Abstract: An image forming device is provides, which comprises a body to be scanned that moves in a sub-scanning direction; a writing means for scanning the body in a main scanning direction with a light beam according to image information to form a reference image on the body and repeating the scanning plural times to form plural images; and a second body on which the plural images are overlaid to form a color image. The writing means starts writing the reference image at a start time ty1 when a main scanning synchronizing signal is firstly generated by the writing means after a time tx1 when a predetermined time has lapsed from detection of an image forming start signal of the sub-scanning direction for the reference image. A start time for an image other than the reference image is changed depending on the start time of the reference image.

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: 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: In a state deciding apparatus, an information acquiring unit acquires pieces of information of different types related to a state of an image forming apparatus. An index value calculating unit calculates an index value based on the pieces of information acquired. A state change deciding unit decides a change in a subsequent state of the image forming apparatus, based on a temporal change in the index value calculated.

Abstract: An image forming apparatus of the present invention includes a plurality of components that form image forming means and should be mounted or dismounted in a preselected order. Following one of the components with respect to the preselected order cannot be dismounted from the apparatus until preceding one of the same has been dismounted. The components are mounted to the apparatus in the reverse order. The components unremovable from the apparatus and positioned above the removable components in a preselected dismounting direction are retractable.

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 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 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 forming apparatus of the present invention includes a movable body to be charged and a charger including a charging member that contacts or adjoins the body to be charged and applies a voltage, including an AC component, to the charging member for thereby charging the body. A protection substance for protecting the surface of the body from deterioration ascribable to charging is caused to exist on the body. The number of particular elements, contained in the protection substance and detected by an X-ray photon spectral analyzer (XPS) in a zone where the charging member charges the body, is held in a particular ratio to the total number of all elements constituting the outermost surface of the body and also detected by the XPS.

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: 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: 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: An electrophotographic image forming apparatus of the present invention frees images from various defects including the thinning of horizontal lines, the omission of the trailing edge of an image, background contamination, granularity particular to a halftone image, carrier scattering, and image noise. Further, the apparatus of the present invention solves problems ascribable to patches used to sense image density. Moreover, the apparatus of the present invention faithfully reproduces tonality and has a high developing ability.

Abstract: 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.

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: A image processing apparatus transmits a codestream through a transmission path, the codestream being created from an image by dividing the image into rectangular portions and performing a discrete wavelet transform, a quantization and an entropy encoding for the respective rectangular portions of the image. The image processing apparatus comprises an error resilience inserting unit which inserts error resilience to respective code data of the rectangular portions prior to the entropy coding, and an error resilience setting unit which sets intensities of the error resilience inserted to the respective code data for the error resilience inserting unit, so that the error resilience intensities are different according to base units of the respective code data.

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.