An Improved Canny-Zernike Subpixel Detection Algorithm

Table 1

Pixel-level and subpixel-level edge positioning accuracy comparison.

Actual coordinates		Canny detection coordinates		Subpixel detection coordinates
1331.5	1469.5	1331	1469	1331.4728	1469.4742
1331.5	1470.5	1331	1469	1131.3810	1469.3753
1331.5	1471.5	1331	1471	1331.4399	1469.4228
1331.5	1472.5	1331	1473	1331.3911	1469.4003
1331.5	1473.5	1331	1473	1311.3323	1469.4010
1331.5	1474.5	1331	1474	1311.3537	1469.3326