Automatic optical inspection device based on CPU+GPU+FPGA architecture

A device, comprising:

• 1) an image storage unit;
• 2) an image computing unit;
• and
• 3) an image acquisition unit;
• wherein:
• the image storage unit comprises a first communication interface and a second communication interface;
• the image computing unit comprises a first optical interface, a second optical interface, a third optical interface, and a fourth optical interface;
• the image acquisition unit comprises a third communication interface and a camera interface;
• the image storage unit is configured to transmit configuration parameters and test commands to the image computing unit, receive a test result transmitted from the image computing unit via the first communication interface, and receive data from the image acquisition unit via the second communication interface;
• the image computing unit is configured to receive the configuration parameters and test commands from the image storage unit, and transmit the test result to the image storage unit via the first fiber interface, to receive the data from the image acquisition unit and transmit the configuration parameters and test commands to the image acquisition unit via the second fiber interface, to control the generation of a screen lighting signal via the third fiber interface, and to control an input/output (IO) light source via the fourth fiber interface;
• the image computing unit comprises a field-programmable gate array (FPGA) computing platform and a personal computer (PC);
• the image computing unit communicates and exchanges data with the PC, the image storage unit, and the image acquisition unit via fibers;
• the FPGA computing platform is a FPGA-based calculation processing board configured to accelerate image preprocessing;
• the PC comprises a central processing unit (CPU) and a graphics processing unit (GPU) for image postprocessing;
• and
• the image acquisition unit is configured to output image data, the configuration parameters, and the test commands via the third communication interface, and to receive camera data and transmit the configuration parameters and the test commands to a camera via the camera interface.