Retrieval method of food safety traceability system based on shot sample retrieval
A food safety and traceability system technology, applied in the field of food safety traceability system retrieval, can solve the problems of ignoring the timing relationship and correlation of key frames, inaccurate retrieval accuracy, and long time consumption, so as to reduce the time required for retrieval and improve the efficiency of retrieval. The effect of retrieval accuracy and good timing
Inactive Publication Date: 2018-12-18
龙口盛福达食品有限公司
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Existing video retrieval ignores the timing relationship and correlation between key frames, the retrieval accuracy is not accurate enough, and it takes a long time
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[0029] refer to figure 1 , the method of the present invention comprises the following steps:
[0030] A. Obtain the food scene that needs to be retrieved, divide the shot to extract key frames, and form a feature space that can fully reflect the content of the shot according to the set of feature points of the key frames;
[0031] (1) Obtain the food shot image that needs to be retrieved, split the shot to extract key frames, find out the boundary between two consecutive shots by detecting the shot switching point, and gather the frames belonging to the same shot together. The collection of feature points in , forms a feature space that can fully reflect the content of the shot.
[0032] (2) Select two key frames to represent the main content of the shot, two key frames F a , F b Corresponding to two feature points f a , f b , have
[0033]
[0034] where d is the dimension of the feature space. The similarity between two frames is measured by Euclidean distance: ...
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The invention discloses a food safety traceability system retrieval method based on shot sample retrieval, which mainly comprises the following steps: A. obtaining a food shot picture to be retrieved,dividing the shot to extract a key frame, and forming a feature space capable of fully reflecting the content of the shot according to the feature point set of the key frame; B. connecting the characteristic points to form a curve, performing linear approximation on the curve, and determining the best approximation of the inverse curved point as a key frame; C. determining the distance between the retrieved image and all feature line in the sample shot through the threshold value of the feature point connection, and sorting the feature lines to obtain the most similar shot, and completing theretrieval of the food safety traceability system. The method has good temporality, generality and correlation, and improves the retrieval precision, reduces the complexity and reduces the retrieval time by approximating and extracting key frames combined with spatial distance.
Description
technical field [0001] The invention relates to a retrieval method for a food safety traceability system, belonging to the fields of food safety, video retrieval and differential geometry. Background technique [0002] In recent years, due to the frequent occurrence of food safety crises, which have seriously affected people's health and aroused widespread concern around the world, how to effectively track and trace food has become an extremely urgent global issue. The food safety traceability system can connect all links of production, inspection, supervision and consumption, so that consumers can understand the production and circulation process that conforms to hygienic safety. The system provides a "from farm to table" traceability model, extracts public traceability elements that consumers care about in supply chain links such as production, processing, circulation, and consumption, and establishes a food safety information database. Once a problem is found, it can be r...
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IPC IPC(8): G06Q30/00G06F17/30
CPCG06Q30/018
Inventor 杨迎霞
Owner 龙口盛福达食品有限公司