Robust Visual Tracking Revisited: From Correlation Filter to Template Matching

In this paper, we propose a novel matching based tracker by investigating the relationship between template matching and the recent popular correlation filter based trackers (CFTs). Compared to the correlation operation in CFTs, a sophisticated similarity metric termed "mutual buddies similarity" (MBS) is proposed to exploit the relationship of multiple reciprocal nearest neighbors for target matching. By doing so, our tracker obtains powerful discriminative ability on distinguishing target and background as demonstrated by both empirical and theoretical analyses. Besides, instead of utilizing single template with the improper updating scheme in CFTs, we design a novel online template updating strategy named "memory filtering" (MF), which aims to select a certain amount of representative and reliable tracking results in history to construct the current stable and expressive template set. This scheme is beneficial for the proposed tracker to comprehensively "understand" the target appearance variations, "recall" some stable results. Both qualitative and quantitative evaluations on two benchmarks suggest that the proposed tracking method performs favorably against some recently developed CFTs and other competitive trackers.Comment: has been published on IEEE TI

Improving numeracy in key stage 2 and key stage 3

"The purpose of the report is to evaluate the effectiveness of initiatives to improve standards of numeracy and to identify examples of best practice in key areas. These areas include basic skills numeracy support programmes, the use of numeracy in subjects across the curriculum and the effectiveness of provision for pupils’ movement from key stage 2 to key stage 3." - introduction

A Load of Cobbler’s Children: Beyond the Model Designing Processor

HCI has developed rich understandings of people at work and at play with technology: most people that is, except designers, who remain locked in the information processing paradigm of first wave HCI. Design methods are validated as if they were computer programs, expected to produce the same results on a range of architectures and hardware. Unfortunately, designers are people, and thus interfere substantially (generally to good effects) with the ‘code’ of design methods. We need to rethink the evaluation and design of design and evaluation methods in HCI. A logocentric proposal based on resource function vocabularies is presented