Group-buying sites such as Groupon and LivingSocial offer daily deals at large discounts of typically 50% or more. Such deals are also characterized by two temporal features. First, these deals involve lead time before they are available for redemption. Second, such deals are available for a limited time only. This study examines how the two temporal features (lead time and deal time) of group-...

An important factor for defining a good image during laparoscopic surgery is the zooming ratio, which corresponds to the depth of insertion of the laparoscope along its longitudinal axis. However, it is not clear how surgeons (camera assistants) decide the zooming ratio of laparoscopic images during surgery. Conventional automatic camera positioning systems define the zooming ratio "uniformly" ...

A Photo Browser Applying Photomosaic Kiho SAKAMOTO and Takayuki ITOH †Department of Information Sciences, Faculty of Science, Ochanomizu University 2-1-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012 Japan E-mail: † {keyhole, itot}@itolab.is.ocha.ac.jp Abstract This paper introduces a photo browser applying photomosaic. Photomosaic is a technique to produce large images by arranging many small images like...

We have developed and evaluated a prototype image browser based on flip zooming, a focus+context visualization technique. In a formative evaluation, we contrasted the technique with two other methods to present images. The evaluation showed that users appreciated the overview that the flip zooming prototype provided. However, we also learned that the current prototype lacked some important feat...

In this paper we address the problem of producing an enlarged picture from a given digital image (zooming). We propose a method that takes into account information about discontinuities or sharp luminance variations while zooming the input picture. This is realized by a nonlinear iterative procedure of the zoomed image and could hence be implemented with limited computational resources. The alg...

In this paper we propose a new approach for visualservoing with respect to a set of 3D straight lines. The main difference with respect to previous approaches is that the new scheme can be used with a zooming camera or even if the reference image has been learned with a different camera. The zoom is particularly useful in order to keep the visual features in the camera field of view and/or to b...

In object recognition, there are several situations which may cause object image detection failure including that the object zooming in, zooming out, rotated, mirror, or something deformation and the object sizes become irregular. In this paper, an object normalization technique used to make the object into standard, an affine transform technique make the same object to meet any irregular shape...

We present an interpolation algorithm for adaptive color image zooming. The algorithm produces the magnified image in one scan of the input image, and is fully automatic since does not involve any a priori fixed threshold. Given any integer zooming factor n, each pixel of the input image generates an n n block of pixels in the zoomed image. For the currently visited pixel of the input image, th...

Low resolution iris image can degrade the performance of iris recognition. A new iris image zooming method by using edge-directed image upsampling method based on radial basis function (RBF) interpolation [9] is proposed to restore a single iris image into a highresolution image. By increasing the resolution of iris image, we found that the performance of iris recognition was increased.