Canny's edge detection algorithm is a classical and robust method for edge detection in gray-scale images. The two significant features of this method are introduction of NMS (Non-Maximum Suppression) and double thresholding of the gradient image. Due to poor illumination, the region boundaries in an image may become vague, creating uncertainties in the gradient image. In this paper, we have pr...

A. Bigdelou, L. Schwarz, N. Navab. “An Adaptive Solution for Intra-operative Gesture-based Human-Machine Interaction.“ International ACM Conference on Intelligent User Interfaces (IUI), Lissabon, Portugal, February 2012 L. Schwarz, A. Bigdelou, N. Navab “Learning Gestures for Customizable Human-Computer Interaction in the Operating Room.“ Medical Image Computing and Computer Assisted Intervent...

This paper describes the approach proposed by ARTEMISUBIMEDIA team at TRECVID 2011, Instance Search (INS) task. The method is based on a semi-global image representation relying on an over-segmentation of the keyframes. An aggregation mechanism was then applied in order to group a set of sub-regions into an object similar to the query, under a global similarity criterion.

Editor's Note: These short, critical reviews of recent papers in the Journal, written exclusively by graduate students or postdoctoral fellows, are intended to summarize the important findings of the paper and provide additional insight and commentary. For more information on the format and purpose of the Journal Club, please see Review of Kang et al. Presenting an image to one eye and a dissim...

Tidal wetland restoration efforts can be challenging to monitor in the field due to unstable local conditions and poor site access. However, understanding how restored systems evolve over time is essential for future management of their ecological benefits, many of which are related to vegetation dynamics. Physical attributes, such as elevation and distance to channel play important roles in go...

Microscopy imaging systems with a very wide field-of-view (FOV) are highly sought in biomedical applications. In this paper, we report a wide FOV microscopy imaging system that uses a low-cost scanner and a closed-circuit-television (CCTV) lens. We show that such an imaging system is capable to capture a 10 mm * 7.5 mm FOV image with 0.77 micron resolution, resulting in 0.54 gigapixels (10 9 pi...

This paper presents a low noise CMOS image sensor (CIS) using 10/12 bit configurable column-parallel single slope ADCs (SS-ADCs) and digital correlated multiple sampling (CMS). The sensor used is a conventional 4T active pixel with pinned-photodiode as detector. The test sensor has been fabricated in 0.18 μm CMOS image sensor process from TSMC. The ADC nonlinearity measurement result shows tota...

Different chemical databases contain molecule structures with links to articles and patents, where such molecules are presented as images. Keeping such a database in a consistent state is a challenging problem, and, thus, efficient and accurate molecule image recognition algorithms are very important for solving this task. We present an open-source toolkit for 2D chemical structure image recogn...