Object detection using image processing techniques: coconut as a case study
The use of computers to analyze images has many potential but, the variability of the objects makes it a challenging task. In this thesis, the main idea is to detect an object (coconut) from an image. Several techniques have been utilized namely, the separable filter, Circular Hough Transform (CH...
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| Format: | Thesis |
| Language: | English |
| Subjects: | |
| Online Access: | http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/63410/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/63410/2/Full%20text.pdf |
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| Summary: | The use of computers to analyze images has many potential but, the variability of the
objects makes it a challenging task. In this thesis, the main idea is to detect an object
(coconut) from an image. Several techniques have been utilized namely, the separable
filter, Circular Hough Transform (CHT), chord intersection and moment invariant.
Before applying these techniques, the preprocessing and image segmentation steps need to be performed in priori. Histogram equalization is utilized in preprocessing step
meanwhile edge detection and morphological filtering have been employed in image
segmentation step. Single object has been experimented to evaluate the two (2)
techniques, CHT and the chord intersection. Based on the results obtained from single
object detection, the CRT achieves higher percentage, 87.5% than chord intersection
technique, 85%. For multiple objects detection, the CHT technique has been used and
the highest detection for the first object is 87.5% followed by 92.5% for the second
object, 77.5% for the third object and the last object is 67.5%. The moment invariant
technique has been used to extract the shape of the object and detect its presence. From
50 images that have been experimented, 90% show positive result. This research can be
adopted for climbing robotic system that can automatically pluck the coconut from a
tree. Using image processing techniques, the gripping process will be easier and
convenient than manual plucking. |
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