phototechedu day 30: imaging optics for next decade
54:48
Google Tech Talks
November, 7 2007
Digital cameras in their many forms will continue to be one of the
primary drivers towards new technologies in optics as well as
improvements of classical technologies. This has been well illustrated
in the past 5-10 years which has seen, for example, the development of
compression molded glass aspheric lenses for improved performance and
packaging. The incorporation of injection molded plastic lenses and
possibly hybrid refractive/diffractive surfaces will grow.
Furthermore, as the trend continues towards smaller pixels as well as
more pixels in a given sensor, the imaging optics will be further
driven towards higher image quality. Zoom lenses will increase in
their zoom range, yet there will be a continuing emphasis towards
smaller and smaller packaging. The optics and their associated
mechanics will need to be more robust with respect to stray light such
as flare, glare, ghost images, and other undesirable image anomalies.
And our optics must be more robust with respect to environmental
effects such as thermal soaks and gradients. And with all of the
above, customers will want lower cost too. It is going to be a fun
ride over the next 5-10 years so fasten your seat belt and hold on
real tight to the safety bar!
Speaker: Robert E. Fischer, CEO OPTICS 1, Inc. Westlake Village, CA
Bob Fisher is CEO of Optics 1, a past president of the SPIE, and a
winner of that society's highest award, the Gold Medal for outstanding
engineering or scientific accomplishments in optics andelectro-optics.
Mr. Fischer's technical interests are in optical system design and
engineering, in particular lens design. He is also interested in
optical component and system manufacturing, assembly, and testing.
His interests extend from the deep UV through the visible and on to
the thermal infrared. He is known for his tireless efforts to advance
optical science, engineering and scholarship. He served as a book
editor of the McGraw-Hill Series on Optical and Electro-Optical
Engineering, and as executive editor of OE Reports, bringing timely
and practical information to professionals in the field. タグ:googletechtalkstechtalkengedutalktalks 投稿日: November 22, 2007, 7:19 pm 閲覧数: 4454 投票: 4.60(５点満点) 10 人の平均
some statistical problems in spectroscopy and hyperspectral imaging
58:50
Google Tech Talks
July 23, 2008
ABSTRACT
Every material has a distinctive spectrum. The spectrum of a material tells us about its chemistry. Hyperspectral images produce a spectrum (represented as several hundred numbers) at each pixel in an image. So hyperspectral images enable us to map variations in chemistry.
The first hyperspectral scanners, built in the 1980's and 1990's, were designed for airborne applications, primarily for mineral, environmental and military applications. However, in recent years, hyperspectral microscopes and cameras have been developed and are being used for terrestrial applications in areas such as medical diagnosis, burns analysis and skin cancer, biosecurity, pharmaceuticals, forensics and in agribusiness.
A significant issue in hyperspectral imaging is that the spectra at many pixels in an image are actually mixtures of the spectra of the pure ingredients. My main focus over a number of years has been on developing fast and sophisticated algorithms and software for "unmixing" these spectra into their pure ingredients, both when the pure ingredients are known and when they are unknown. This has resulted in two software packages:
The Spectral Assistant (TSA), which has been incorporated into another CSIRO package, The Spectral Geologist, which itself has been sold to over 100 (mainly exploration and mining) companies around the world; and Iterated Constrained Endmembers (ICE), which has yet to be commercialized.
I will give an overview of the algorithms underlying TSA and ICE, and demonstrate their application to some mineral, remotely sensing and biological data sets. Finally, I will discuss some unsolved statistical and computational problems associated with these packages.
Speaker: Mark Berman
Mark Berman received the B.Sc.(Hons.) degree and University Medal in mathematical statistics from the University of New South Wales in 1974, and the Master of Statistics degree from the same institution in 1976. In 1978, he was awarded the Ph.D. and D.I.C. degrees in mathematical statistics by the Imperial College of Science and Technology, London.
He was a visiting lecturer in the Department of Statistics at the University of California, Berkeley during 1978-1979. Most of his time since then has been with the CSIRO Division of Mathematical and Information Sciences (CMIS), Sydney, where he is now a Chief Research Scientist. He led CMIS' Image Analysis Group from 1989 to 2000. He spent 1988 at the Melbourne Research Laboratories of Broken Hill Proprietary Ltd. where he established the Image Processing and Data Analysis Group. His research interests are in image analysis (especially hyperspectral), spectroscopy and spatial data analysis.
Since 2007, Dr. Berman has been working part time at CMIS. During this period, he has also given Ph.D courses in spectroscopy and hyperspectral image analysis at the Technical University of Denmark and Stanford University. タグ:googletechtalkstechtalkengedutalktalks 投稿日: July 26, 2008, 6:06 pm 閲覧数: 2170 投票: 5.00(５点満点) 5 人の平均
phototechedu day 8: diffraction and interference in imaging
54:46
Google Tech Talks
March 14, 2007
ABSTRACT
Photographic Technology Day 8: This session addresses effects of the wave nature of light. This approach will allow us to talk about the phenomena of interference as well as diffraction. The understanding of the notion of diffraction will be used to determine the Rayleigh criteria and finally the resolving power of an optical system. In the second part of the lecture, we will study gratings using the wave approach. An example of an amateur spectroscope for astronomy using a reflective grating will be shown. Credits: Speaker:Rom Clement タグ:googlehowtophototechedudaydiffraction 投稿日: October 9, 2007, 10:06 am 閲覧数: 2466 投票: 5.00(５点満点) 2 人の平均
imaging resource at pma 2007:sigma 200-500mm f/2.8 lens
2:28
Dave Etchells talks to Tom Sobey of Sigma about the new APO 200 - 500mm f/2.8 EX DG telephoto lens. See more PMA 2007 coverage at imaging-resource.com タグ:resourcepmasigmatelephotolens 投稿日: March 14, 2007, 7:53 am 閲覧数: 87134 投票: 4.80(５点満点) 71 人の平均
5:00
intuitive desktop digital imaging with multi touch screen. new gestures and interface design. fourth semester project in new media at hfg schwäbisch gmünd. projet partners: jens franke, wera reinhardt, thomas gläser タグ:intuitivemultitouchimagingdesktopdigitmulti-touchphotoshop 投稿日: February 12, 2007, 9:55 pm 閲覧数: 37627 投票: 4.50(５点満点) 32 人の平均
imaging resource pma 2008 - fujifilm
6:47
Andrew talks to Jim Calverly of Fujifilm USA, who showed us three of Fujifilm's newest digital still cameras. タグ:fujifilmfujicameraspma2008camera 投稿日: February 2, 2008, 1:42 pm 閲覧数: 9220 投票: 0.00(５点満点) 0 人の平均
imaging resource at photokina 2006: fujifilm インタビュー
imaging resource at pma 2007: canon eos 1d mark iii
7:26
Shawn Barnett talks to Chuck Westfall of Canon USA about the new Mark III and the 580 EX II flash. See more footage of new products announced at PMA 2007 at imaging-resource.com タグ:resourcepmacanond1mark 投稿日: March 9, 2007, 7:15 pm 閲覧数: 29907 投票: 4.90(５点満点) 28 人の平均
