Affiliation:
1. Chongqing Electric Power Research Institute
Abstract
One method is proposed to remove the random noise and low-frequency coherent noise in the images of the optic 4f system, which is based on fusion of multiple spatial frequency spectrum images. The multiple spatial frequency spectrum images of once experiment are captured based on the image copying character from the lattice structure of spatial light modulators, which contains the same useful image information and noise with the similar distribution but different values. The random noise and coherent noise in these images are removed by combining it utilizing image fusion technique, which is similar to cumulative mean in time domain. The theoretical analysis and physical experiment suggests that the method is able to remove random noise and low-frequency coherent noise effectively and reserve the useful image information.
Publisher
Trans Tech Publications, Ltd.
Reference9 articles.
1. David mendlovic，Naim Konforti. Optical realization of the wavelet transform for two-dimensional objects [J]. Applied Optics(S1559-128X)，1993，32(32)：6542-6546.
2. CAI De，YAN Ying-bai，JIN Guo-fan. The research on the dual multichannel iris recognition system [J]. Acta Photonica Sinica，2006，32(2)：308-310.
3. CAI De，YAN Ying-bai，JIN Guo-fan. Improving optical wavelet transform by optical separable wavelet transform [J]. Optical Technique，2006，32(2)：296-298.
4. CHU Heng，LI Jie，ZHU Wei-le. Multi-focus image fusion scheme with wavelet transform [J]. Opto-Electronic Engineering，2005，32(8)：59-63.
5. DAI Guang-zhi，CHEN Tie-qun，XUE Jia-xiang. Improvement of resolution for ultrasonic image based on wavelet image fusion [J]. Optics and Precision Engineering，2008，16(11)：2290-2295.