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7433531 |
Image pickup apparatus and method
The present invention relates to an image capturing apparatus and method in which the image recording time is reduced and the memory capacity required for compression is also reduced. A...
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7430330 |
Method and apparatus for optimizing a JPEG image using regionally variable compression levels
A method of JPEG compression of an image frame divided up into a plurality of non-overlapping, tiled 8×8 pixel blocks X i . A global quantization matrix Q is determined by either selecting a...
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7430332 |
Approximations used in performance sensitive transformations which contain sub-transforms
The present invention provides methods, apparatus and articles of manufacture for performing a transform equation in which at least two sub-transform equations can be identified. According to the...
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7426311 |
Object-based coding and decoding apparatuses and methods for image signals
An object-based coding apparatus and method for image signals, wherein upon scanning shape-adaptive transform coefficients of an input image signal transformed in accordance with a shape-adaptive...
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7424057 |
Data format transcoding apparatus and associated method
The present invention provides an apparatus for converting image data, including a block extraction unit extracts a class tap from a composite signal. A pixel-location-mode output unit determines a...
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7421152 |
Method for resizing an image using the inverse discrete cosine transform
A method and apparatus are provided for resizing an image using an inverse discrete cosine transform (IDCT). A macro block of an original source image is enlarged to an arbitrary size using the...
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7421135 |
Image data compression device and encoder
An image data compression device includes: a quantization section which quantizes image data in unit of a frame; a FIFO buffer section in which quantized data for at least N frames (N is an integer...
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7418134 |
Method and apparatus for foreground segmentation of video sequences
The present invention relates to a method and system for foreground segmentation in which frames of a video sequence are analyzed in the transform domain to determine one or more features. The...
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7412100 |
Apparatus and method for sub-sampling images in a transform domain
A method of receiving a bit-stream and extracting data from the bit-stream based on one or more criteria and sub-sampling (for example, filtering and decimating) the extracted data in the transform...
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7408991 |
Error detection in low bit-rate video transmission
A method for decoding video data blocks using variable length codes, comprising transforming information about the spatial frequency distribution of a video data block into pixel values. Prior to...
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7394941 |
Image predictive coding method
There is disclosed image predictive coding apparatus and method, image predictive decoding apparatus and method, and recording medium which stores therein the image predictive coding method or the...
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7395432 |
Method of embedding/detecting digital watermark and apparatus for using thereof
A watermark is embedded in spatial domain. However, the same effect as the watermark is embedded in frequency domain is obtained by inverse frequency transforming the watermark, and then embedding...
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7394928 |
Selection of coefficients for quantization processing based on whether an original image is a still image or a moving image
The present invention permits to determine an image characteristic amount for efficiently searching an image without affecting a bad influence upon searching accuracy. First image characteristic...
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7388999 |
Transformations for denoising images
Systems and methods of denoising images are described. In one aspect, spatially-shifted forward transforms of the input image are computed. Each forward transform is computed based on a denoiser...
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7388994 |
Method for reducing IDCT calculations in video decoding
Reduced complexity inverse discrete cosine transform (IDCT) masks and a method for reducing the number of IDCT calculations in video decoding are provided. The method comprises: accepting an n×m...
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7386729 |
Method of inserting/detecting digital watermark and apparatus for using thereof
For the purpose of designing watermark to be robust against image modification such as geometric modification (rotating, cutting, enlarging/shrinking, etc.), compression, and blurring, the...
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7386176 |
Image sending apparatus and image receiving apparatus for sending and receiving code sequence data
An image sending apparatus is provided, in which the image sending apparatus comprises an analyzing syntax of code sequence data, a generation unit generating another code sequence data from the...
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7376280 |
Video encoding and decoding
A method for encoding video with a two-dimensional (2D) transform separable to two one-dimensional (1D) transforms. The method receives an array of values for a sub-section of an image, performs a...
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7369706 |
Image-data processing device, image-data processing method, image-data distributing device and image-data transmitting system
An image processing device for processing an original image divided into a plurality of blocks that are made up of a plurality of picture elements from encoded image-data which is obtained by...
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7362471 |
Image-forming controller, method therefor, program, and storage medium
A controller for a four-drum printer eliminates a need for an expensive inter-drum delay memory, which has been conventionally used, to print an RGB image and allows a multifunction machine,...
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7356189 |
Moving image compression device and imaging device using the same
A moving image compression (or encoding) device including: a hardware processing section which compresses moving image data by hardware; a data storage section which stores the moving image data...
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7356082 |
Video/audio signal processing method and video-audio signal processing apparatus
A metadata extraction unit has a feature point selection and motion estimation unit 62 for extracting at least one feature point representing characteristics of the video/audio signals in a...
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7352904 |
Block decoding method and system capable of decoding and outputting data in a longitudinal direction
A block decoding method and system capable of decoding and outputting data in a longitudinal direction, which obtains a start address in an input compressed datastream for each block of a...
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7352811 |
Data encoding apparatus and method
A data encoding apparatus operable to encode a plurality of data blocks produces encoded data in accordance with at least one of a selectable target data quantity or a selectable target data...
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7346640 |
Image processing apparatus supporting both discrete cosine transform and discrete wavelet transform
An image processing apparatus supporting both discrete wavelet transform and discrete cosine transform with reduced hardware resources. The image processing apparatus is composed of an input unit...
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7343043 |
Image compression apparatus, method and recording medium storing an image compression program
An image compression apparatus and method, and a carrier wave encoded with a computer readable control program having instructions for use by a computer, perform an image compression process. A...
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7336842 |
Method and apparatus for generating data representative of features of an image
Image data representative of features of a respective plurality images are transformed using a two dimension discrete cosine transform (DCT), and the DCT sign coefficients of the respective DCT...
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7336838 |
Pixel-data selection device to provide motion compensation, and a method thereof
A pixel-data selection device providing motion compensation, and a method thereof. A first and a second storage parts store a current frame/field including first pixel-data and a previous...
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7333659 |
Picture encoder and picture encoding method
An encoder and an encoding method capable of improving the transfer efficiency in an encoding process is provided. The encoder determines the number of removed bit planes in order that the quantity...
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7327892 |
JPEG2000 encoder
The image quality value of the code block currently processed is monitored, and when it falls below a threshold, encoding of the code block is terminated (in other words, encoding in the subsequent...
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7321690 |
Device and method for detecting blurring of an image
A device and method for determining whether or not an image is blurred. The device and method comprises an input part for receiving an image; a block classification part for dividing the received...
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7321698 |
Methods and apparatus for transform coefficient filtering
According to the present invention, methods and apparatus for filtering transform coefficients are provided. Transform coefficients associated with an input bit sequence can be zeroed to provide...
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7313286 |
Reversible DCT for lossless-lossy compression
A reversible Discrete Cosine Transform (DCT) is described. The reversible DCT may be part of a compressor in a system. The system may include a decompressor with a reversible inverse DCT for...
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7310445 |
Classification of image blocks by region contrast significance and uses therefor in selective image enhancement in video and image coding
Determining image block significance based on region contrast, including partitioning an image into multiple regions of at least one pixel each, pairing any region with an unpaired, adjoining...
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7308147 |
Image processing apparatus, image recording apparatus, image reproducing apparatus, camera system, computer program, and storage medium
An image processing apparatus includes an image compression device which performs a discrete wavelet transform of pixel values for each rectangular portion to produce wavelet coefficients, and...
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7302107 |
JPEG encoding for document images using pixel classification
The invention provides a system and method for JPEG encoding an image that includes variable quantization for each block, depending upon the classification of each block, which is dependent on the...
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7295609 |
Method and apparatus for coding image information, method and apparatus for decoding image information, method and apparatus for coding and decoding image information, and system of coding and transmitting image information
An image information coding apparatus codes an input image signal in a manner optimized on the basis of the visual characteristics. In quantization, an input image signal is divided into blocks, an...
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7292730 |
Two-dimensional inverse discrete cosine transforming
Implementing a two-dimensional inverse discrete cosine transform function includes executing two one-dimensional inverse discrete cosine transforming functions. Each of the one-dimensional...
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7289679 |
System and method for measuring image quality using compressed image data
A system and method for determining image quality by analyzing DCT information. Included is a system for measuring image quality of a compressed image divided into a plurality of blocks, wherein...
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7286713 |
Method for detecting and classifying block edge from DCT-compressed image
The present invention provides a method for detecting and classifying block edges from DCT-compressed images, and more particularly, a fast method for classifying the edge direction of each block...
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7283675 |
Method and device for encoding and decoding a digitized image
For an edge image block, the DC part of the encoding information of the picture elements contained in the edge image block is separately determined and is subtracted from the encoding information...
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7283677 |
Measuring sub-wavelength displacements
Measurement systems and methods extend the use of optical navigation to measure displacements smaller than a wavelength of the light used to capture images of an object measured. Nanometer-scale...
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7280698 |
Method and apparatus for displaying noticeable image and system for remotely monitoring image
Coded, or compressed data of moving pictures is received through a transmission path. The picture type of the compressed data is detected from the received compressed data of moving pictures. If...
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7280669 |
Digital image watermarking apparatus and method
The present invention relates to a digital image watermarking apparatus and method. Luminance component of a digital image are transformed into coefficients of a frequency domain, and watermark is...
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7280595 |
Post-inverse-quantization AC prediction with a unified variable-length-decoding and inverse-quantization stage
A motion-picture-experts group (MPEG) decoder performs AC prediction to decode first-column or first-row coefficients that are coded as differences from corresponding coefficients in a prior block...
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7277585 |
Image encoding method, image encoding apparatus and storage medium
An image encoding method forms units respectively made up of a plurality of pixels belonging to within one period of a digital image data having a periodic property, and carries out an encoding...
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7272261 |
Method and system for classifying scanned-media
A method for automatically classifying a printed image, includes scanning the printed image; selecting an n by n block of pixels from the scanned image; calculating an array of DCT coefficients of...
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7272263 |
Image decoding with a simplified process
A decoding unit ( 12 ) decodes an image according to JPEG 2000. A simplifying unit ( 30 ) comprises an automatic transformer ( 32 ) which compares an elapsed time to a time limit at each stage of...
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7263239 |
Method for resizing images using the inverse discrete cosine transform
A method for resizing images using the inverse discrete cosine transform (IDCT). The method enables digital video processing devices such as DVD players, digital broadcast receivers, or HD TVs to...
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7254276 |
Noise reduction in image capturing apparatus
An image capturing apparatus for capturing an image of a subject; has: an image pick-up unit for acquiring the image; and a noise reduction unit which removes a frequency component of a color...
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