Abstract: An example image scanning device includes an image sensor to scan a manuscript, a memory, and a processor to generate a scan image corresponding to the manuscript, perform rotation processing for the generated scan image using a scale factor, perform scaling processing for the rotated scan image, and store the scale-processed scan image in the memory.

Abstract: An example image scanning device includes an image sensor to scan a manuscript, a memory, and a processor to generate a scan image corresponding to the manuscript, perform rotation processing for the generated scan image using a scale factor, perform scaling processing for the rotated scan image, and store the scale-processed scan image in the memory.

Abstract: An image scanning apparatus includes a storage configured to store an image file, a user interface unit configured to receive selection of the image file stored in the storage and to display a thumbnail image corresponding to each of a plurality of pages contained in the selected image file, and a controller, in response to any one of the displayed thumbnail image being selected for a predetermined time period or more, to perform at least one of order change, delete, and partition of a page corresponding to the thumbnail image selected for the predetermined time period or more to edit the selected image file.

Abstract: An image scanning apparatus includes a scanning unit configured to scan an original document and generate a scanned image, a storage unit configured to store the generated scanned image, an image processor including a plurality of image processing modules, the plurality of image processing modules separately including a plurality of buffers configured to store the scanned image of block units, and configured to read the generated scanned image in preset block units and perform image processing on the scanned image read in block units sequentially using the plurality of image processing modules, and a controller configured to store the image-processed scanned image in the storage unit.

Abstract: An image scanning apparatus includes a scanning unit configured to scan an original document and generate a scanned image, a storage unit configured to store the generated scanned image, an image processor including a plurality of image processing modules, the plurality of image processing modules separately including a plurality of buffers configured to store the scanned image of block units, and configured to read the generated scanned image in preset block units and perform image processing on the scanned image read in block units sequentially using the plurality of image processing modules, and a controller configured to store the image-processed scanned image in the storage unit.

Abstract: An image processing apparatus and an image processing method that reduce data transmission time by transmitting data between internal memories of a codec without passing through a system memory. Reducing the number of accesses to the system memory increases processing speed, and reduces the load of a main processor, when image data is to be encoded or decoded.

Abstract: A high-speed binary image compression method, the method including calculating an estimation value of a current pixel based on a context value derived from neighboring pixels of the current pixel, determining whether a pixel value of the current pixel, the context value of the current pixel, and the estimation value of the current pixel are identical to one another, and determining whether the current pixel is a continuous pixel having a pixel value that is continuously identical to previous pixels input prior to the current pixel, determining whether the previous pixels are continuous pixels, if the current pixel is determined not to be continuous with the previous pixels, and coding the continuous pixels using a block unit having more than one pixel if the previous pixels are determined to be the continuous pixels, and determining block by block whether pixels input after the current pixel are continuous pixels if the current pixel is a continuous pixel, and coding the continuous pixels block by block.

Abstract: The nozzle error correction method is provided for adjusting information of an output image to correct an error nozzle. A position of an error nozzle firing an ink amount different from a reference value is detected from a plurality of nozzles. A determination is made from an input image as to whether a current pixel for output is an error pixel of the detected error nozzle. A channel value of the error nozzle is set to a certain value if the current pixel is the error pixel. However, if the current pixel is not the error pixel, a determination is made as to whether an error pixel exists in a certain area around the current pixel. A value of the current pixel is then adjusted based on error information. Image-processing is performed in order for the current pixel to be outputted, if the error pixel exists in the certain area. Accordingly, degradation of a print speed and a shortened life span of the head are prevented.

Abstract: A multiplication apparatus including a multiplier and multiplicand extractor for dividing the multiplicand into partial multiplicands and dividing the multiplier into partial multipliers, and for generating partial input pairs by combining the partial multiplicands with the partial multipliers, and a multiplication executor including identical partial multiplication modules for receiving the partial input pairs and outputting partial carries and partial products. The apparatus further includes an output generator for combining the partial carries with the partial products according to the execution instruction to generate a final output. For simple multiplications, each of the partial multiplication modules can pass data to and from an adjacent partial multiplication module to calculate the partial carry and the partial product, and pass bits exceeding its own multiplication coverage.

Abstract: An apparatus and method are provided for processing image data using error diffusion. The apparatus and method decode image data compressed in a joint photographic experts group (JPEG) format, convert the image data into color coordinates without storing the image data in a memory, and perform a binarization by calculating error values in accordance with the image data in the unit of block to generate a final output data which is 1 bit long. Since the apparatus and method for processing image data using error diffusion do not require an operation of transmitting and storing the image data to a system memory through a DMA controller, the performance of a system is improved. Also, since the memory does not require a large storage space to store the decoded image data, its utility is improved.

Abstract: A high-speed binary image compression method, the method including calculating an estimation value of a current pixel based on a context value derived from neighboring pixels of the current pixel, determining whether a pixel value of the current pixel, the context value of the current pixel, and the estimation value of the current pixel are identical to one another, and determining whether the current pixel is a continuous pixel having a pixel value that is continuously identical to previous pixels input prior to the current pixel, determining whether the previous pixels are continuous pixels, if the current pixel is determined not to be continuous with the previous pixels, and coding the continuous pixels using a block unit having more than one pixel if the previous pixels are determined to be the continuous pixels, and determining block by block whether pixels input after the current pixel are continuous pixels if the current pixel is a continuous pixel, and coding the continuous pixels block by block.

Abstract: The nozzle error correction method is provided for adjusting information of an output image to correct an error nozzle. A position of an error nozzle firing an ink amount different from a reference value is detected from a plurality of nozzles. A determination is made from an input image as to whether a current pixel for output is an error pixel of the detected error nozzle. A channel value of the error nozzle is set to a certain value if the current pixel is the error pixel. However, if the current pixel is not the error pixel, a determination is made as to whether an error pixel exists in a certain area around the current pixel. A value of the current pixel is then adjusted based on error information. Image-processing is performed in order for the current pixel to be outputted, if the error pixel exists in the certain area. Accordingly, degradation of a print speed and a shortened life span of the head are prevented.

Abstract: A multiplication apparatus including a multiplier and multiplicand extractor for dividing the multiplicand into partial multiplicands and dividing the multiplier into partial multipliers, and for generating partial input pairs by combining the partial multiplicands with the partial multipliers, and a multiplication executor including identical partial multiplication modules for receiving the partial input pairs and outputting partial carries and partial products. The apparatus further includes an output generator for combining the partial carries with the partial products according to the execution instruction to generate a final output. For simple multiplications, each of the partial multiplication modules can pass data to and from an adjacent partial multiplication module to calculate the partial carry and the partial product, and pass bits exceeding its own multiplication coverage.

Abstract: An image processing apparatus and an image processing method that reduce data transmission time by transmitting data between internal memories of a codec without passing through a system memory. Reducing the number of accesses to the system memory increases processing speed, and reduces the load of a main processor, when image data is to be encoded or decoded.

Abstract: A binary image generating method and apparatus using location information of minority pixels. A modified input pixel value u(m, n) is calculated by adding a value obtained by filtering an error value e(m, n) of a previous binary pixel to a currently input continuous tone pixel value i(m, n). An ideally optimum distance dopt(i(m, n)) between the currently input continuous tone pixel value i(m, n) and a minority pixel is calculated. A minimum distance dm between the input pixel and minority pixels is calculated using location information of the minority pixels at minimum distances from binary pixels adjacent to the input pixel. A threshold value t(m, n) is calculated using the ideally optimum distance dopt(i(m, n)) and the minimum distances dm for the currently input continuous tone pixel value i(m, n). The threshold value t(m, n) is compared with the modified input pixel value u(m, n) to determine a binary pixel value b(m, n) of the input pixel.

Abstract: An apparatus and method thereof to convert a level of an image includes a threshold value generator and a level converter. The threshold value generator considers at least two color components an input pixel has as the same color component, produces threshold values for the color components, and outputs the produced threshold values. The level converter converts a multi-valued luminance level of the input pixel into a bi-valued luminance level with reference to the threshold values, and outputs the bi-valued luminance level.