Introduction
Mark points design
Tab.1 Parameters of color-coded mark points |
point | values of RGB | example | point | values of RGB | example |
---|---|---|---|---|---|
type 1 | 0 255 0 | <InlineMediaObject OutputMedium="Online"><ImageObject FileRef="images\hcm0000470534.jpg" ScaleToFitWidth="" ScaleToFit="1"/></InlineMediaObject><InlineMediaObject OutputMedium="All"><ImageObject FileRef="images\hcm0000470533.tif" Format="TIFF" OrigFileRef="foe-12028-gz-tb1fig1.tif" ScaleToFitHeight="27.0pt" ScaleToFitWidth="" ScaleToFit="1"/></InlineMediaObject> | type 3 | 0 255 255 | <InlineMediaObject OutputMedium="Online"><ImageObject FileRef="images\hcm0000470532.jpg" ScaleToFitWidth="" ScaleToFit="1"/></InlineMediaObject><InlineMediaObject OutputMedium="All"><ImageObject FileRef="images\hcm0000470531.tif" Format="TIFF" OrigFileRef="foe-12028-gz-tb1fig3.tif" ScaleToFitHeight="24.255pt" ScaleToFitWidth="" ScaleToFit="1"/></InlineMediaObject> |
type 2 | 0 0 255 | <InlineMediaObject OutputMedium="Online"><ImageObject FileRef="images\hcm0000470570.jpg" ScaleToFitWidth="" ScaleToFit="1"/></InlineMediaObject><InlineMediaObject OutputMedium="All"><ImageObject FileRef="images\hcm0000470569.tif" Format="TIFF" OrigFileRef="foe-12028-gz-tb1fig1.tif" ScaleToFitHeight="24.255pt" ScaleToFitWidth="" ScaleToFit="1"/></InlineMediaObject> | type 4 | 255 0 255 | <InlineMediaObject OutputMedium="Online"><ImageObject FileRef="images\hcm0000470568.jpg" ScaleToFitWidth="" ScaleToFit="1"/></InlineMediaObject><InlineMediaObject OutputMedium="All"><ImageObject FileRef="images\hcm0000470567.tif" Format="TIFF" OrigFileRef="foe-12028-gz-tb1fig4.tif" ScaleToFitHeight="26.5125pt" ScaleToFitWidth="" ScaleToFit="1"/></InlineMediaObject> |
Actual size: 5.0 mm |
Mark point detection and image fusion
Image preprocessing
Quasi-ellipse mark points detection
Point cloud data fusion
Experimental result and evaluation
Tab.2 Detected corresponding mark points in each perspective |
perspective 1 | perspective 2 |
---|---|
(565,263,233) | (454,262,151) |
(566,286,238) | (454,285,163) |
(617,363,204) | (502,362,192) |
(643,356,169) | (539,355,208) |
(575,477,191) | (473,473,140) |
(550,481,207) | (419,383,42) |
Tab.3 Comparison of mark point coordinates before and after transformation |
perspective 1 | perspective 2 before transformation | perspective 2 after transformation | transforming error/% |
---|---|---|---|
(565,263,233) | (454,262,151) | (558.7992,267.7609,234.4135) | 1.1167 |
(566,286,238) | (454,285,163) | (571.3145,289.9258,236.5492) | 1.1067 |
(617,363,204) | (502,362,192) | (612.2411,371.3796,209.5037) | 2.1167 |
(643,356,169) | (539,355,208) | (646.4414,348.9348,176.1394) | 2.1167 |
(575,477,191) | (473,473,140) | (576.1719,490.5505,196.7524) | 1.8500 |
(550,481,207) | (419,383,42) | (542.5946,484.5465,208.3486) | 0.7867 |