FPGA-Accelerated Visual Inspection: How We Cut Latency from 200ms to 8µs

Mon, 20 Jul 2026 00:00:00 +0000

1. The Problem: Software-Based Visual Inspection Hits a Wall

In Tainuo’s PCB printing pipeline, one of the most critical steps is real-time solder-paste inspection. Each board passing through the production line has less than 50ms total for defect detection — any slower and the line stalls.

For years we ran a GPU-accelerated OpenCV pipeline on an x86 edge node. It worked — mostly. But under peak load with high-resolution 8K images, the pipeline occasionally hit 180–220ms per frame. That 180ms of jitter meant missed defects, false passes, and production-line backpressure. The root cause was architectural: a general-purpose GPU pipeline, no matter how optimized, introduces unpredictable scheduling latency and PCIe transfer overhead.

Verilog on TiJet

FPGA-Accelerated Visual Inspection: How We Cut Latency from 200ms to 8µs

1. The Problem: Software-Based Visual Inspection Hits a Wall