Microscopy & Microtechniques
Frequency domain (Wavelet) investigation of OCT images of skin
Sep 20 2011
Author: Mohammad R. N. Avanaki, hashem Jafaree, Ali Hojjat, and Adrian Gh. Podeleanu on behalf of Unassigned Independent Article
In this article we investigate the use of wavelet transform on the images produced by an optical coherence tomography (OCT) to obtain further information from the OCT images transformations in different levels of decomposition with two wavelet mother functions, in frequency domain. To transform the image from the spatial domain to the frequency domain, wavelet transformation of the image was used as it was found that the images obtained from the wavelet transform include more details than those obtained from Fourier transform. The OCT system employed for imaging was an en-Face time domain OCT which uses a dynamic focus scheme (Figure 1). With dynamic focus, the coherence gate is synchronised with the confocal gate; hence, the transverse resolution is conserved throughout the depth range and an enhanced signal is returned from all depths. Therefore, higher resolution images than those of standard OCT can be obtained. This OCT system is especially designed for use in applications where a high lateral resolution and a large depth range are required. The system uses a super luminescent diode (SLD) with a central wavelength of 1300 nm and a spectral bandwidth 54 nm.
Digital Edition
International Labmate Buyers' Guide 2024/25
June 2024
Buyers' Guide featuring: Product Listings & Manufacturers Directory Chromatography Articles - Enhancing HPLC Field Service with fast-response, non-invasive flowmeters - Digital transformatio...
View all digital editions
Events
Jul 03 2024 Gandhinagar, India
Jul 07 2024 Dublin, Ireland
Jul 20 2024 Denver, CO, USA
Jul 21 2024 Cape Town, South Africa
Jul 28 2024 San Diego, CA USA