منابع مشابه
Isophote-based Interpolation
Standard methods for image interpolation are based on smoothly fitting the image intensity surface. Recent edgedirected interpolation methods add limited geometric information (edge maps) to build more accurate and visually appealing interpolations at key contours in the image. This paper presents a method for geometry-based interpolation that smoothly fits the isophote (intensity level curve) ...
متن کاملGeometry of Isophote Curves
We consider the intensity surface of a 2D image, we study the evolution of the symmetry sets (and medial axes) of 1-parameter families of iso-intensity curves. This extends the investigation done on 1-parameter families of smooth plane curves (Bruce and Giblin, Giblin and Kimia, etc.) to the general case when the family of curves includes a singular member, as will happen if the curves are obta...
متن کاملOn isophote curves and their characterizations
An isophote curve comprises a locus of the surface points whose normal vectors make a constant angle with a fixed vector. The main objective of this paper is to find the axis of an isophote curve via its Darboux frame and afterwards to give some characterizations about the isophote curve and its axis in Euclidean 3-space. Particularly, for isophote curves lying on a canal surface other characte...
متن کاملRecognizing focus areas using isophote pupil location
In several subject areas within computer science, such as usability research and alternative input devices, eye gaze tracking plays an important role. While there are several existing approaches (eg. [17, 16, 15]), most of them are either invasive by requiring the attachment of sensors, cameras or controllers to the user’s head, or are prohibitively expensive, such as those using infrared corne...
متن کاملIsophote Based Center-Surround Contrast Computation for Image Saliency Detection
In this paper, we introduce a biologically-motivated model to detect image saliency. The model employs an isophote based operator to detect potential structure and global saliency information related to each pixel, which are then combined with integral image to build up final saliency maps. We show that the proposed model outperforms seven state-of-the-art saliency detectors in experimental stu...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1987
ISSN: 0074-1809
DOI: 10.1017/s0074180900185043