Sukanya Phongsuphap

Mahidol University | MU

The natural-indigo-dyed fabric is a kind of eco-friendly products as every step of its production process is environmentally friendly. At present, natural-indigo-dyed fabrics become more popular, and expensive. Consequently, there are a number of counterfeit or fake natural-indigo-dyed fabrics selling in markets. To alleviate this problem, in this...

The emergence of Twitter in Thailand has given millions of users a platform to express and share their opinions about products and services, among other subjects, and so Twitter is considered to be a rich source of information for companies to understand their customers by extracting and analyzing sentiment from Tweets. This offers companies a fast...

The emergence of Twitter in Thailand has given millions of users a platform to express and share their opinions about products and services, among other subjects, and so Twitter is considered to be a rich source of information for companies to understand their customers by extracting and analyzing sentiment from Tweets. This offers companies a fast...

This paper proposes a method for evaluating responsiveness of health systems. The method is based on a fuzzy model, which can tackle uncertainty of survey data, and perform corresponding to the way that human being makes decisions and adjustments. To measure responsiveness of health systems, we have defined five fuzzy sets for two input variables:...

This paper presents a method for reading medical documents by using an Android smartphone. We have used techniques based on the Tesseract OCR Engine to extract the text content from medical document images such as a physical examination report. The following factors related to the document are considered: character font, text block size, and distan...

This paper aims at investigating variations of color display on computer screens or websites compared with color of the real products. We focus on displaying indigo-dyed fabric image which is one of the famous textile products of Thailand. Eighty-five college students participated in our experiments to test the similarity of color of indigo fabric...

Significant documents or old scarce books have been saved in digital forms by scanning. However, some noises may occur in a scanned image such as marginal noises. The marginal noises usually appear as dark regions around the margin of the scanned documents. In this paper, we propose a method for removing marginal noise by analyzing image histogram...

This paper proposes a new set of image features called emotional color features. They are derived from the relationship between color and emotion. The procedure is as follows. An input color image is transformed from RGB to L*aV and L*C*h color models. Then, the color data are divided into 20 groups of emotional color using the CIE delta E measurem...

Mental stress is one of the well known major risk factors for many diseases such as hypertension, coronary artery disease, heart attack, etc. Conventionally, detecting mental stress in an individual is performed by interviews and/or questionnaires. In this study, we have investigated various heart rate variability (HRV) measures for detecting menta...

The main objective of this study is to investigate patterns of heart rate variability during concentration meditation to understand its effects on health. Our method consisted of three major stages: Signal acquisition, Feature extraction, and Classification. The input signals are RR interval signals which were collected from 105 subjects. By K-mean...

Endoscopic surgery has brought about massive changes in cardiac and thoracic surgery. The therapeutic capabilities of endoscopy provide beneficial diagnosis and treatment for physician. Although, the endoscopic surgery shows a marked improvement in diagnosis and treatment, the endoscopy video still has some frames that contain no useful information...

In video frame rate conversion, unavailable frames are reconstructed from existing frames based on interpolated motion vectors. Due to an error in estimating motion vectors and an occlusion effect, it is possible that intensity information is not provided to every pixel in the reconstructed frame. Pixels whose intensity is missing become holes in t...

This paper proposes a method for identifying a gender by using a Thai spoken syllable with the Average Magnitude Difference Function (AMDF) and a neural network (NN). The AMDF is applied to extracting pitch contour from a syllable. Then the NN uses the pitch contour to identify a gender. Experiments are carried out to evaluate the effects of Thai t...

The quality of the frame rate up-conversion depends on the accuracy of the motion parameters. 2D affine model describes the motion better than the popular 2D translation model; however, its parameters are difficult to interpolate. In this paper, the approximation method for interpolating the mid-point of 2D affine parameters is proposed. The affine...

This study aims at investigating changes in heart rate variability (HRV) measured during meditation. The statistical and spectral measures of HRV from the RR intervals were analyzed. Results indicate that meditation may have different effects on health depending on frequency of the resonant peak that each meditator can achieve. The possible effects...

This paper proposes a new operator called the surface-shape operator for describing image structure. We consider an image function as a bivariate surface, then established the surface-shape operator for describing the shape of each pixel compared with its neighborhood. From a geometry viewpoint, the types of surface shapes are elliptic, hyperbolic,...

Traffic signs have characteristics color, spatial arrangement, and texture. In this paper we describe how to select the video frame in which the traffic sign has the largest size. We select it using three methods color filtering, a detection window, and textural analysis. Experimental results show that our combination of different methods works wel...

This paper proposes an operator called the surface-shape sperator for describing image structures. By considering an image function as a surface, the surface-shape operator is established for describing the shape of each pixel compared with its neighbourhood, In this paper,the surface-shape operator is used as a pre-processing for describing the mu...

This paper proposes a method of multiscale image analysis through an operator called the “surface-shape operator”. By considering an image function as a surface function, the surface-shape operator describes shape of each pixel in terms of the topographic structure such as hill, dale, ridge, valley, etc. The surface-shape operator is used as a pre-...

This paper introduces a new operator called the surface- shape operator for describing image structure. An image function is considered as a bivariate surface, then the surface-shape operators is established for describing shape of each pixel comparing with its neighborhood by utilizing surface curvatures. In the geometry viewpoint, types of surfac...

This paper introduces new features for describing image patterns. We integrate the concepts of multiscale image analysis, aura matrix to define image features, and to obtain the features having robustness with illumination variations and shading effects, we analyse images based on the topographic structure described by the surface-shape operator. T...

In this paper, we propose a new approach for describing image patterns. We integrate the concepts of multiscale image analysis, aura matrix (Gibbs random fields and cooccurrences related statistical model of texture analysis) to define image features, and to obtain the features having robustness with illumination variations and shading effects, we...

Properly representing image structure is a major problem faced in developing a computer vision system. This paper proposes a concise descriptor called the shape operator for describing image structure. We first consider an image function as a surface, then establish the shape operator by utilizing surface curvatures. The shape operator can give ric...

In this paper, we propose a new operator called shape operator for describing image structure. We consider an image function as a surface, then describe a shape of each pixel comparing with its neighbourhood in terms of topographical shapes such as hill, dale, ridge, valley, etc. The shape operator is established by utilizing the eigenvalues of Hes...

To develop a computer vision system, it is necessary to define a proper image structure representation to be used for interpreting images efficiently. In this paper, we propose a new operator called shape operator for describing topographical image structure. We consider an image function as a surface, then describe a shape of each pixel comparing...

In this paper, we propose a new operator called the Surface- Shape operator (SS-operator) for determining local surface shape, and use it for analyzing image structure. We consider an image function as a bivariate surface, then describe a shape of each pixel comparing with its neighborhood. In a geometry viewpoint, types of surface shapes are ellip...

In this paper, we present a structural and statisti- cal approach for texture classification. It can achieve with a higher accuracy rate comparing to the Spatial Gray Level Dependence (SGLD) method and Laws' method. Our method uses the previously proposed operator, the Surface-Shape operator (SS-operator), for describing topographic structure of te...

This paper is about constructing a virtual work space for performing any tasks by both hands manipulation. We intend to provide a virtual enviornment that can encourage users to accomplish any tasks as they usally act in the real environment. Our approach is using a three dimensional spatial interface device that allows the user to handle virtual o...