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From: Rich on 20 Feb 2010 02:57 I'll believe this claim when I see it. http://www.eoshd.com/entry.php?29-Panasonic-engineer-reveals-workings-of- GH2-dual-exposure-sensor Here are the key points: * Panasonic have developed a 4K x 2K image sensor (approx. 12 megapixel) based on 'dual exposure technique' * The sensor is described as having new architecture that tries to improve sensitivity by a factor of 4 or more * The architecture change is a new design which allows green pixels to be read independently of the blue and red ones on the sensor. * The green pixels are exposed 4 times longer than the red and blue, thus achieving the sensitivity gain * Motion artifacts are introduced as a result, but clever signal processing of the red and blue channels corrects the motion artifacts introduced in the green channel by the long exposure * Red and blue channel gain achieved by pixel binning in 4x4 mode The technique is similar to the Intelligent Resolution feature of the new Panasonic TZ10 sensor, but on a larger scale. A factor of 4 increase in sensitivity will allow the Micro 4/3rds camera to surpass the full frame Canon 5DMkII. GH2 is currently slated for a September release date
From: Doug Jewell on 20 Feb 2010 03:26 Rich wrote: > I'll believe this claim when I see it. > > http://www.eoshd.com/entry.php?29-Panasonic-engineer-reveals-workings-of- > GH2-dual-exposure-sensor > > Here are the key points: > > * Panasonic have developed a 4K x 2K image sensor (approx. 12 > megapixel) based on 'dual exposure technique' > * The sensor is described as having new architecture that tries to > improve sensitivity by a factor of 4 or more > * The architecture change is a new design which allows green pixels > to be read independently of the blue and red ones on the sensor. > * The green pixels are exposed 4 times longer than the red and blue, > thus achieving the sensitivity gain > * Motion artifacts are introduced as a result, but clever signal > processing of the red and blue channels corrects the motion artifacts > introduced in the green channel by the long exposure > * Red and blue channel gain achieved by pixel binning in 4x4 mode > > > The technique is similar to the Intelligent Resolution feature of the new > Panasonic TZ10 sensor, but on a larger scale. > > A factor of 4 increase in sensitivity will allow the Micro 4/3rds camera > to surpass the full frame Canon 5DMkII. GH2 is currently slated for a > September release date You forget of course, that if this technology is really as good as it sounds, and makes a 4/3 sensor as sensitive as a current 24x36 sensor, that the same technology can be applied to a 24x36 sensor making it once again better than a 4/3 sensor. No matter which way you look at it, smaller sensors will always be behind large sensors. They may make momentary gains during the early implementation phase of a new technology, but as soon as that technology is applied to the larger sensor, it will leap ahead again. A larger sensor can have larger photosites for better dynamic range and lower noise, more photosites for better spatial resolution, or a combination of both. -- What is the difference between a duck?
From: ron_tom on 20 Feb 2010 06:17 On Sat, 20 Feb 2010 18:26:00 +1000, Doug Jewell <ask(a)and.maybe.ill.tell.you> wrote: >Rich wrote: >> I'll believe this claim when I see it. >> >> http://www.eoshd.com/entry.php?29-Panasonic-engineer-reveals-workings-of- >> GH2-dual-exposure-sensor >> >> Here are the key points: >> >> * Panasonic have developed a 4K x 2K image sensor (approx. 12 >> megapixel) based on 'dual exposure technique' >> * The sensor is described as having new architecture that tries to >> improve sensitivity by a factor of 4 or more >> * The architecture change is a new design which allows green pixels >> to be read independently of the blue and red ones on the sensor. >> * The green pixels are exposed 4 times longer than the red and blue, >> thus achieving the sensitivity gain >> * Motion artifacts are introduced as a result, but clever signal >> processing of the red and blue channels corrects the motion artifacts >> introduced in the green channel by the long exposure >> * Red and blue channel gain achieved by pixel binning in 4x4 mode >> >> >> The technique is similar to the Intelligent Resolution feature of the new >> Panasonic TZ10 sensor, but on a larger scale. >> >> A factor of 4 increase in sensitivity will allow the Micro 4/3rds camera >> to surpass the full frame Canon 5DMkII. GH2 is currently slated for a >> September release date >You forget of course, that if this technology is really as >good as it sounds, and makes a 4/3 sensor as sensitive as a >current 24x36 sensor, that the same technology can be >applied to a 24x36 sensor making it once again better than a >4/3 sensor. > >No matter which way you look at it, smaller sensors will >always be behind large sensors. They may make momentary >gains during the early implementation phase of a new >technology, but as soon as that technology is applied to the >larger sensor, it will leap ahead again. > >A larger sensor can have larger photosites for better >dynamic range and lower noise, more photosites for better >spatial resolution, or a combination of both. What planet are you living on? What's the color of the sky in your world? Technological innovations in sensor technology are *always* applied to small sensor cameras first. It is only 1-3 years later where those innovations are then applied to larger sensors. Catch up!
From: Geoff G on 20 Feb 2010 06:38 On Sat, 20 Feb 2010 18:26:00 +1000, Doug Jewell <ask(a)and.maybe.ill.tell.you> wrote: >Rich wrote: >> I'll believe this claim when I see it. >> >> http://www.eoshd.com/entry.php?29-Panasonic-engineer-reveals-workings-of- >> GH2-dual-exposure-sensor >> >> Here are the key points: >> >> * Panasonic have developed a 4K x 2K image sensor (approx. 12 >> megapixel) based on 'dual exposure technique' >> * The sensor is described as having new architecture that tries to >> improve sensitivity by a factor of 4 or more >> * The architecture change is a new design which allows green pixels >> to be read independently of the blue and red ones on the sensor. >> * The green pixels are exposed 4 times longer than the red and blue, >> thus achieving the sensitivity gain >> * Motion artifacts are introduced as a result, but clever signal >> processing of the red and blue channels corrects the motion artifacts >> introduced in the green channel by the long exposure >> * Red and blue channel gain achieved by pixel binning in 4x4 mode >> >> >> The technique is similar to the Intelligent Resolution feature of the new >> Panasonic TZ10 sensor, but on a larger scale. >> >> A factor of 4 increase in sensitivity will allow the Micro 4/3rds camera >> to surpass the full frame Canon 5DMkII. GH2 is currently slated for a >> September release date >You forget of course, that if this technology is really as >good as it sounds, and makes a 4/3 sensor as sensitive as a >current 24x36 sensor, that the same technology can be >applied to a 24x36 sensor making it once again better than a >4/3 sensor. > >No matter which way you look at it, smaller sensors will >always be behind large sensors. They may make momentary >gains during the early implementation phase of a new >technology, but as soon as that technology is applied to the >larger sensor, it will leap ahead again. > >A larger sensor can have larger photosites for better >dynamic range and lower noise, more photosites for better >spatial resolution, or a combination of both. All fine and well, but as for as real-world production goes, the larger sensor will always be 1-3 years behind the technological development of the smaller sensor. If you are willing to live and wait with that, more power to you! In the meantime, the smaller sensor technology will still be surpassing your larger sensor technology by a good 2-3 years. Sucks to be an early-adopter if you are a large-sensor extremophile.
From: c_atiel on 20 Feb 2010 13:50
The last major hurdle of digital image capture is exposure latitude. Even the best digital sensors still have very little latitude for over exposure. This is compensated for/disguised by improvements in sensor noise that allow the signal from relatively underexposed areas to be amplified. Presumably readers here understand that is why you shoot in raw mode for optimal results. I personally believe that the concept behind Fuji sensors that mix image capture cells of different sensitivities on the same sensor and use sophisticated processing algorithms to blend the data is the way to go. This system has worked very well for mammalian retinae and brains for quite a while. Sadly, many primates do not seem to use the brain part very well. --- news://freenews.netfront.net/ - complaints: news(a)netfront.net --- |