126 results about "Normalized correlation" patented technology

Scanned image portions of a virtual slide are stored in accord with a positional index metric associated to each image's location in a mosaic representation of the entire physical slide and a normalized correlation search is performed on next neighbor regional image blocks. A set of relative positional offset values and a correlation coefficient is determined for a regional image block and a next neighbor regional image block. A portion of the regional image blocks is viewed as a field of view of a display and a composite of the portion of regional image blocks is stitched together in accord with the set of relative positional offset values and the correlation coefficient, such that only the blocks comprising the portion are stitched. Moving the field of view of the display causes additional regional image blocks to be displayed, where image stitching is subsequently performed only with respect to the additional regional image blocks brought into the new field of view.

The present invention relates to a method and device for improving concealment of frame erasure caused by frames of an encoded sound signal erased during transmission from an encoder (106) to a decoder (110), and for accelerating recovery of the decoder after non erased frames of the encoded sound signal have been received. For that purpose, concealment / recovery parameters are determined in the encoder or decoder. When determined in the encoder (106), the concealment / recovery parameters are transmitted to the decoder (110). In the decoder, erasure frame concealment and decoder recovery is conducted in response to the concealment / recovery parameters. The concealment / recovery parameters may be selected from the group consisting of: a signal classification parameter, an energy information parameter and a phase information parameter. The determination of the concealment / recovery parameters comprises classifying the successive frames of the encoded sound signal as unvoiced, unvoiced transition, voiced transition, voiced, or onset, and this classification is determined on the basis of at least a part of the following parameters: a normalized correlation parameter, a spectral tilt parameter, a signal-to-noise ratio parameter, a pitch stability parameter, a relative frame energy parameter, and a zero crossing parameter.

In a watermarking system, an embedder embeds one of several alternative watermark patterns that represent the source message using side information to improve robustness. A detector uses normalized correlation to test all of the patterns, indicating that the source message is present if any one of the patterns is detected. The detection process results in a detection region that is the union of several disjoint cones, or a cone-forest, in media space.

A method for estimating symbol timing of a guard interval in an orthogonal frequency division multiplexing receiver of a wireless local area network comprises receiving a preamble including a plurality of short training symbols; sampling said short training symbols of said preamble at a first rate; correlating a first short training symbol with a second short training symbol that is adjacent to said first short training symbol and generating a correlation signal; normalizing said correlation signal to generate a normalized correlation signal; and calculating a mean absolute difference of said normalized correlation signal.

The invention discloses a high-speed parallel implementation method and device for template matching based on a normalized correlation coefficient. The method comprises the following steps of reading a real-time graph and template graph data in a corresponding internal RAM (random access memory) buffer block and a real-time graph data buffer RAM, and meanwhile calculating the sum of a template graph gray value and the squared sum of the template graph gray value, and calculating the sum of a real-time graph gray value and the squared sum of the real-time graph gray value at a search position (0, 0); then calculating the sum of the product of the real-time graph gray values of various columns in the first row of the search position of the following columns of the first row in the search position, and the normalized correlation coefficient; and meanwhile, further reading the real-time graph data of a new row in the corresponding internal RAM buffer block and the real-time graph data buffer RAM corresponding position, and calculating the value of the first column in the current row at the same time, and calculating the normalized correlation coefficients of following rows in sequence. The device is composed of a high-speed correlation operator, an external data result memory and a microprocessor.

An image defect inspecting apparatus of the present invention includes a template image producing section for producing a template image from reference image data, a corresponding image extracting section for extracting a predetermined image located at a position corresponding to a template image from digital data of a scanned image for inspection, data embedding sections for embedding desired same pattern data into the template image and the image extracted by the corresponding image extracting section, a normalized correlation value calculation processing unit for acquiring a normalized correlation coefficient from the template image and the extracted image, into which the pattern data is embedded, and a defect judging section for judging as to whether a defect is present by comparing the normalized correlation coefficient acquired by the normalized correlation value calculation processing unit with a predetermined threshold value so as to acquire a large / small relationship thereof.

The invention discloses a cell synchronization position, device and equipment, and belongs to the technical field of communication. The method includes the steps: respectively extracting at least one SSS (secondary synchronization signal) time domain receiving signal from at least one antenna according to each PSS (primary synchronization signal) synchronization position when detecting the same Cell ID (identity) at a plurality of PSS synchronization positions; respectively calculating normalized correlation of each pre-stored time domain SSS and the SSS time domain receiving signal at each PSS synchronization position to obtain an SSS normalized correlation value based on each PSS synchronization position; determining the PSS synchronization position corresponding to the maximum SSS normalized correlation value as the PSS synchronization position of the Cell ID. By determining the PSS synchronization position of the Cell ID, the detected PSS synchronization positions are filtered, the position detection success probability of the Cell ID is increased, interference elimination accuracy can be improved when interference is eliminated for the Cell ID, and the detection success probability of a target cell is further increased.