Target object detection method and device and electronic equipment

The invention discloses a target object detection method and device and electronic equipment, and relates to the technical field of computer vision. According to the method, a basic detection network is subjected to multi-round iterative training through a grid image carrying an annotation box, and a target detection network is obtained. And detecting a to-be-detected image by using the target detection network to obtain a position area of a target object in the to-be-detected image. In a model training stage, a grid image is identified by using a current network parameter to obtain a prediction frame of each grid, and a first prediction frame overlapped with a plurality of annotation frames is determined from the prediction frames according to an intersection-to-union ratio of the prediction frames and the annotation frames. And then determining an expected convergence value of the first prediction frame according to the intersection-to-sum ratio of the first prediction frame and the corresponding overlappin