The Zygo NewView 200 is a scanning white-light interferometer that uses frequency domain analysis (FDA) to generate quantitative 3D images of surfaces. FDA is a mathematical method for processing complex interferograms in terms of phases andP De GrootL DeckR & D Technical Bulletin...
摘要: This letter presents a new and simplified derivation of the frequency-domain representation of color images sampled with the Bayer color filter array. Two new demosaicking algorithms based on the frequency-domain representation are described and shown to give excellent results....
We term our newly built block as Res FFT-ReLU Block, which takes advantages of both kernel-level and pixel-level features via learning frequency-spatial dual-domain representations. Extensive experiments are conducted to acquire a thorough analysis on the insights of the method. Moreover, after ...
In this paper, a saliency detection model for images is proposed based on frequency domain analysis and spatial information. Saliency is detected in the proposed model via the following main steps: coefficients of the input hyper complex image are designed in Hyper Complex Fourier Transform (HFT);...
We consider a common frequency-domain procedure hilbert for generating discrete-time analytic signals and show how it fails for a specific class of signals. A new frequency-domain technique ehilbert is formulated that solves the defect. Moreover, the new technique is applicable to all discrete-tim...
Results of statistical and differential analysis show that the proposed algorithm has high security for secure digital images. Furthermore, it has key sensitivity together with a large key space and is very fast compared to other competitive algorithms. 展开 ...
This paper shows how the directional image enhancement can also be done in the frequency domain. This approach overcomes the noise and high-curvature limitation of the spatial domain methods. 展开 关键词: Fingerprint recognition Image enhancement ...
In this project, image filtering in frequency domain is studied. The main two parts of the project are mainly concerned with finding and displaying the Fourier spectrum of an image. For better visualization of the frequency, the Fourier spectrum is shifted to the center when be displayed. The ...
images' edge direction curves,the possible rotation angle between the two images will be obtained.After rotating images and transforming them with 2D Fourier,the phase correlation will be gained in frequency domain and the maximum of the correlation coefficient will be found in that position which ...
Fusion of infrared and visible images based on focus measure operators in the curvelet domain frequency information of the infrared image and adding the low-frequency features of the visible image to the fused image; meanwhile, the fourth-order ... S Zhenfeng,L Jun,C Qimin - 《Appl Opt》 被...