title: 3D face recognition using multiview keypoint matching

authors: Mayo, Michael

subjects: computer science

abstract: A novel algorithm for 3D face recognition based point cloud rotations, multiple projections, and voted keypoint matching is proposed and evaluated. The basic idea is to rotate each 3D point cloud representing an individual’s face around the x, y or z axes, iteratively projecting the 3D points onto multiple 2.5D images at each step of the rotation. Labelled keypoints are then extracted from the resulting collection of 2.5D images, and this much smaller set of keypoints replaces the original face scan and its projections in the face database. Unknown test faces are recognised firstly by performing the same multiview keypoint extraction technique, and secondly, the application of a new weighted keypoint matching algorithm. In an extensive evaluation using the GavabDB 3D face recognition dataset (61 subjects, 9 scans per subject), our method achieves up to 95% recognition accuracy for faces with neutral expressions only, and over 90% accuracy for face recognition where expressions (such as a smile or a strong laugh) and random faceoccluding gestures are permitted.

text: 3D face recognition using multiview keypoint matching A novel algorithm for 3D face recognition based point cloud rotations, multiple projections, and voted keypoint matching is proposed and evaluated. The basic idea is to rotate each 3D point cloud representing an individual’s face around the x, y or z axes, iteratively projecting the 3D points onto multiple 2.5D images at each step of the rotation. Labelled keypoints are then extracted from the resulting collection of 2.5D images, and this much smaller set of keypoints replaces the original face scan and its projections in the face database. Unknown test faces are recognised firstly by performing the same multiview keypoint extraction technique, and secondly, the application of a new weighted keypoint matching algorithm. In an extensive evaluation using the GavabDB 3D face recognition dataset (61 subjects, 9 scans per subject), our method achieves up to 95% recognition accuracy for faces with neutral expressions only, and over 90% accuracy for face recognition where expressions (such as a smile or a strong laugh) and random faceoccluding gestures are permitted.

year: 2009

title: The long-term effect of marketing strategy on brand sales.

authors: Ataman, M. Berk

subjects: marketing mix

abstract: Few studies have considered the relative role of the integrated marketing mix (advertising, price promotion, product, and place) on the long-term performance of mature brands, instead emphasizing advertising and price promotion. Thus, little guidance is available to firms regarding the relative efficacy of their various marketing expenditures over the long run. To investigate this issue, the authors apply a multivariate dynamic linear transfer function model to five years of advertising and scanner data for 25 product categories and 70 brands in France. The findings indicate that the total (short-term plus long-term) sales elasticity is 1.37 for product and .74 for distribution. Conversely, the total elasticities for advertising and discounting are only .13 and .04, respectively. This result stands in marked contrast to the previous emphasis in the literature on price promotions and advertising. The authors further find that the long-term effects of discounting are one-third the magnitude of the short-term effects. The ratio is reversed from other aspects of the mix (in which long-term effects exceed four times the short-term effects), underscoring the strategic role of these tools in brand sales.

text: The long-term effect of marketing strategy on brand sales. Few studies have considered the relative role of the integrated marketing mix (advertising, price promotion, product, and place) on the long-term performance of mature brands, instead emphasizing advertising and price promotion. Thus, little guidance is available to firms regarding the relative efficacy of their various marketing expenditures over the long run. To investigate this issue, the authors apply a multivariate dynamic linear transfer function model to five years of advertising and scanner data for 25 product categories and 70 brands in France. The findings indicate that the total (short-term plus long-term) sales elasticity is 1.37 for product and .74 for distribution. Conversely, the total elasticities for advertising and discounting are only .13 and .04, respectively. This result stands in marked contrast to the previous emphasis in the literature on price promotions and advertising. The authors further find that the long-term effects of discounting are one-third the magnitude of the short-term effects. The ratio is reversed from other aspects of the mix (in which long-term effects exceed four times the short-term effects), underscoring the strategic role of these tools in brand sales.

year: 2010

title: Mā hea (which way)? Mō te aha (what for)? Too many questions, not enough answers, for Māori on the march

authors: Te Awekotuku, Ngahuia

subjects: Aotearoa/New Zealand

abstract: This presentation will be in four sections. The first section introduces two major issues: mana motuhake, and mana tāngata, then we will consider some proposed legislation: the Foreshore and Seabed Bill and the Civil Union Bill. Then I will look at strategic Māori responses to political pressure over the last three decades and note two recent and dramatic examples – the Hīkoi Takutai Moana, April 2004, and the Enough is Enough Rally, August 2004. The final section considers the implications for psychologies and psychologists working today in Aotearoa.

text: Mā hea (which way)? Mō te aha (what for)? Too many questions, not enough answers, for Māori on the march This presentation will be in four sections. The first section introduces two major issues: mana motuhake, and mana tāngata, then we will consider some proposed legislation: the Foreshore and Seabed Bill and the Civil Union Bill. Then I will look at strategic Māori responses to political pressure over the last three decades and note two recent and dramatic examples – the Hīkoi Takutai Moana, April 2004, and the Enough is Enough Rally, August 2004. The final section considers the implications for psychologies and psychologists working today in Aotearoa.

year: 2012