Y.Sowjanya Kumari

Work place: Dept. CSE, SACET, Chirala, Andhrapradesh, India

E-mail: sowji74@yahoo.co.in


Research Interests: Image Processing, Image Manipulation, Image Compression, Pattern Recognition


Mrs. Y.Sowjanya Kumari working as Associate Professor in SACET (Affiliated to JNT University, Kakinada), Chirala, India and she has 13 years of teaching experience. Presently she is Pursuing Ph.D. in JNT University, Kakinada under the guidance of Dr. V.Vijaya Kumar. She has received M.Tech. in Computer Science & Engineering from JNTU, Kakinada A.P and B.Tech in Computer Science & Engineering from N.B.K.R.I.S.T, Vidyanagar, Nellore(dt) A.P. Her areas of interesting includes Digital image processing and Pattern recognition.

Author Articles
Classification of Textures based on Noise Resistant Fundamental Units of Complete Texton Matrix

By Y.Sowjanya Kumari V.Vijaya Kumar Ch. Satyanarayana

DOI: https://doi.org/10.5815/ijigsp.2018.02.05, Pub. Date: 8 Feb. 2018

One of the popular descriptor for texture classification is the local binary pattern (LBP). LBP and its variants derives local texture features effectively. This paper integrates the significant local features derived from uniform LBPs(ULBP) and threshold based conversion factor non-uniform (NULBP) with complete textons. This integrated approach represents the complete local structural features of the image.   The ULBPs are proposed to overcome the wide histograms of LBP. The ULBP contains fundamental aspects of local features.  The LBP is more prone to noise and this may transform ULBP into NULBP and this degrades the overall classification rate. To addresses this, this paper initially transforms back, the ULBPs that are converted in to NULBPs due to noise using a threshold based conversion factor and derives noise resistant fundamental texture (NRFT) image. In the literature texton co-occurrence matrix(TCM) and multi texton histogram (MTH) are derived on a 2x2 window. The main disadvantage of the above texton groups is they fail in representing complete textons. In this paper we have integrated our earlier approach “complete texton matrix (CTM)” [16] on NRFT images. This paper computes the gray level co-occurrence matrix (GLCM) features on the proposed NRFCTM (noise resistant fundamental complete texton matrix) and the features are given to machine learning classifiers for a precise classification. The proposed method is tested on the popular databases of texture classification and classification results are compared with existing methods.

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Texture Classification Using Complete Texton Matrix

By Y.Sowjanya Kumari V.Vijaya Kumar V. Vijayalakshmi

DOI: https://doi.org/10.5815/ijigsp.2017.10.07, Pub. Date: 8 Oct. 2017

This paper presents a complete image feature representation, based on texton theory proposed by Julesz’s, called as a complete texton matrix (CTM)for texture image classification. The present descriptor can be viewed as an improved version of texton co-occurrence matrix (TCM) [1] and Multi-texton histogram (MTH) [2]. It is specially designed for natural image analysis and can achieve higher classification rate. TheCTM can express the spatial correlation of textons and can be considered as a generalized visual attribute descriptor. This paper initially quantized the original textures into 256 colors and computed color gradient from RGB vector space. Then the statistical information of eleven derived textons, on a 2 x 2 grid in a non-overlapped manner are computed to describe image features more precisely. To reduce the dimensionality the present paper extended the concept of present descriptor and derived a compact CTM (CCTM). The proposed CTM and CCTM methods are extensively tested on the Brodtaz, Outex and UIUC natural images. The results demonstrate the superiority of the present descriptor over the state-of-art representative schemes such as uniform LBP (ULBP), local ternary pattern (LTP), complete –LBP (CLBP), TCM and MTH.

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