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De-Speckling of SAR Images with Fuzzy Filters along with Altered Preserved Edge Values

Journal of Computer and Communications 2022年第3期10卷 10-28页

作者： Md. Mynoddin mohd. foyzul kabir Nazrul Islam Rezaul Karim Hasin Rehana Sayed Asaduzzaman Department of Computer Science and Engineering Rangamati Science and Technology University Rangamati Bangladesh Department of Software Engineering Daffodil International University Dhaka Bangladesh Department of Information and Communication Technology Mawlana Bhashani Science and Technology University Tangail Bangladesh Department of Mathematics Mawlana Bhashani Science and Technology University Tangail Bangladesh Department of Computer Science and Engineering Daffodil International University Dhaka Bangladesh

In this research, the denoising of speckled SAR image has been done with fuzzy filters (ATMED, TMED, ATMAV & TMAV). SAR image or Synthetic Aperture Radar image consists of the informatics of ISW (Internal solitary waves). A new technique has been proposed which preserved the edge pixels by fuzzy edge detection method and then altered with the filtered image-pixels by fuzzy filtration for getting the denoised image. The comparative result shows that the proposed filter performs better than the other filtered results in terms of PSNR (41.61 dB), MAE (1.47), MSE (4.54) for TMAVxAPE & SSIM (81%) for ATMEDwAPE. The proposed method in this research shows better SSI (Spackle Suppression Index) value. Therefore the experimental result illustrates that the suggested fuzzy filter is much more capable of simultaneously protecting edges and suppressing speckle noise. This research will be beneficial to remove spackle noise from SAR images and can be used for remote sensing and mapping of surface area of earth.

关键词： SAR Image Image Processing Fuzzy Logic Speckle Noise Noise Reduction

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Biometrics of the rare fish Rhinomugil corsula(Hamilton,1822)(Mugiliformes:Mugilidae)in the Ganges,Northwestern Bangladesh

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Journal of Coastal Life Medicine 2013年第4期 253-258页

作者： Md.Yeamin Hossain Md.foyzul Hassan Fahad Md.Mosaddequr Rahman Nipa Chaki Saleha Jasmine Zoarder Faruque Ahmed Jun Ohtomi Department of Fisheries Faculty of AgricultureUniversity of RajshahiRajshahiBangladesh Faculty of Fisheries Kagoshima UniversityKagoshimaJapan Department of Fisheries Management Faculty of FisheriesBangladesh Agricultural UniversityMymensinghBangladesh

Objective:To investigate biometrics of the Rhinomugil corsula(Hamilton,1822)(***),including length-weight relationships(LWRS),condition factors(Allometric,K_(A);Fulton's,K_(F);Relative,K_(R);Relative weight,W_(R)),and sex ratio and length-frequency distributions in the Ganges(Padma River),Northwestern ***:Monthly sampling was conducted using traditional fishing gears during June to August *** length was measured to the nearest 0.01 cm using digital slide calipers,and total body weight was measured using an electronic balance with 0.01 g *** LWR was calculated using the expression:W=a×L_(b),where the W is the body weight,L is the total length,a and b are the parameters of the ***:A total of 350 specimens ranging from 8.59-15.71 cm in total length and 9.57-32.59 g in body weight were analyzed during this *** overall sex ratio was not significantly different from the expected value of 1:1(X^(2)=2.57,P>0.05),but there was significant difference in the length-frequency distributions between the sexes(P=0.03).The allometric coefficient b for the LWR indicated negative allometric growth(b=3.00)in males,female and combined *** further indicated that Kr was not significantly different between the sexes(P=0.57).However,the mean W_(R)of *** showed significant differences from 100 for males(P=0.03)and females(P<0.001)in this study,indicating the imbalance habitat with food availability relative to the presence of ***:This study reported the first description of biometric relationships for ***,which would be useful for the sustainable conservation of this rear fishery in Bangladesh and also neighboring countries.

关键词： Bangladesh Ganges Length-weight relationship Condition factor Rhinomugil corsula

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