Image enhancement model training method, PCB component detection method and device

The invention discloses a training method of an image enhancement model and a PCB component detection method and device.The training method comprises the steps that multiple original images with annotation information are obtained, each original image is preprocessed to obtain a preprocessed image, and the original images comprise multiple different types of components; component image matting is carried out on each preprocessed image according to the annotation information to obtain a training image, and when component image matting is carried out, redundant background images around components are matted according to a preset external expansion proportion; component image matting is carried out on each preprocessed image according to the annotation information to obtain a target image, and the target image does not have redundant background images; and the training images and the target images which are in one-to-one correspondence are zoomed according to the preset resolution and then are input into the dee