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High Dynamic-Range Image Sensor
http://tinyurl.com/gvunpuw
"A pixel array within an integrated-circuit image sensor is exposed to light representative of a scene during a first frame interval and then oversampled a first number of times within the first frame interval to generate a corresponding first number of frames of image data from which a first output image may be constructed. One or more of the first number of frames of image data are evaluated to determine whether a range of luminances in the scene warrants adjustment of an oversampling factor from the first number to a second number, if so, the oversampling factor is adjusted such that the pixel array is oversampled the second number of times within a second frame interval to generate a corresponding second number of frames of image data from which a second output image may be constructed." -- Regards, Eric Stevens |
#2
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High Dynamic-Range Image Sensor
On 08/11/2016 11:27, Eric Stevens wrote:
http://tinyurl.com/gvunpuw "A pixel array within an integrated-circuit image sensor is exposed to light representative of a scene during a first frame interval and then oversampled a first number of times within the first frame interval to generate a corresponding first number of frames of image data from which a first output image may be constructed. One or more of the first number of frames of image data are evaluated to determine whether a range of luminances in the scene warrants adjustment of an oversampling factor from the first number to a second number, if so, the oversampling factor is adjusted such that the pixel array is oversampled the second number of times within a second frame interval to generate a corresponding second number of frames of image data from which a second output image may be constructed." Not very "innovative" IMO, and probably just patent trolling. |
#3
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High Dynamic-Range Image Sensor
On Tue, 8 Nov 2016 12:06:29 +1300, Me wrote:
On 08/11/2016 11:27, Eric Stevens wrote: http://tinyurl.com/gvunpuw "A pixel array within an integrated-circuit image sensor is exposed to light representative of a scene during a first frame interval and then oversampled a first number of times within the first frame interval to generate a corresponding first number of frames of image data from which a first output image may be constructed. One or more of the first number of frames of image data are evaluated to determine whether a range of luminances in the scene warrants adjustment of an oversampling factor from the first number to a second number, if so, the oversampling factor is adjusted such that the pixel array is oversampled the second number of times within a second frame interval to generate a corresponding second number of frames of image data from which a second output image may be constructed." Not very "innovative" IMO, and probably just patent trolling. I hjaven't heard of anyone actually putting this into practice the way the patent describes (but that doesn't mean much). Rambus is not a patent troll, although they have been accused of that in the past. -- Regards, Eric Stevens |
#4
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High Dynamic-Range Image Sensor
Wouldn't it be simpler and faster to take two exposures, one
underexposed and one overexposed, and combine them in camera to generate a high dynamic range RAW? -- Alfred Molon Olympus E-series DSLRs and micro 4/3 forum at http://tech.groups.yahoo.com/group/MyOlympus/ http://myolympus.org/ photo sharing site |
#5
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High Dynamic-Range Image Sensor
On Tue, 8 Nov 2016 18:55:36 +0100, Alfred Molon
wrote: Wouldn't it be simpler and faster to take two exposures, one underexposed and one overexposed, and combine them in camera to generate a high dynamic range RAW? This seems to be just another way of doing just that with the sensor/processor outputting but a single raw file which covers the dynamic range. Think of it as just another step up on autoexposure. -- Regards, Eric Stevens |
#6
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High Dynamic-Range Image Sensor
On 2016-11-08 22:17:29 +0000, Eric Stevens said:
On Tue, 8 Nov 2016 18:55:36 +0100, Alfred Molon wrote: Wouldn't it be simpler and faster to take two exposures, one underexposed and one overexposed, and combine them in camera to generate a high dynamic range RAW? This seems to be just another way of doing just that with the sensor/processor outputting but a single raw file which covers the dynamic range. Think of it as just another step up on autoexposure. Why not just develop a 32-bit sensor? -- Regards, Savageduck |
#7
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High Dynamic-Range Image Sensor
On Tue, 8 Nov 2016 14:41:16 -0800, Savageduck
wrote: On 2016-11-08 22:17:29 +0000, Eric Stevens said: On Tue, 8 Nov 2016 18:55:36 +0100, Alfred Molon wrote: Wouldn't it be simpler and faster to take two exposures, one underexposed and one overexposed, and combine them in camera to generate a high dynamic range RAW? This seems to be just another way of doing just that with the sensor/processor outputting but a single raw file which covers the dynamic range. Think of it as just another step up on autoexposure. Why not just develop a 32-bit sensor? That would not overcome the inherent limits to the dynamic range of whatever sensor technology they were using. The patent describes a way of constructing a HDR image from within whatever limits the sensor might have. -- Regards, Eric Stevens |
#8
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High Dynamic-Range Image Sensor
On Wed, 9 Nov 2016 01:51:56 -0800 (PST), Whisky-dave
wrote: On Tuesday, 8 November 2016 22:41:24 UTC, Savageduck wrote: On 2016-11-08 22:17:29 +0000, Eric Stevens said: On Tue, 8 Nov 2016 18:55:36 +0100, Alfred Molon wrote: Wouldn't it be simpler and faster to take two exposures, one underexposed and one overexposed, and combine them in camera to generate a high dynamic range RAW? This seems to be just another way of doing just that with the sensor/processor outputting but a single raw file which covers the dynamic range. Think of it as just another step up on autoexposure. Why not just develop a 32-bit sensor? -- Regards, Savageduck Maybe they havent; got the processing power to sample all those bits in a reasonable amount of time maybe in a few years time. Very possibly true. Rambus have a habit of being way ahead of current technology when developing their concepts. But they have to be able to build a working model when they file for patents but it doesn't have to be practicable or commercially viable at that time. -- Regards, Eric Stevens |
#9
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High Dynamic-Range Image Sensor
On 11/10/2016 4:48 AM, Whisky-dave wrote:
On Wednesday, 9 November 2016 20:26:20 UTC, Eric Stevens wrote: On Wed, 9 Nov 2016 01:51:56 -0800 (PST), Whisky-dave wrote: On Tuesday, 8 November 2016 22:41:24 UTC, Savageduck wrote: On 2016-11-08 22:17:29 +0000, Eric Stevens said: On Tue, 8 Nov 2016 18:55:36 +0100, Alfred Molon wrote: Wouldn't it be simpler and faster to take two exposures, one underexposed and one overexposed, and combine them in camera to generate a high dynamic range RAW? This seems to be just another way of doing just that with the sensor/processor outputting but a single raw file which covers the dynamic range. Think of it as just another step up on autoexposure. Why not just develop a 32-bit sensor? -- Regards, Savageduck Maybe they havent; got the processing power to sample all those bits in a reasonable amount of time maybe in a few years time. Very possibly true. Rambus have a habit of being way ahead of current technology when developing their concepts. But they have to be able to build a working model when they file for patents but it doesn't have to be practicable or commercially viable at that time. Yep, nike patented self tying laces in 2008 released in 2016 limited edition I think, I'm not joining the queue for them. I'll wait for the IoT version so I can tie them using a smartphone :-) There have been many mornings when I wish I had them on all of my shoes. -- PeterN |
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