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Non-destructive automatic leaf area measurements by combining stereo and time-of-flight images
by
Polder, Gerrit
, Glasbey, Chris A
, van der Heijden, Gerie W.A.M
, Song, Yu
in
automatic leaf detection
/ Automation
/ camera position
/ Cameras
/ depth information transformation
/ Estimating
/ global optimisation strategy
/ greenhouse environment
/ greenhouses
/ Image detection
/ image disparity
/ image resolution
/ image sensors
/ nondestructive automatic leaf area measurement
/ optimisation
/ pepper
/ plants
/ Preserves
/ root-mean-square error
/ Searching
/ set
/ shape
/ smoothing method
/ smoothing methods
/ State of the art
/ stereo image processing
/ stereo imaging
/ surface area measurement
/ surface topography measurement
/ time-of-flight imaging
/ ToF imaging
/ yield
2014
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Non-destructive automatic leaf area measurements by combining stereo and time-of-flight images
by
Polder, Gerrit
, Glasbey, Chris A
, van der Heijden, Gerie W.A.M
, Song, Yu
in
automatic leaf detection
/ Automation
/ camera position
/ Cameras
/ depth information transformation
/ Estimating
/ global optimisation strategy
/ greenhouse environment
/ greenhouses
/ Image detection
/ image disparity
/ image resolution
/ image sensors
/ nondestructive automatic leaf area measurement
/ optimisation
/ pepper
/ plants
/ Preserves
/ root-mean-square error
/ Searching
/ set
/ shape
/ smoothing method
/ smoothing methods
/ State of the art
/ stereo image processing
/ stereo imaging
/ surface area measurement
/ surface topography measurement
/ time-of-flight imaging
/ ToF imaging
/ yield
2014
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![Non-destructive automatic leaf area measurements by combining stereo and time-of-flight images](https://www.mbrl.ae/o/mbrl-theme/images/site-assets/generic/no-book-image.png)
Non-destructive automatic leaf area measurements by combining stereo and time-of-flight images
by
Polder, Gerrit
, Glasbey, Chris A
, van der Heijden, Gerie W.A.M
, Song, Yu
in
automatic leaf detection
/ Automation
/ camera position
/ Cameras
/ depth information transformation
/ Estimating
/ global optimisation strategy
/ greenhouse environment
/ greenhouses
/ Image detection
/ image disparity
/ image resolution
/ image sensors
/ nondestructive automatic leaf area measurement
/ optimisation
/ pepper
/ plants
/ Preserves
/ root-mean-square error
/ Searching
/ set
/ shape
/ smoothing method
/ smoothing methods
/ State of the art
/ stereo image processing
/ stereo imaging
/ surface area measurement
/ surface topography measurement
/ time-of-flight imaging
/ ToF imaging
/ yield
2014
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Non-destructive automatic leaf area measurements by combining stereo and time-of-flight images
![Non-destructive automatic leaf area measurements by combining stereo and time-of-flight images](https://syndetics.com/index.aspx?isbn=/mc.gif&issn=1751-9632&client=MBRL&type=mbrl)
Journal Article
Non-destructive automatic leaf area measurements by combining stereo and time-of-flight images
2014
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Overview
Leaf area measurements are commonly obtained by destructive and laborious practice. This study shows how stereo and time-of-flight (ToF) images can be combined for non-destructive automatic leaf area measurements. The authors focus on some challenging plant images captured in a greenhouse environment, and show that even the state-of-the-art stereo methods produce unsatisfactory results. By transforming depth information in a ToF image to a localised search range for dense stereo, a global optimisation strategy is adopted for producing smooth results that preserve discontinuity. They also use edges of colour and disparity images for automatic leaf detection and develop a smoothing method necessary for accurately estimating surface area. In addition to show that combining stereo and ToF images gives superior qualitative and quantitative results, 149 automatic measurements on leaf area using the authors system in a validation trial have a correlation of 0.97 with true values and the root-mean-square error is 10.97 cm2, which is 9.3% of the average leaf area. Their approach could potentially be applied for combining other modalities of images with large difference in image resolutions and camera positions.
Publisher
The Institution of Engineering and Technology,John Wiley & Sons, Inc,Wiley
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