tag:blogger.com,1999:blog-19092890.post5377481761705726790..comments2024-03-19T08:15:45.946+02:00Comments on Image Sensors World: DxOMark Puzzled by Red Helium 8K Sensor ScoreVladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger15125tag:blogger.com,1999:blog-19092890.post-19175181230289329202019-09-22T11:27:15.643+03:002019-09-22T11:27:15.643+03:00Forza Silicon.Forza Silicon.scubatronixhttps://www.blogger.com/profile/01133497051560079869noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-45546320080057486102017-03-29T14:41:12.815+03:002017-03-29T14:41:12.815+03:00Since Guy Meynants (CMOSIS) is asking about the SN...Since Guy Meynants (CMOSIS) is asking about the SNR vs grayscale plot. I would assume not.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-10152709094716357332017-03-27T23:14:38.590+03:002017-03-27T23:14:38.590+03:00The RED is never in the full performance database,...The RED is never in the full performance database, which is fishy IMHO.<br /><br />Also, the RED competition is not tested by DXO. What if Red is two stops better than a $400 usd still camera in video mode. How does it compare to ARRI? :)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-45234647131534261242017-02-05T23:43:31.294+02:002017-02-05T23:43:31.294+02:00Yes. Sure. But quite not fair, when comparing SONI...Yes. Sure. But quite not fair, when comparing SONIKON and now even the Helium sensor. Canon for the first time in 5D4 presented CMOS with amps and ADCs all on the sensor, and since Dx0 measures only the "sensor (without the image processor) performance - Canon was always meant to be last before this last DSRL model in the CMOS performance competition. :/<br /><br />Isn't CMOSIS the vendor of this 8K sensor? Dikohttps://www.blogger.com/profile/09240289206928706940noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-78246588473498204512017-01-14T08:47:03.418+02:002017-01-14T08:47:03.418+02:00Yes, i have used a small fan with painted white bl...Yes, i have used a small fan with painted white blades to see the TNR effect. The blur of the blades with TNR enabled will appear more choppy than with it off. Unknownhttps://www.blogger.com/profile/15407481251921772152noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-65518661552681483622017-01-14T00:30:44.529+02:002017-01-14T00:30:44.529+02:00Temporal noise reduction can be easily defeated by...Temporal noise reduction can be easily defeated by flickering objects. You can devise an object that switches from one gray-level to another fast enough. A single frame captured under such condition should not be touched by temporal NR. Otherwise, some intermediate level is seen and it means temporal NR worked in some wrong way.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-87863657395060554612017-01-12T16:33:23.415+02:002017-01-12T16:33:23.415+02:00No, those were two separate thoughts. One regardi...No, those were two separate thoughts. One regarding performance of image sensors and one a side comment about DxO in the past.Eric R Fossumhttps://www.blogger.com/profile/09740612324630105312noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-1211949997556126092017-01-12T15:36:32.697+02:002017-01-12T15:36:32.697+02:00Eric, are you insisting that DxO has done the desi...Eric, are you insisting that DxO has done the design of the sensor ? If so, then I think you are not right, DxO is not a design house to my knowledge. Their primary business is software algorithms I think.Albert Theuwissen - Harvest Imagingnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-41005296849353656372017-01-12T15:04:01.004+02:002017-01-12T15:04:01.004+02:00If it is due to to better CMOS design how do you e...If it is due to to better CMOS design how do you explain the +6dB increase in SNR over leading FF sensor such as the A7Rii? There is no room for such gain with QE unless the colour separation is compromised, a non-Bayer array is used, or most probable..there is some yet undetected NR<br /><br />https://www.dxomark.com/var/ezwebin_site/storage/images/media/images/red_helium_weapon_8k__sony_a7r_ii__snr_print__920/156285-1-eng-US/RED_Helium_Weapon_8K__Sony_a7R_II__SNR_Print__920.pngAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-67393297953183896282017-01-12T13:13:28.019+02:002017-01-12T13:13:28.019+02:00It would be interesting to see the SNR vs. graysca...It would be interesting to see the SNR vs. grayscale plot that DXO also measures. Maybe the answer is in there. The RED is not yet in DXO's public database.Guy Meynantshttps://www.blogger.com/profile/08681499907325206298noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-27403509755525461302017-01-12T12:40:23.133+02:002017-01-12T12:40:23.133+02:00There is also a fair chance that the designers of ...There is also a fair chance that the designers of this sensor are better at CMOS image sensor design than Sony designers or Nikon designers. Performance is a combination of technology and design, everything else being equal. DxO historically has been weak on image sensor science and technology, as I recall.Eric R Fossumhttps://www.blogger.com/profile/09740612324630105312noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-46832789141758222482017-01-12T11:40:57.659+02:002017-01-12T11:40:57.659+02:00Who are those other camera sensors who's resul...Who are those other camera sensors who's results come straight from the sensor wit no prior noise reduction? I don't think Sony qualifies and since Nikon gets better scores with the same sensor I would think thye're doing some noise reduction as well. Pentax certainly is. Olympus and Panasonic do some too so maybe only Canon (their preference for Astro pics probably has something to do with this) but even then I wouldn't bet the house on it.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-58395673919051986512017-01-12T10:04:18.333+02:002017-01-12T10:04:18.333+02:00The other side of the coin : they can benefit from...The other side of the coin : they can benefit from a good training in the field ! See www.harvestimaging.comAlbert Theuwissen - Harvest Imagingnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-76374662589184856142017-01-12T09:49:47.479+02:002017-01-12T09:49:47.479+02:00This explanation of shot noise by DxO is quite uno...This explanation of shot noise by DxO is quite unorthodox... <br /><br />"There is a certain inherent unpredictability in the behavior of photons. It is impossible to predict with certainty where a particular photon will land on a sensor. Depending on how large individual pixels are, some number of photons will land on a pixel other than the one you’d expect if they simply traveled in a straight line. This results in a certain minimum amount of noise (sometimes referred to as “photon shot noise”) when an image is captured."Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-33125324396719084432017-01-12T04:07:10.514+02:002017-01-12T04:07:10.514+02:00I have always wondered who REDs image sensor suppl...I have always wondered who REDs image sensor supplier is but they do a good job of keeping that quiet. Anynody know? Teledyne/Dalsa?Anonymousnoreply@blogger.com