37 results about "Fingerprint retrieval" patented technology

The invention discloses a video fingerprint retrieval method based on coarse and fine granularity. According to the method, a video fingerprint is subjected to retrieval comparison in different-layer and different granularity retrieving mode. A local sensitive Hash algorithm is used for carrying out Hash processing on all video fingerprints in a video fingerprint database and the video fingerprint to be retrieved, so that the video fingerprint most similar to the video fingerprint to be retrieved is found, and the coarse granularity finding is completed, and the preparation is made for effectively reducing the time expenditure of the video retrieval; during the fine granularity finding, through the fast video fingerprint matching mechanism improved based on a biological sequence comparison technology BLAST, whether the video fingerprint to be retrieved exists in the video fingerprint database or not is fast found, the video segment matching finding can also be carried out, and in addition, the affiliated complete videos of the video segments to be retrieved and the concrete occurring time positions of the video segments to be retrieved in the complete videos can be determined according to the features of the video fingerprint, so that the accuracy and the real-time performance of the video finding are ensured.

The invention discloses an audio fingerprint retrieval method and a retrieval device. The audio fingerprint retrieval method includes the steps of carrying out framing process to audio signals of an audio clip, determining key frames in each subframe obtained through the framing processing by means of an onset detection function (ODF) method, obtaining audio fingerprints of the key frames, carrying out retrieval according to the obtained audio fingerprints, and obtaining audio file information corresponding to the audio clip. Correspondingly, the invention further discloses an audio fingerprint storage method and a storage device. The audio fingerprint storage method and the storage device can greatly reduce wasted memory due to audio retrieval, greatly reduce wasted time due to the audio retrieval, and improve retrieval efficiency on the premise of ensuring accuracy rate of audio fingerprint retrieval.

Methods are provided for both single modal and multimodal fault diagnosis. In a method, a fault fingerprint is constructed based on a fault event using an invariant model. A similarity matrix between the fault fingerprint and one or more historical representative fingerprints are derived using dynamic time warping and at least one convolution. A feature vector in a feature subspace for the fault fingerprint is generated. The feature vector includes at least one status of at least one system component during the fault event. A corrective action correlated to the fault fingerprint is determined. The corrective action is initiated on a hardware device to mitigate expected harm to at least one item selected from the group consisting of the hardware device, another hardware device related to the hardware device, and a person related to the hardware device.

The invention provides a fingerprint retrieval method based on the global direction information. The fingerprint retrieval method comprises the following steps: A, establishing a fingerprint global direction information feature representation model; B, extracting the global direction information of the fingerprint database and the input fingerprint image, using the global direction information feature to represent the model to construct the feature vector, and then performing searching. The method can improve the utilization rate of fingerprint information and the fingerprint retrieval efficiency.

The invention discloses a massive digital audio fingerprint storage and retrieval method, which comprises two steps of digital audio fingerprint storage and digital audio fingerprint retrieval, and the digital audio fingerprint storage comprises the following steps of: performing Hash processing on an audio file to be stored to obtain a unique identifier of each audio file; extracting audio fingerprints of the audio files to be stored, wherein the audio fingerprint of each audio file forms a character string; taking an identifier obtained after Hash of each to-be-processed audio file as a Rowkey of the Hbase, taking the fingerprint character string as a value of one column, taking meta information as a value of the other column, writing the values into a table of the Hbase, and writing thevalues into the Hbase; and taking identifier and fingerprint character string obtained after Hash of each audio file to be processed as two fields of document corresponding to audio file to be processed, and writing two fields into ES. Near-real-time full-text search and distributed characteristics of ES are utilized, and concurrent and real-time query is supported while high-efficiency query isguaranteed.

The invention discloses a video fingerprint extraction and retrieval method, which is used for extracting the texture information from an image sequence in a video, so as to obtain the marking information indicating the difference of the video from other videos. The video fingerprint extraction method comprises the following steps: the video is decoded to obtain YUV data of each image; the Y component of each image is extracted, the gradient information of the Y component is extracted through the Sobel operator, and the first 10 percent of points with the maximum gradient range in the horizontal (X) direction and the first 10 percent of points with the maximum gradient range in the vertical (Y) direction are respectively reserved; each video frame image is divided into N*N areas, the gradient distributions in the forward and the backward X directions as well as in the forward and the backward Y directions in each area are obtained through statistics, and the gradient distributions in all the areas are combined to form a normalized column diagram. The video fingerprint retrieval method comprises the following steps: a fingerprint sequence of a template video is slide on a fingerprint sequence of a video to be inquired about, and a cross correlation coefficient is calculated to find out a matching position with the maximum similarity. The invention can greatly simplify the video contents, and effectively improve the video retrieval efficiency.

The invention discloses a system and a method for retrieving contents of an audio/video. The method at least comprises the following steps of: receiving an audio/video segment; extracting the fingerprint characteristic of each frame of the audio/video segment; computing the anti-interference degree of a fingerprint of each frame by using an anti-interference degree computation model; sorting the frames according to the anti-interference degree of the fingerprint of each frame; and retrieving the fingerprints in a fingerprint database according to a frame sorting result. The fingerprint retrieval speed of the audio/video is greatly improved by computing the anti-interference degree of the fingerprint characteristic of each frame, sorting according to the anti-interference degree of the fingerprint characteristic of each frame and retrieving.

A retrieval method includes obtaining an audio sub-fingerprint to be retrieved, obtaining an audio sub-fingerprint to be retrieved, and retrieving the audio sub-fingerprint. According to the audio sub-fingerprint, reading an inverted item head address recorded in an index entry corresponding to the audio sub-fingerprint in a pre-generated address index table; Reading an inverted item entry corresponding to the audio sub-fingerprint in a pre-generated inverted table according to the inverted item head address, and obtaining each audio identifier ID recorded under the entry; According to the audio identifier ID, by a pre-generated audio identifier ID-Audio fingerprint database address mapping table, obtains the audio fingerprint file corresponding to each audio identifier ID in the audio fingerprint database storage address. The audio sub-fingerprint retrieval method provided by the present application draws on the inverted table method in text retrieval, and can quickly obtain the audioidentifier ID containing the audio sub-fingerprint. The present application also provides a retrieval method for identifying audio files and an audio inquiry system.

The invention relates to a parallel video fingerprint retrieval method which comprises the following steps of: (1) video fingerprint extraction step: carrying out video fingerprint coding on video files uploaded by users in a video database to extract video file fingerprints; (2) video file fingerprint packaging step: dividing the video file fingerprints into a plurality of video fingerprint packages according to a time sequence during uploading by the user, and distributing the plurality of video fingerprint packages to a plurality of computers calculating in parallel; (3) parallel retrieval step: carrying out parallel calculation retrievals in the computers with the video fingerprint packages within corresponding time periods according to the video fingerprints and appointed time periods of the video files to be retrieved; and (4) summarizing parallel calculation retrieval results. In the invention, the audio and video file fingerprints are packaged according to the time sequence and transmitted to the computers calculating in parallel to carry out the retrievals on the videos and the video fingerprints, thereby reducing unnecessary calculated amount and greatly improving the speed and the efficiency of fingerprint retrievals.

The invention relates to a fingerprint feature expression technology and a fingerprint retrieval technology, and provides a fingerprint database quick retrieval method based on a core detail point support system. And the core detail point support system obtains each detail point of the fingerprint image one by one as a core detail point, the detail points except the core detail points are used assupport detail points, and the core detail points and the support detail points form the core detail point support system. And the support detail point feature vector is enabled to correspond to the core detail point and the fingerprint template ID by using a hash table. And during retrieval, the hash table is searched by using the support detail points, the ID of the core detail point with the highest occurrence frequency is counted, the ID frequency of the fingerprint template in the matched detail points is counted, and the most similar fingerprint template is found. According to the method, a two-dimensional feature vector is constructed, the size of a hash table is reduced, and the space complexity is reduced; the constructed feature vectors contain more fingerprint image information,the total number of the feature vectors converted from the fingerprint images is small, the hash table addressing frequency during retrieval is reduced, and the retrieval time complexity is reduced.

The invention provides a high-resolution fingerprint retrieval method based on sweat pores and multi-graph matching. The high-resolution fingerprint retrieval method sequentially comprises the following steps: a high-resolution fingerprint registration step: establishing and calculating a binary feature vector of registered sweat pores extracted from registered fingerprints of a registration library; a sweat pore retrieval step: establishing and calculating a binary feature vector of a test sweat pore extracted from the test fingerprint; a multi-graph matching step: extracting required nearestneighbor training sweat pores for each test sweat pore, and removing wrong nearest neighbor training sweat pores by adopting a multi-graph matching algorithm in combination with the spatial distribution relationship of the test sweat pores; and an output step: finally recommending a candidate fingerprint sequence according to a result of the sweat pore retrieval step. The high-resolution fingerprint retrieval method disclosed by the invention has the beneficial effects that retrieval is carried out through the sweat pore local characteristics in the fingerprint, and as sweat pores are richerthan other characteristics, the high-resolution fingerprint retrieval method can effectively improve the fingerprint retrieval precision.

The invention discloses an audio fingerprint retrieval library updating method and device, equipment and a medium, and the method comprises the steps: obtaining a target song ID from a to-be-extracted feature queue when it is monitored that the to-be-extracted feature queue is non-empty; performing feature extraction on the to-be-processed audio data corresponding to the target song ID to obtain target audio feature data; storing the target song ID into a to-be-inserted fingerprint queue, and storing the target audio feature data into a preset storage area according to the target song ID; when it is monitored that the to-be-inserted fingerprint queue is non-empty, obtaining an earliest stored target song ID from the to-be-inserted fingerprint queue; encoding target audio feature data corresponding to the earliest stored target song ID to obtain a corresponding target audio fingerprint; and sending the target audio fingerprint to a target online server, so that the target online server inserts the target audio fingerprint into an audio fingerprint retrieval library. In this way, the audio fingerprint retrieval library can be updated in real time.

The invention discloses an audio fingerprint retrieval method, device and equipment. The method comprises the following steps that: acquiring audio information input into a retrieval engine of an audio fingerprint platform, extracting audio features of the audio information, retrieving audio fingerprint retrieval results of a plurality of audio fingerprints matched with the audio features on the audio fingerprint platform, and displaying the audio fingerprint retrieval results of the plurality of audio fingerprints according to a correlation degree sequence. In this way, the audio fingerprintretrieval results of the multiple audio fingerprints associated with the audio features corresponding to the audio information input into the retrieval engine of the audio fingerprint platform can beobtained through retrieval.