tag:blogger.com,1999:blog-19092890.post4035236827572560910..comments2024-03-28T17:41:43.970+02:00Comments on Image Sensors World: Panasonic Announces D-IMager, a 3D ToF ImagerVladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger21125tag:blogger.com,1999:blog-19092890.post-35555619620334067412010-11-28T21:43:41.838+02:002010-11-28T21:43:41.838+02:00Panasonic has copied the MESA approach! I think th...Panasonic has copied the MESA approach! I think there will be some ToF patent problems in the future. From my point of view, MESA and PMD have the most established patents worldwide!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-57266242829204684722010-08-11T14:29:05.929+03:002010-08-11T14:29:05.929+03:00There are a lot more companies on the market. Take...There are a lot more companies on the market. Take a look at PMDTechnologies. You can find a whitepaper about the comparsion of stereo and TOF on the webpage.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-80571626701689040372010-07-30T05:05:24.424+03:002010-07-30T05:05:24.424+03:00Hello Sir,
I want 3D camera for 3D gesture recogni...Hello Sir,<br />I want 3D camera for 3D gesture recognition (with deph information). Please tell me its cost and how will I get it?<br />Email ID: sonal.kumari1910@gmail.com<br /><br />Sonal KumariAnonymoushttps://www.blogger.com/profile/06625611901057680799noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-31786207196676509152010-06-16T23:58:24.298+03:002010-06-16T23:58:24.298+03:00PrimeSense solution offers both depth and color im...PrimeSense solution offers both depth and color image and sound as well.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-89196416037988824182010-06-08T14:18:12.314+03:002010-06-08T14:18:12.314+03:00As for Canesta, it's better than Optrima for o...As for Canesta, it's better than Optrima for our goals, but it has also many disadvantages. Noise is too hight to use only depth mask of Canesta to make something valuable on significant distance (more than 2-3 meters)...Artemhttps://www.blogger.com/profile/08026198125829003733noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-39479803654738184452010-06-08T14:14:28.889+03:002010-06-08T14:14:28.889+03:00You are absolutely right, the best solution is usa...You are absolutely right, the best solution is usage of hybrid data: depth data plus color image.Artemhttps://www.blogger.com/profile/08026198125829003733noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-20452719175938881332010-06-07T22:31:53.659+03:002010-06-07T22:31:53.659+03:00Dear Artem,
TOF is not a silver ballet neither ! ...Dear Artem,<br /><br />TOF is not a silver ballet neither ! You will face the same problem as other computer vision based solution. I can find all the cases that TOF cannot work.<br /><br />The key point is what is needed for gesture control ???Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-6990083980701079432010-06-07T20:31:56.717+03:002010-06-07T20:31:56.717+03:00>>> How about the use of optic flow ?
Raw...>>> How about the use of optic flow ?<br />Raw optical flow can be used only to make some drafts for yourself.<br />How about noise on background/foreground, how about tracking control user in the crowd, how about distinguishing hands (left/right) and other parts of the body and other objects that are not control user?<br />Hey, you are talking as a kid or about things that can be done for a few hours. TOF is not required for such child jobbing.<br />I'm talking about COMMERCIAL SOLUTIONS, otherwise TOF is not required,Artemhttps://www.blogger.com/profile/08026198125829003733noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-39558785503880654412010-06-07T17:42:08.150+03:002010-06-07T17:42:08.150+03:00How about the use of optic flow ?
http://www.youtu...How about the use of optic flow ?<br />http://www.youtube.com/watch?v=ssINeWRb58M&feature=PlayList&p=296F3619D33C4179&playnext_from=PL&index=6Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-29324437871329059452010-06-07T00:43:46.392+03:002010-06-07T00:43:46.392+03:00>>> The raw data is very noisy and tempor...>>> The raw data is very noisy and temporal smoothing is needed<br />Yes, you need preprocessing filtration to process usefull data from depth sensor, but anyway it's easier and much reliable to recognize hand gestures using depth mask than color 2D image only, because the main problem of commercial level hand-tracking applications on 2D color camera is background noise (objects or other people on background).<br />As for stereocameras I didn't try professional stereocameras, but as for two simple calibrated web-cameras then there are a lot of issues and not much advantages comparing to single 2D cameras for tracking / gesture recognition.Artemhttps://www.blogger.com/profile/08026198125829003733noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-16906956295941750522010-06-07T00:32:06.677+03:002010-06-07T00:32:06.677+03:00Dear, Anonymous,
hand tracking on TOF on 25 fps mo...Dear, Anonymous,<br />hand tracking on TOF on 25 fps more than possible.<br />I didn't see Mesa Imaging, PMD, etc., but with Canesta even on 160x120 depth resolution sensor it's OK. By the way fps on this camera can be rised up to 60.<br />I heard that Canesta announced about 320x240 version, but I didn't worked with such sensor.Artemhttps://www.blogger.com/profile/08026198125829003733noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-78017660674136163452010-06-07T00:28:01.728+03:002010-06-07T00:28:01.728+03:00This comment has been removed by the author.Artemhttps://www.blogger.com/profile/08026198125829003733noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-85020414330592223452010-06-05T13:57:16.983+03:002010-06-05T13:57:16.983+03:00I think that Canesta is demonstrating 320x240 vers...I think that Canesta is demonstrating 320x240 version actually ....Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-34804444434971204512010-06-04T20:28:16.486+03:002010-06-04T20:28:16.486+03:00Dear Artem,
The frame rate could be another issue...Dear Artem,<br /><br />The frame rate could be another issue. I saw some of TOF cameras such Mesa Imaging, PMD, etc... The raw data is very noisy and temporal smoothing is needed. This smoothing operation reduces a lot the frame rate. I've difficulty to image the hand tracking at 3m with 25fps !!!<br /><br />What is your opinion ?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-67789092373260218252010-06-04T20:05:42.120+03:002010-06-04T20:05:42.120+03:00By the way real TOF cameras such as Canesta gives ...By the way real TOF cameras such as Canesta gives much better data then any stereo solutions and much more resistant to environment conditionsArtemhttps://www.blogger.com/profile/08026198125829003733noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-90362409891001097382010-06-04T20:03:50.705+03:002010-06-04T20:03:50.705+03:00I also worked with different 3D Cameras:
- PrimeSe...I also worked with different 3D Cameras:<br />- PrimeSense<br />- Optrima<br />- Canesta<br />Yes, Primesense injuries eyes in case you look on the laser, though they try to reduce it's intensity in such case. But Primesense has 320x240 depth sensor resolution that allows hand tracking on 4 meters, but both Optrima and Canesta has 160x120 depth sensor resolution and hand is too small to be tracked on more than 3 meters on such resolution.<br />On other side Optrima (with leds, not lasers) is not light resistant (could be used only for at-home solutions with closed windows to avoid straight sunlight). Primesense is a little more robust, but also has not hight sun light resistance.<br />Canesta is the best, but the most closed and documentation pure, and low depth sensor resolution (160x120) does not allow track hands of people on more than 3 meters.<br />I didn't tried Panasonic, but it seems it would be very similar to Canesta, but more raw.Artemhttps://www.blogger.com/profile/08026198125829003733noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-78402459787795521052010-06-03T17:05:03.866+03:002010-06-03T17:05:03.866+03:00Do you know there is a half watt laser inside Prim...Do you know there is a half watt laser inside PrimeSense stuff too ??<br /><br />I'll not buy such kind of stuff. I've worked on IR illumination based face recognition system and I did get some eye problem when I looked too long time before the camera. <br /><br />For face recognition, the exposition time is short but for gaming, it could be very long !!!!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-67752897175762297342010-06-03T11:10:49.441+03:002010-06-03T11:10:49.441+03:00I wonder how this might compete with PrimeSense so...I wonder how this might compete with PrimeSense solution as adupted by Microsoft for its Xbox NUI ? price ? avaliability ? size ?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-68278280000938252752010-06-02T18:51:48.245+03:002010-06-02T18:51:48.245+03:00I cannot comment too much on stereo solutions (I h...I cannot comment too much on stereo solutions (I haven't worked on them). It's a trade off of having the complexity of the triangulation computation associated with stereo, versus the complexity of requiring an illuminator (driver and source). Some computation is still required to convert photon time of arrival to distance, as well as discriminate between false arrivals (noise) and legitimate return photons. Further, since a ToF imager comes with it's own (non-visible wavelength) illumination source, you don't rely on the ambient light conditions to create the basic images (as req'd for stereo).<br />In the ToF world you also need to consider eye (illuminator) safety.<br /><br />EF final sentence applies.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-28487744857799736232010-06-02T13:57:37.363+03:002010-06-02T13:57:37.363+03:00ToF measures distance directly to objects in the s...ToF measures distance directly to objects in the scene with little computation required.<br /><br />There are many disadvantages of ToF compared to stereo, but stereo is not so great either. In my opinion the advantages and disadvantages depend on the application and scene.Eric R Fossumhttps://www.blogger.com/profile/09740612324630105312noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-66094282126832391622010-06-01T19:49:46.273+03:002010-06-01T19:49:46.273+03:00What is the fundamental advantage of ToF compared ...What is the fundamental advantage of ToF compared to classic stereo vision solution ??<br /><br />Thanks !Anonymousnoreply@blogger.com