How about a visual lecture? : viewers' interpretations of a visual-pedagogical installation challenging family photography. '¿Qué tal una clase visual? : las interpretaciones de los espectadores de una instalación visual-pedagógica que cuestiona la fotografía de familia'.

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Extraction of tidal channel networks from airborne scanning laser altimetry and aerial photography

The study of the morphodynamics of tidal channel networks is important because of their role in tidal propagation and the evolution of salt-marshes and tidal flats. Channel dimensions range from tens of metres wide and metres deep near the low water mark to only 20-30cm wide and 20cm deep for the smallest channels on the marshes. The conventional method of measuring the networks is cumbersome, involving manual digitising of aerial photographs. This paper describes a semi-automatic knowledge-based network extraction method that is being implemented to work using airborne scanning laser altimetry (and later aerial photography). The channels exhibit a width variation of several orders of magnitude, making an approach based on multi-scale line detection difficult. The processing therefore uses multi-scale edge detection to detect channel edges, then associates adjacent anti-parallel edges together to form channels using a distance-with-destination transform. Breaks in the networks are repaired by extending channel ends in the direction of their ends to join with nearby channels, using domain knowledge that flow paths should proceed downhill and that any network fragment should be joined to a nearby fragment so as to connect eventually to the open sea.

3D face computational photography using PCA spaces

In this paper, we present a 3D face photography system based on a facial expression training dataset, composed of both facial range images (3D geometry) and facial texture (2D photography). The proposed system allows one to obtain a 3D geometry representation of a given face provided as a 2D photography, which undergoes a series of transformations through the texture and geometry spaces estimated. In the training phase of the system, the facial landmarks are obtained by an active shape model (ASM) extracted from the 2D gray-level photography. Principal components analysis (PCA) is then used to represent the face dataset, thus defining an orthonormal basis of texture and another of geometry. In the reconstruction phase, an input is given by a face image to which the ASM is matched. The extracted facial landmarks and the face image are fed to the PCA basis transform, and a 3D version of the 2D input image is built. Experimental tests using a new dataset of 70 facial expressions belonging to ten subjects as training set show rapid reconstructed 3D faces which maintain spatial coherence similar to the human perception, thus corroborating the efficiency and the applicability of the proposed system.

Photography and christian mission: George Brown`s images of the New Britain mission 1875-80

In 1875, Methodist George Brown arrived in the Bismarck Archipelago to establish the New Britain Mission. Based in the Duke of York Islands, Brown's territory covered New Ireland and the Gazelle Peninsula of New Britain. The mission was one of the first to be photographed from its inception. The Australian Museum holds 96 plates from the first five years of the mission. Brown's photographs are a visual record of conditions and peoples of the time. Analysed in relation to Brown's writings they are indicative of the relationships and bonds established through photography both in the mission field and across wider scientific and church audiences. The methodology employed here also challenges the kinds of interpretations of photographs that can arise from visual analyses relying solely on the caption and the posing of the subject.

Sports training, science and class among British amateur athletes in the mid to late nineteenth century

Organised amateur sports emerged in the second half of the nineteenth century. This paper, an exercise in historical sociology, analyses how a new system of sports training was devised by the amateurs to meet their particular needs. The data comes from contemporary British training manuals and the analysis is informed by the theories of Bourdieu and Foucault. That amateurs came from the higher social classes was highly
significant: it meant that they could not adopt existing training practices because these were associated with plebeian professional athletes. For amateurs to have followed the preparation of the professionals would have placed their bodies under the control of a social inferior and promoted a somatic shape more in keeping with the lower than with
the higher social orders. Mirroring the social distance between them, amateurs came to stridently reject professional training practices. Instead, they devised new training techniques which were justified through recourse to contemporary bio-medical knowledge. It is argued that amateur training originated for social reasons, with the proponents’ class positions and social capital facilitating the evocation of scientific knowledge as a legitimating ideology.

Train without strain : health and amateur athletes

An exercise in historical sociology, this paper investigates the association between training and health made by amateur athletes between about 1860 and WWI. It examines the idea that while exercise benefited a person’s health and well-being, excessive exertion caused potentially life-threatening ‘strain’. The paper sets out the interpretation of contemporary scientific knowledge about the body–which the author terms the ‘physiology of strain’–that underpinned the advice given to those undergoing a training program for amateur competition. The point is made that the imputed effects of exercise on health were deduced from this scientific knowledge; it did not derive from bio-medical investigations specifically addressing these issues. Amateur athletes included people drawn from the professionally educated elite and medical practitioners figured significantly among them. Using insights from Bourdieu and Foucault, it is argued that their social power and professional connections served to legitimate their interpretation of the physiological effects of exercise (denying the value of the training practices of working class professional athletes) and cemented the physiology of strain as a ‘factual’ statement about exercise and health until well into the twentieth century. The data for the paper comes from training manuals, medical journals and other contemporary publications.