2007
DOI: 10.1093/ietcom/e90-b.2.429
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Adaptive Vector Directional Filters to Process Multichannel Images

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Cited by 23 publications
(24 citation statements)
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“…In the simulations, we considered the conventional triangular SAR range ambiguity function (AF) Ψ r (x 2 ) and two approximations of the SAR azimuth AF: (i) "sinc" approximation, Ψ (1) a (x 1 ) = |sinc(x 1 /a)|, and (ii) Gaussian "bell" approximation, Ψ (2) a (x 1 ) = exp (− (x 1 ) 2 /a 2 ), with the adjustable fractional parameters a [15]. Note that in the imaging radar theory [3,8], the AF is referred to as the continuous-form approximation of the ambiguity operator matrix Ψ = S + S and serves as an equivalent to the point spread function in the conventional image processing terminology [16,19]. In this paper, we present the simulations performed with two characteristic scenes.…”
Section: Simulations and Discussionmentioning
confidence: 99%
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“…In the simulations, we considered the conventional triangular SAR range ambiguity function (AF) Ψ r (x 2 ) and two approximations of the SAR azimuth AF: (i) "sinc" approximation, Ψ (1) a (x 1 ) = |sinc(x 1 /a)|, and (ii) Gaussian "bell" approximation, Ψ (2) a (x 1 ) = exp (− (x 1 ) 2 /a 2 ), with the adjustable fractional parameters a [15]. Note that in the imaging radar theory [3,8], the AF is referred to as the continuous-form approximation of the ambiguity operator matrix Ψ = S + S and serves as an equivalent to the point spread function in the conventional image processing terminology [16,19]. In this paper, we present the simulations performed with two characteristic scenes.…”
Section: Simulations and Discussionmentioning
confidence: 99%
“…, instead of the MSF, i.e., the adjoint operator F (1) = S + ) was accomplished. In analogy to image reconstruction quality metrics [16,19], we adopt here the quality metric defined as an improvement in the output signal-to-noise ratio (IOSNR):…”
Section: Simulations and Discussionmentioning
confidence: 99%
“…where b r, r'; t represents the kernel PSF in evolution time t corresponding to the continuous-form dynamic generalization of the PSF matrix D[i] specified by (13), and M defines the metrics inducing operator. …”
Section: Dedr-va-optimal Dynamic Ssp Reconstructionmentioning
confidence: 99%
“…The FD filter has been evaluated, and its performance has been compared with INR (Schulte, et al, 2007), MMKNN (Ponomaryov, et al, 2007), AMNF, WMKNN, and ABSTMKNN (Ponomaryov, et al, 2005b), VMF_SAR (Smolka, et al, 2003), WVDF1 (Lukac, 2003) and AVMF (Lukac, et al, 2004) filters. The 320x320 colour images Lena and Mandrill, were corrupted by impulsive noise in wide range of intensity, from 5% to 30%.…”
Section: Noise Suppression In Colour Images Using the Fd Filtermentioning
confidence: 99%