Monocular Vision Ranging and Camera Focal Length Calibration

Table 2

Focal length calibration results.

/mm	d/mm	Before E (d)/%	After E (d)/%
4.60894033416042	10008.6964887034	0.003032	0.22004
4.54340989429504	10273.5575694457	0.005428	0.218179
4.26951768094114	11288.3317364075	0.014776	0.169679
4.13041136577056	11826.6123375319	0.013635	0.181646
4.20616526188184	13501.3705794102	0.041678	0.033825
4.21897294335602	12752.3800233027	0.065757	0.136777
4.116390711837	13557.3146909214	0.100842	0.064484
3.97931880894754	16655.5185071925	0.623398	0.239009
3.97525839762631	17059.1622131422	0.709382	0.497604
3.94269561616738	17346.5256637998	0.117892	0.30663
4.01820166494699	15449.9426832249	0.233182	0.148455
3.9737624793774	18466.0377275484	0.242895	0.427274
3.9450206644398	19073.8011347716	0.209105	0.045672
3.93673296545302	18425.9136618791	0.098061	0.29088