule.

Abstract: An apparatus for coding and decoding includes a decoding unit which decodes compressed and coded data to restore original image data, a storing unit which stores additional information other than the image data in memory, and a coding unit which encodes at least a portion of the additional information stored in said memory as information additional to the image data when performing second-time encoding of the image data decoded by said decoding unit.