A training method and application of a head and shoulder image classifier
An image classifier and training method technology, which is applied in the fields of instrument, calculation, character and pattern recognition, etc., can solve the problem of low head and shoulders detection ability, improve the ability of head and shoulders detection, avoid poor adaptability, and achieve reliable recognition results. Effect
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Embodiment 1
[0052] A training method 100 of a head and shoulders image classifier, such as figure 1 shown, including:
[0053] Step 110, obtaining a human body posture data set, which includes a plurality of human body sample pictures and human body head and shoulder annotation data corresponding to each human body sample picture;
[0054] Step 120, through the multi-core parallel algorithm and single instruction multiple data flow instruction set, synchronously calculate multiple human body sample pictures, and obtain the aggregation channel feature map corresponding to each human body sample picture and the multiple down-sampling corresponding to the aggregation channel feature map Aggregate channel feature maps;
[0055] Step 130: Determine the positive detection window group and its corresponding positive feature vector group and the negative detection window group and its corresponding negative feature vector group based on all aggregated channel feature maps and downsampled aggrega...
Embodiment 2
[0063] On the basis of Embodiment 1, the plurality of human body sample pictures include: human body sample pictures of various postures and multiple perspectives.
[0064] This embodiment aims at the problems that template matching and other methods based on artificial image features in the prior art are difficult to detect occluded human bodies, and it is difficult to adapt to changes in color and outline shape. A human head and shoulders data set containing multi-pose and multi-view human body images is used as training data , to avoid the poor adaptability of the detection method due to a single data source.
Embodiment 3
[0066] On the basis of Embodiment 1 or Embodiment 2, each aggregation channel feature map and each downsampling aggregation channel feature map include ten feature channels;
[0067] Then step 120 includes:
[0068] Through the multi-core parallel algorithm, multiple human body sample pictures are calculated synchronously, and the aggregation channel feature map corresponding to each human body sample picture and the multiple down-sampled aggregation channel feature maps corresponding to the aggregation channel feature map are obtained. When channel feature maps and each down-sampled aggregation channel feature map, the above ten feature channels are calculated using SIMD instruction set.
[0069] The multi-core parallel algorithm is used to calculate the feature map, and the single instruction multiple data stream instruction set is used to calculate the feature channel of the feature map, which greatly improves the speed of data processing in the case of a large amount of da...
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