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Qubit State
Triqubit-state Measurement-based Image Edge Detection Algorithm
Zhonghua Wang and Faliang Huang
Page: 1331~1346, Vol. 14, No.6, 2018
10.3745/JIPS.04.0095
Keywords: Edge Detection, Partial Differential Equation, Pixel Saliency, Qubit State, Quantum Measurement
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Triqubit-state Measurement-based Image Edge Detection Algorithm
Zhonghua Wang and Faliang Huang
Page: 1331~1346, Vol. 14, No.6, 2018

Keywords: Edge Detection, Partial Differential Equation, Pixel Saliency, Qubit State, Quantum Measurement
Show / Hide Abstract
Aiming at the problem that the gradient-based edge detection operators are sensitive to the noise, causing the
pseudo edges, a triqubit-state measurement-based edge detection algorithm is presented in this paper.
Combing the image local and global structure information, the triqubit superposition states are used to
represent the pixel features, so as to locate the image edge. Our algorithm consists of three steps. Firstly, the
improved partial differential method is used to smooth the defect image. Secondly, the triqubit-state is
characterized by three elements of the pixel saliency, edge statistical characteristics and gray scale contrast to
achieve the defect image from the gray space to the quantum space mapping. Thirdly, the edge image is
outputted according to the quantum measurement, local gradient maximization and neighborhood chain
code searching. Compared with other methods, the simulation experiments indicate that our algorithm has
less pseudo edges and higher edge detection accuracy.