Journal ArticleDOI
Locating the eye in human face images using fractal dimensions
K.-H. Lin,Kin-Man Lam,Wan-Chi Siu +2 more
- Vol. 148, Iss: 6, pp 413-421
TLDR
A modified approach to estimating fractal dimensions that is less sensitive to lighting conditions and provides information about the orientation of an image under consideration is proposed.Abstract:
Facial feature extraction is an important step in many applications such as human face recognition, video conferencing, surveillance systems, human computer interfacing etc. The eye is the most important facial feature. A reliable and fast method for locating the eye pairs in an image is vital to many practical applications. A new method for locating eye pairs based on valley field detection and measurement of fractal dimensions is proposed. Possible eye candidates in an image with a complex background are identified by valley field detection. The eye candidates are then grouped to form eye pairs if their local properties for eyes are satisfied. Two eyes are matched if they have similar roughness and orientation as represented by fractal dimensions. A modified approach to estimating fractal dimensions that is less sensitive to lighting conditions and provides information about the orientation of an image under consideration is proposed. Possible eye pairs are further verified by comparing the fractal dimensions of the eye-pair window and the corresponding face region with the respective means of the fractal dimensions of the eye-pair windows and the face regions. The means of the fractal dimensions are obtained based on a number of facial images in a database. Experiments have shown that this approach is fast and reliable.read more
Citations
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Journal ArticleDOI
An improved box-counting method for image fractal dimension estimation
Jian Li,Qian Du,Caixin Sun +2 more
TL;DR: A new model is proposed to assign the smallest number of boxes to cover the entire image surface at each selected scale as required, thereby yielding more accurate estimates of fractional dimension estimation accuracy.
Journal ArticleDOI
Spatially eigen-weighted Hausdorff distances for human face recognition
TL;DR: Two modified Hausdorff distances, namely, SEW2HD and SEW2HD are proposed, which incorporate the information about the location of important facial features such as eyes, mouth, and face contour so that distances at those regions will be emphasized.
Journal ArticleDOI
EEMD-based online milling chatter detection by fractal dimension and power spectral entropy
TL;DR: In this paper, the acceleration signals acquired by sensor were decomposed into a series of intrinsic mode functions (IMFs) by the adaptive analysis method named ensemble empirical mode decomposition (EEMD), and the IMFs which contain the feature information of milling process were selected as the analyzed signals.
Journal ArticleDOI
Fractal dimension for fractal structures
TL;DR: A new definition in order to compute the fractal dimension of a subset respect to any fractal structure, which completes the theory of classical box-counting dimension and allows to classify and distinguish a much larger number of topological spaces than the classical definition.
Journal ArticleDOI
Differential box counting methods for estimating fractal dimension of gray-scale images: A survey
TL;DR: The status of differential box counting methods is concluded, some of the state-of-the-art methods have been implemented and the possible future directions are explored.
References
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Journal ArticleDOI
An efficient differential box-counting approach to compute fractal dimension of image
N. Sarkar,Bidyut B. Chaudhuri +1 more
TL;DR: An efficient differential box-counting approach to estimate fractal dimension is proposed and by comparison with four other methods, it has been shown that the method is both efficient and accurate.
Journal ArticleDOI
Locating and extracting the eye in human face images
Kin-Man Lam,Hong Yan +1 more
TL;DR: The corner detection scheme introduced in this paper can provide accurate information about the corners and accurately locate the templates in relation to the eye images and greatly reduce the processing time for the templates.
Journal ArticleDOI
A novel method for automatic face segmentation, facial feature extraction and tracking
K. Sobottka,Ioannis Pitas +1 more
TL;DR: A novel method for the segmentation of faces, extraction of facial features and tracking of the face contour and features over time, using deformable models like snakes is described.
Journal ArticleDOI
Tutorial On Advances In Morphological Image Processing And Analysis
TL;DR: In this article, the morphological erosions or dilations of morphological filters are used to provide simple and systematic algorithms for image processing and analysis tasks as diverse as nonlinear image filtering, noise suppression, edge detection, region filling, skeletonization, coding, shape representation, smoothing, and recognition.
Journal ArticleDOI
Variance projection function and its application to eye detection for human face recognition
Guocan Feng,Pong C. Yuen +1 more
TL;DR: The variance projection function is developed and employed to locate landmarks of the human eye which are then used to guide the detection of the eye position and shape.
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