Abstract
Ghost imaging is a novel imaging method, which enables imaging under harsh environments or quickly extracting image information. The advantage of Ghost imaging in edge detection is that it can directly obtain the edge information of an unknown target. We propose an edge detection method based on two dimensional (2D) discrete cosine transform (DCT) - frequency domain filtering ghost imaging (FDFGI). This method combines the frequency-domain filtering and anisotropic gradient operator to extract the edge information of the unknown object under the under-sampling rate. Compared with traditional methods, this method has a higher signal-to-noise ratio of image edge information extracted under Gaussian noise. It can even achieve edge information extraction under an extremely low sampling rate of about 1.12%.
Original language | English |
---|---|
Article number | 122063 |
Journal | Journal of Physics: Conference Series |
Volume | 2478 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2023 |
Event | 3rd International Conference on Defence Technology, ICDT 2022 - Changsha, China Duration: 22 Aug 2022 → 26 Aug 2022 |
Keywords
- discrete cosine transform
- edge detection
- frequency domain filtering
- ghost imaging
- under-sampling