title: Blind deconvolution of depth-of-field limited full-field lidar data by determination of focal parameters

authors: Godbaz, John Peter

subjects: lidar

abstract: We present a new two-stage method for parametric spatially variant blind deconvolution of full-field Amplitude Modulated Continuous Wave lidar image pairs taken at different aperture settings subject to limited depth of field. A Maximum Likelihood based focal parameter determination algorithm uses range information to reblur the image taken with a smaller aperture size to match the large aperture image. This allows estimation of focal parameters without prior calibration of the optical setup and produces blur estimates which have better spatial resolution and less noise than previous depth from defocus (DFD) blur measurement algorithms. We compare blur estimates from the focal parameter determination method to those from Pentland's DFD method, Subbarao's S-Transform method and estimates from range data/the sampled point spread function. In a second stage the estimated focal parameters are applied to deconvolution of total integrated intensity lidar images improving depth of field. We give an example of application to complex domain lidar images and discuss the trade-off between recovered amplitude texture and sharp range estimates.

text: Blind deconvolution of depth-of-field limited full-field lidar data by determination of focal parameters We present a new two-stage method for parametric spatially variant blind deconvolution of full-field Amplitude Modulated Continuous Wave lidar image pairs taken at different aperture settings subject to limited depth of field. A Maximum Likelihood based focal parameter determination algorithm uses range information to reblur the image taken with a smaller aperture size to match the large aperture image. This allows estimation of focal parameters without prior calibration of the optical setup and produces blur estimates which have better spatial resolution and less noise than previous depth from defocus (DFD) blur measurement algorithms. We compare blur estimates from the focal parameter determination method to those from Pentland's DFD method, Subbarao's S-Transform method and estimates from range data/the sampled point spread function. In a second stage the estimated focal parameters are applied to deconvolution of total integrated intensity lidar images improving depth of field. We give an example of application to complex domain lidar images and discuss the trade-off between recovered amplitude texture and sharp range estimates.

year: 2010

title: Jackson’s armchair: The only chair in town?

authors: Kingsbury, Justine

subjects: philosophy

abstract: Are all the facts about nations, cultures and economies really just facts about people's mental states and their interactions? Are all of the properties which determine whether or not a thing is a work of art really just physical properties of that thing? Is linguistics, the scientific investigation of language, best understood as a branch of psychology, the scientific investigation of the mind? Can psychology be reduced to biology? Can all biological phenomena be explained chemically? Is chemistry really just part of physics? Is there anything going on in the world which isn't a physical thing? Can there be freely-chosen, autonomous human action in a purely physical world? Frank Jackson has made a controversial claim about the way in which one should investigate questions like these. This paper is a qualified defence of that claim.

text: Jackson’s armchair: The only chair in town? Are all the facts about nations, cultures and economies really just facts about people's mental states and their interactions? Are all of the properties which determine whether or not a thing is a work of art really just physical properties of that thing? Is linguistics, the scientific investigation of language, best understood as a branch of psychology, the scientific investigation of the mind? Can psychology be reduced to biology? Can all biological phenomena be explained chemically? Is chemistry really just part of physics? Is there anything going on in the world which isn't a physical thing? Can there be freely-chosen, autonomous human action in a purely physical world? Frank Jackson has made a controversial claim about the way in which one should investigate questions like these. This paper is a qualified defence of that claim.

year: 2009

title: Cultural justice and ethics: From within

authors: Garner, Kerin

subjects: Maori

abstract: Where I eventually got a lot of support, awhi, aroha, was from the PPTA when I became a member of Te Huarahi and they helped to see me through the tears and the confusion. It wasn’t because I was Maori, it was because I was a human being. I think the process I have gone through is a process of becoming human, and becoming real in thinking; yes, my experience is valid. I’m not just Maori, I’m Pakeha too. I want both of them, I am both of them. I don’t have to get up and speak fluent Maori right now. Perhaps it will come. I hope it does because I want it to, and I’m going to work on it. But I do feel that people like me, and there are many of us, are not marginal. We are bridges between cultures. This diversity has to be acknowledged, honoured and respected.

text: Cultural justice and ethics: From within Where I eventually got a lot of support, awhi, aroha, was from the PPTA when I became a member of Te Huarahi and they helped to see me through the tears and the confusion. It wasn’t because I was Maori, it was because I was a human being. I think the process I have gone through is a process of becoming human, and becoming real in thinking; yes, my experience is valid. I’m not just Maori, I’m Pakeha too. I want both of them, I am both of them. I don’t have to get up and speak fluent Maori right now. Perhaps it will come. I hope it does because I want it to, and I’m going to work on it. But I do feel that people like me, and there are many of us, are not marginal. We are bridges between cultures. This diversity has to be acknowledged, honoured and respected.

year: 1993