A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw,...
-
Upload
jesse-dickerson -
Category
Documents
-
view
214 -
download
0
Transcript of A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw,...
![Page 1: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/1.jpg)
A Simple Optical Dendrometer based on a Digital Camera and
Visible Laser Pointer
John A. Kershaw, Jr.Western Mensurationists Meeting
Vancouver, WA
June 21-23, 2009
(The Art of Kamera Sutra)
![Page 2: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/2.jpg)
Panoramic Tripod MountPanoramic Tripod Mount
![Page 3: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/3.jpg)
Stitching ProcessStitching Process
• Used software called panorama factory– http://www.panoramafactory.com/
• Automates the process• Corrects geometrical lens errors
![Page 4: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/4.jpg)
Panoramic Photo PlotsPanoramic Photo Plots
![Page 5: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/5.jpg)
Enhanced Photo PointsEnhanced Photo Points
• Tagged trees– Indexes trees in the image– Width of the tag is a constant
• ARTaghttp://www.cv.iit.nrc.ca/
research/ar/artag/
![Page 6: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/6.jpg)
Previous commentsPrevious comments
• If you have to “tag” each tree, why not simply measure it?
• Seems to be substituting office time for field time?
![Page 7: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/7.jpg)
NSERC Discovery GrantNSERC Discovery Grant• Go from “off-the-shelf” technology to
dedicated camera-field data collector system• Explore advantages/disadvantages of tagging
system and possible alternatives– Stereo Panoramic Photos– 360/180 hemisphere photos– Image Segmentation– Hidden Tree Identification
• Nagging problem of determining scale with a vanishing point horizon
![Page 8: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/8.jpg)
Stereo PanoramasStereo Panoramas
![Page 9: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/9.jpg)
360/180 Panoramas360/180 Panoramas (Mercator Projection) (Mercator Projection)
![Page 10: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/10.jpg)
An innocent startAn innocent start
![Page 11: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/11.jpg)
![Page 12: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/12.jpg)
![Page 13: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/13.jpg)
![Page 14: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/14.jpg)
![Page 15: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/15.jpg)
A Distance functionA Distance function
![Page 16: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/16.jpg)
Too Sensitive to Camera PlaneToo Sensitive to Camera Plane
![Page 17: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/17.jpg)
Dual Laser SetupDual Laser Setup
![Page 18: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/18.jpg)
Canon SD430 – 5.0MP
Canon SD990 – 15.0MP
Canon 5D – 22.0MP
![Page 19: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/19.jpg)
![Page 20: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/20.jpg)
A New Distance FunctionA New Distance Function
![Page 21: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/21.jpg)
DBH Resolution (cm/pixel)DBH Resolution (cm/pixel)
![Page 22: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/22.jpg)
Quick Test on 4 Trees by 5 DistancesQuick Test on 4 Trees by 5 Distances(Canon 5D)(Canon 5D)
Predicted Distance vs Observed Distance Predicted DBH versus Observed DBH
![Page 23: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/23.jpg)
Upper Stem DiametersUpper Stem Diameters
![Page 24: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/24.jpg)
Automating the Process (100% laser)Automating the Process (100% laser)
![Page 25: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/25.jpg)
Automating the Process (20% laser)Automating the Process (20% laser)
![Page 26: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/26.jpg)
Full Panorama PlotFull Panorama Plot
![Page 27: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/27.jpg)
Next StepsNext Steps
• Stabilize Laser Mounts• Test on Upper Stem Diameters• Automate Process• Build Image Analysis System on SD990
![Page 28: A Simple Optical Dendrometer based on a Digital Camera and Visible Laser Pointer John A. Kershaw, Jr. Western Mensurationists Meeting Vancouver, WA June.](https://reader035.fdocuments.in/reader035/viewer/2022062518/56649ea45503460f94ba8a77/html5/thumbnails/28.jpg)
Questions?Questions?