Image feature extraction method and device and electronic equipment

The invention provides an image feature extraction method and device and electronic equipment, and the method does not need to calculate the pixel gradients in a line support region one by one when determining a descriptor of a feature line segment, but determines a target number of ordered random dot pairs in a preset range for each pixel in the line support region, the binary vectors of the pixels are further determined according to the brightness of the target number of ordered random dot pairs, and finally the descriptors of the feature line segments can be obtained by carrying out related addition and product operation on the binary vectors, so that the calculation amount is small, the image feature extraction efficiency is improved, the method can be operated in real time in a low-power-consumption embedded platform, and the technical problems that an existing image feature extraction method is serious in time consumption, large in calculation amount and incapable of running in a low-power-consumption e