Automated optical inspection system for digital TV sets

EURASIP Journal on Advances in Signal Processing

Table 6 Execution times of algorithm steps in the three versions of the system for the HDMI2 test example

Execution times on HDMI2 test example (in seconds)
Number	Step	Regular camera + PC	DSP camera + PC	DSP camera optimized
1	Test preparation	4.794	4.227	5.402
2	Image capture	8.593	2.035	1.997
3	TV screen extraction	6.271	6.271	3.940
4	Image comparison	0.514	0.514	0.333
	Total	20.172	13.047	11.672

This table summarizes the execution times of several algorithm steps in three versions of the system for the HDMI2 test example. The bottleneck of the system is the TV screen extraction which execution time was significantly reduced in the DSP-based optimized version where the extraction is no longer the bottleneck. The time for image capture was also significantly reduced in the optimized version because the image is not transferred to the PC.