Tundish Cover Flux Thickness Measurement Method and Instrumentation Based on Computer Vision in Continuous Casting Tundish

Table 2

Calculated distance from TCF upper surface to camera optical center, and the comparison between calculated distance and actual distance which is manually measured.

Image coordinates before movement	Image coordinates after movement	Calculated distance (mm)	Actual distance (mm)	Deviation (mm)
(455, 220)	(450, 345)	698.6	700	−1.4
(492, 224)	(486, 348)	701.3	700	1.3
(501, 227)	(494, 351)	701.5	700	1.5
(520, 251)	(513, 374)	701.1	700	1.1
(526, 247)	(518, 370)	698.5	700	−1.5
(534, 252)	(526, 374)	700.8	700	0.8
(547, 249)	(539, 372)	700.0	700	0
(551, 248)	(542, 371)	701.8	700	1.8
(330, 277)	(335, 402)	700.9	700	0.9
(474, 239)	(468, 363)	699.1	700	−0.9
(501, 231)	(495, 355)	701.3	700	1.3
(513, 240)	(505, 362)	699.0	700	−1
(520, 246)	(513, 369)	701.4	700	1.4
(528, 254)	(521, 376)	701.8	700	1.8
(529, 260)	(522, 382)	702.2	700	2.2
(535, 255)	(527, 378)	701.1	700	1.1
(535, 259)	(527, 382)	701.0	700	1
(540, 257)	(532, 380)	701.1	700	1.1
(513, 240)	(505, 362)	698.4	700	−1.6
(501, 225)	(494, 349)	700.3	700	0.3