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A vine pruning robot uses stereo cameras to build a 3D model of vines. The robot's 3D reconstruction scheme requires the 2D structure of the vine to be extracted from each image. This paper describes how the 2D structure is extracted. We propose an image grammar-based model for how a vine generates an image. We extract cane edges from each image, then apply a bottom-up parse of the cane edges to find...
We propose a method for identifying a piano keyboard present in the video footage of a standard webcam with the goal of teaching chords, scales and suggested finger positions to a beginner pianist. Our keyboard identification method makes use of binary thresholding, Sobel operators and Hough transforms, as well as proposed algorithms specific to this application, to first find an area resembling a...
The project presents robust vision-based navigation through doorways and hallways where static objects are present. A method is proposed using the fusion of colour features, edge map, motion analysis and stereo vision to help the system interpret visual cues. The system is able to detect ground plane, drop-offs, stairs and doorways, and is able to provide motion information of the camera. The results...
In any country, roads are marked with signs. In particular, street signs are a type of road sign used to display the names of streets. Mobile devices such as smart phones are now powerful enough to serve as platforms for computer vision applications. These mobile devices are commonly equipped with high resolution cameras and increasingly with internal GPS for geolocation.We propose an accurate method...
Writing musical notation for guitar, otherwise known as tablature (or colloquially, “tab”) can be a tedious and time-consuming task when performed by hand. Software exists that can detect the pitch of a signal emitted from a musical instrument, but this is insufficient for guitar tablature which also requires spatial information. Previous vision-based methods had low accuracy rates and required the...
This paper describes a scheme for seamlessly stitching together images captured from an aerial platform, in real-time, in order to provide an operator with a larger field-of-view. Both recent images, and images from earlier in a flight are used. To obtain real-time performance several of the latest computer vision techniques are applied: firstly the Bag-of-Words image representation allows overlapping...
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