Model training method and device, instance segmentation method and device, equipment and medium

The embodiment of the invention relates to a model training method and device, an instance segmentation method and device, equipment and a medium. The model training method comprises the steps that a sample image is acquired; acquiring an initial label of the sample image; wherein the initial label comprises a semantic category and an instance category to which the target point belongs, each object in the sample image is marked with a target point, and the target point marked by the object is a point contained in the object; generating an extended label of the sample image based on the initial label; wherein the extension tag comprises a semantic category and an instance category to which the association point of the target point belongs, and the semantic category and the instance category to which the association point belongs are determined based on the semantic category and the instance category to which the target point belongs; and training the initial neural network model based on the initial label and