Image segmentation method and apparatus, diagnosis system, storage medium, and computer device

An image segmentation apparatus, comprising:

• a memory storing computer program instructions;
• and a processor coupled to the memory and configured to executing the computer program instructions and perform:
• obtaining a general tumor image;
• performing tumor localization on the tumor image to obtain a candidate image indicating a position of a tumor region in the general tumor image;
• inputting the candidate image to a cascaded segmentation network constructed based on a machine learning model;
• and
• performing image segmentation on the general tumor region in the candidate image using a first-level segmentation network and a second-level segmentation network in the cascaded segmentation network to obtain a segmented image.

A non-transitory computer-readable storage medium storing computer program instructions executable by at least one processor to perform:

• obtaining a general tumor image;
• performing tumor localization on the tumor image to obtain a candidate image indicating a position of a tumor region in the general tumor image;
• inputting the candidate image to a cascaded segmentation network constructed based on a machine learning model;
• and
• performing image segmentation on the general tumor region in the candidate image using a first-level segmentation network and a second-level segmentation network in the cascaded segmentation network to obtain a segmented image.