Image enhancement method, chip and image acquisition device

An image enhancement method, applied to an image enhancement chip comprising a main processor, a first neural network processor and an on-chip memory;

• wherein the method comprises:
• storing, by the main processor, a preset number of Raw image frames to be processed currently in a first off-chip memory, into the on-chip memory;
• wherein the Raw image frames in the first off-chip memory are acquired from a sensor;
• acquiring, by the main processor, a preset black frame image from a second off-chip memory and storing the preset black frame image into the on-chip memory;
• pre-processing, by the main processor, the preset number of Raw image frames to be processed currently in the on-chip memory based on the preset black frame image in the on-chip memory, respectively, to obtain a preset number of Raw image frames to be fused currently, and storing the preset number of Raw image frames to be fused currently into the on-chip memory;
• performing, by the first neural network processor, image fusion on the preset number of Raw image frames to be fused currently in the on-chip memory based on a preset image fusion network, to obtain a fused Raw image frame, and storing the fused Raw image frame into the on-chip memory;
• wherein the preset number of Raw image frames to be fused currently are obtained based on the preset number of Raw image frames to be processed currently;
• and
• sending, by the main processor to an image signal processor (ISP) chip, a target Raw image frame to be sent currently;
• wherein the target Raw image frame is obtained based on the fused Raw image frame in the on-chip memory.