نتایج جستجو برای: fast discrete curvelet transform
تعداد نتایج: 471537 فیلتر نتایج به سال:
We are interested in developing a programmable baseband processor for multiple radio standards, including the wireless LAN standards 802.11a and 802.11b. 802.11a is based on OFDM and uses a 64-point FFT. Demodulation of the complementary code keying (CCK) used in 802.11b includes the computation of a modified Walsh transform. Similarities have been found between the radix-4 FFT and the fast Wal...
BACKGROUND AND AIM Merging multimodal images is a useful tool for accurate and efficient diagnosis and analysis in medical applications. The acquired data are a high-quality fused image that contains more information than an individual image. In this paper, we focus on the fusion of MRI gray scale images and PET color images. METHODS For the fusion of MRI gray scale images and PET color image...
In this paper, an optimal and intelligent multi-focus image fusion algorithm is presented, expected to achieve perfect reconstruction or optimal fusion of multi-focus images with high speed. A synergistic combination of segmentation techniques and binary particle swarm optimization (BPSO) intelligent search strategies is employed in salience analysis of contrast feature-vision system. Also, sev...
the fusion of medical images is very useful for clinical application. generally, the pet image indicates the function of tissue and the mri image shows the anatomy of tissue. in this article we fused mri and pet images and the purpose is adding structural information from mri to pet image. the images decomposed with curvelet transform, and then two images fused with applying fusion rules. we us...
0167-8655/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.patrec.2009.10.018 * Corresponding author. Address: School of Aero Beijing 100084, China. Tel.: +86 10 62781824. E-mail address: [email protected] (J. Ma). Curvelet transform is a multiscale and multidirectional geometric wavelet transform, which is an optimal sparse representation of edges and contours of objects. In this paper,...
SURE-LET Approach is used for reducing or removing noise in brain Magnetic Resonance Images (MRI). Removing or reducing noise is an active research area in image processing. Rician noise is the dominant noise in MRIs. Due to this type of noise, the abnormal tissue (cancerous tissue) may be misclassified as normal tissue and introduces bias into MRI measurements that can have significant impact ...
In this paper, an approach based on Kekre’s fast code book Generation (KFCG) Algorithm in the transform domain has been proposed. KFCG is used for feature extraction in both the training and testing phases. Three methods for codebook generation have been used. In the 1st method, codebooks are generated from the speech samples by using Discrete Fourier Transform (DFT). In the 2nd method, the cod...
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