Method and device for extracting image

The embodiment of the invention discloses a method and a device for extracting an image. One embodiment of the method comprises the steps: a reference object image and a set of images to be matched are acquired; the reference object image is inputted into the first sub-network included in the pre-trained image recognition model and the feature vector of the reference object image is obtained as the reference feature vector; as for the images to be matched in the set of images to be matched, the following extraction steps are performed: the images to be matched are inputted into the second sub-network included in the image recognition model so as to obtain at least one position information and the feature vector to be matched corresponding to the position information; the distance between the obtained feature vector to be matched and the reference feature vector is determined; and the images to be matched are extracted as the images matching the reference object image in response to determining that there is t