tag:blogger.com,1999:blog-19092890.post7933789587827178669..comments2024-03-28T17:41:43.970+02:00Comments on Image Sensors World: Holy Grail Claim: Perfect RGB‐IR Color Routers Instead of Color FiltersVladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger19125tag:blogger.com,1999:blog-19092890.post-29557926339962499922020-11-26T09:08:05.442+02:002020-11-26T09:08:05.442+02:00Maybe all your arguments are correct, but you woul...Maybe all your arguments are correct, but you would be surprised to see the very first attempts made with on-chip colour filters. The results were also very bad in comparison to what we have these days. Over time also this technology can further improve, hopefully ;-)Albert Theuwissen - Harvest Imagingnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-2627469121231398092020-11-26T00:40:02.864+02:002020-11-26T00:40:02.864+02:00the way they did may work for color separation , b...the way they did may work for color separation , but the structure itself is very complicated to achieve in any of current process. another thing is that uniformity of image sensor nowadays requires less than 0.5% error, I cannot imaging how can they get this number if using this method.magskyichttps://www.blogger.com/profile/01863338961197365344noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-89060475818905847592020-11-22T05:54:56.925+02:002020-11-22T05:54:56.925+02:00any image sensor who detect the pest and insect in...any image sensor who detect the pest and insect in agriculture field ?Anonymoushttps://www.blogger.com/profile/07072700918187799347noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-67555498716298498592020-11-20T23:57:46.968+02:002020-11-20T23:57:46.968+02:00Yes, 2x for photon counting sensors and sqrt(2) = ...Yes, 2x for photon counting sensors and sqrt(2) = 1.4x for CISTripurari Singhhttps://www.blogger.com/profile/05553763342710161951noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-72976957499902068752020-11-19T22:06:19.192+02:002020-11-19T22:06:19.192+02:00So, using the old SNR10 figure of merit, what woul...So, using the old SNR10 figure of merit, what would be a difference in lux? 2x?Vladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-26546231296210863252020-11-19T21:44:27.489+02:002020-11-19T21:44:27.489+02:00This is a great advance for photon counting sensor...This is a great advance for photon counting sensors, but is likely to be only slightly more sensitive than RGBW on a CIS in a non-IR, visible color-only setting. <br /><br />This is because luminance at each pixel in the proposed design will be contaminated by the read noise from 3 photosites whereas the corresponding W pixel in RGBW will suffer read noise from only 1 photosite. Only half the pixels in RGBW, on the other hand, are W and the demosaicker injects a small fraction of the RGB pixel noise into luminance.<br /><br />The low light SNR advantage over RGBW is likely to be 1.5dB on CIS and 3dB on QIS/other photon counting sensors.<br />Tripurari Singhhttps://www.blogger.com/profile/05553763342710161951noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-50789887239894122572020-11-18T22:21:53.549+02:002020-11-18T22:21:53.549+02:00With these being sub-wavelength sized, then a line...With these being sub-wavelength sized, then a linear cell that is smaller than the diffraction-limited point spread function is fine.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-80956463597211191152020-11-18T21:26:54.661+02:002020-11-18T21:26:54.661+02:00Thanks, I looked. It appears they don't discus...Thanks, I looked. It appears they don't discuss anything beyond a row of four pixels. Seems to me it would make more sense to build these in a 2x2 block. The distance the wavefronts have to span would be shorter and the blocks could be repeated and optically isolated.Dave Gilblomhttp://www.maxwell-hiqe.comnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-87559316259803054612020-11-18T20:55:14.510+02:002020-11-18T20:55:14.510+02:00What happens to the photons that are not captured?...What happens to the photons that are not captured? If they are mostly absorbed it's one thing, but if they are reflected back out it can be a major issue. Even a small percentage of reflection off the sensor can result in disastrous flare in high dynamic range scenes.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-74880715800133025642020-11-18T20:53:30.336+02:002020-11-18T20:53:30.336+02:00The example shwon on the diagram is using normally...The example shwon on the diagram is using normally incident light on the pixels, wonder what the crosstalk performance will be for light incident at oblique angles ?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-2419392193401338052020-11-18T20:19:37.906+02:002020-11-18T20:19:37.906+02:00Please correct me if I am wrong. But wouldn't ...Please correct me if I am wrong. But wouldn't the scene information get all mixed up using this mechanism. In the diagram it clearly shows that light that was intended for a pixel is sent to a pixel 2 pixel over. I see this posing MTF challenges. Also AF performance might get adversly affected too.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-14310485974574983052020-11-18T18:35:29.236+02:002020-11-18T18:35:29.236+02:00There is no free lunch (except maybe for Foveon ap...There is no free lunch (except maybe for Foveon approach): It does not work for low f/#. <br />"We find that the response remains above 70% and 60% of<br />normal incidence performance for lens apertures down to f/4.0 and f/2.8, respectively."<br /><br />In general, it is hard to make diffractive elements perform over large ranges of wavelength and angle.<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-28118476165365857292020-11-18T15:04:21.140+02:002020-11-18T15:04:21.140+02:00The paper is in open access. You are supposed to b...The paper is in open access. You are supposed to be able to get a pdf of it:<br /><br />https://onlinelibrary.wiley.com/doi/pdf/10.1002/adpr.202000048Vladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-15260342638019724532020-11-18T14:32:57.667+02:002020-11-18T14:32:57.667+02:00I can't see the whole paper so maybe this ques...I can't see the whole paper so maybe this question is unnecessary but here it is. The illustrations show a one-dimensional effect. Is this really two-dimensional so the routing can only be done into lines of same-colored pixels or is it really one-dimensional so each line of pixels can have a different routing matrix? In fact, since only one set of four pixels is shown, maybe it is really zero-dimensional and it only works in isolation for a single set of four pixels and another set needs to be far away. Maybe the authors can comment.Dave Gilblomhttp://www.maxwell-hiqe.comnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-62160353452393801832020-11-18T13:15:49.450+02:002020-11-18T13:15:49.450+02:00Let me ask you a question.
Is this result a simula...Let me ask you a question.<br />Is this result a simulation?<br />Also, when actually making a color router, how much pixel size<br />Is it possible to process it?Anonymoushttps://www.blogger.com/profile/10716427104939495398noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-32840633284441645092020-11-18T10:27:14.139+02:002020-11-18T10:27:14.139+02:00It only works with small pixels and can't be e...It only works with small pixels and can't be extended to the large ones. At least, not easily extended.<br /><br />However, the sensitivity boost for small pixels is huge. This can ignite another round of pixel size race.Vladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-34183243751749161462020-11-18T08:44:36.897+02:002020-11-18T08:44:36.897+02:00You are right. Fixed now. Thank you.You are right. Fixed now. Thank you.Vladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-76844492602413421802020-11-18T02:29:29.522+02:002020-11-18T02:29:29.522+02:00It seems all figure captions are located above the...It seems all figure captions are located above the corresponding figures, instead of below. Therefore, the posted figures and captions are mixed up. For example, the caption for Figure 2 appears with Figure 1, but the correct caption for Figure 1 is not posted. PlainHearthttps://www.blogger.com/profile/07658922005147377317noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-34114713202414792632020-11-18T00:31:02.081+02:002020-11-18T00:31:02.081+02:00Any obvious downsides to this? Any obvious downsides to this? Anonymousnoreply@blogger.com