Abstract: An image processing apparatus, includes an image classifier configured to determine whether an input image is a low-quality image or a high-quality image; and an image evaluator configured to determine a first predetermined number of clearest images from a plurality of low-quality images determined by the image classifier.

Abstract: A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.

Abstract: In a color digital imaging apparatus, a light source selector is provided for a user to select a proper illumination condition. When down loading the captured image in a computer system, a color correction function is performed at the computer system.

Abstract: An image processing apparatus for preventing overlap of the region of an image of an original with the positions of staples is provided. It is determined if the positions of staples set through an operation unit overlap with the image of the original read by a reader unit. If the result of the determination is affirmative, the distance between an end portion of the image and the positions of staples is calculated. The input image is subjected to parallel movement by an amount of movement corresponding to the calculated distance. An image obtained by synthesizing an image after the parallel movement and an image indicating the positions of staples set through the operation unit is displayed on a display device.

Abstract: Image processing techniques which involve direct manipulation of the compressed domain representation of an image to achieve the desired spatial domain processing without having to go through a complete decompression and compression process. The techniques include processing approaches for performing the eight operations in D4 (the dihedral group of symmetries of a square) on JPEG images using the discrete cosine transform (DCT) domain representation of the images directly. For a task such as image rotation by 90° (an operation in D4), DCT-domain based methods can yield nearly a five-fold increase in speed over a spatial-domain based technique. These simple compressed-domain based processing techniques are well suited to the imaging tasks that are needed in a JPEG-based digital still-camera system.

Abstract: A method and apparatus for compressing and decompressing texture patterns using a predefined two or more stage codebook with stored texture block vectors. The method of compressing includes selecting a texture block in the uncompressed texture pattern and determining a distortion value of the selected texture block as compared to a texture block vector stored in the two or more stage codebook. The distortion determination is repeated for a different texture block stored in the two or more stage codebook, until the determined distortion value is the smallest for all texture block vectors stored in the two or more stage codebook. The indices of the stored texture block in the two or more stage codebook are retrieved and stored. The retrieved indices are stored in an index block within an index map, wherein the index blocks correspond to texture blocks in the texture pattern. The two or more stage codebook is generated from a representative texture pattern.

Abstract: In an image coding method of the present invention, after a process such as DCT is performed to digital image data, quantization process is performed, and then, to resultant quantized transform coefficients, variable length coding process is performed with reference to a variable length code table showing how variable length codes are allocated, and in a comparison process between an event derived from the quantized transform coefficients and a reference event included in the variable length code table, transformation process is performed to increase a possibility of performing variable length coding with satisfactory coding efficiency.

Abstract: A digital color image to be processed is inputted at a color image input step, image segments are extracted from the input color image at an image-segment extraction step, and data of the extracted image segments is created. Next, image-segment components in each extracted image segment are discriminated at an image-segment discrimination step, and each extracted image segment is subjected to zoom processing, which conforms to the discriminated image-segment component, at an adaptive zoom step, thereby creating a zoomed image of the input image. The zoomed image that has been created is displayed, outputted as a hard copy or delivered to a transmission line at a color image output step. Accordingly, a color image in which image segments having different characteristics are mixed is efficiently processed.

Abstract: A method of compressing and decompressing a multi-dimensional image. Video data including luminance data distributed at least in two-dimensions is compressed for subsequent coding. The resulting codes are decompressed to reproduce the video data. A specific number of representative pixels are extracted from a plurality of pixels consisting of the digital signal of the video data. Texture data is also extracted from the digital signal of the video data. The representative pixels and the texture data are coded. The coded representative pixels and the texture data are then decoded. The video data is reproduced using the decoded representative pixels and the texture data.

Abstract: A bit-reversing method and system are disclosed for linearly scaling an image frame horizontally, vertically or both. The system includes a counter circuit for outputting the current frame-column number of the currently scanned pixel and the current frame-row number of the currently scanned frame-row. The numbers are bit reversed in a converter circuit. The bit-reversed current frame-column number is compared in a comparator circuit to a horizontal scaling constant which equals the number of pixels to be discarded in each frame-row of the image frame. The bit-reversed current frame-row number is compared in the comparator circuit to a vertical scaling constant which equals the number of frame-rows of the image frame to be discarded. If the bit-reversed current frame-row number is greater than the vertical scaling constant then the comparator circuit outputs appropriate signals to a scaling controller and an address generator for storing the currently scanned frame-row in a frame buffer.

Abstract: An improved method of generating a master pattern corresponding to a given denomination for use in a discrimination system capable of discriminating among currency bills of different denominations. The method comprises the steps of generating a plurality of component patterns for a given denomination by scanning at least one genuine bill of the given denomination and generating a master pattern for the given denomination. The master pattern is derived from an average of the component patterns. The component patterns represent analog variations in characteristic information detected from a genuine bill during scanning. The master pattern represents an average of analog variations of the characteristic information for the given denomination.