2012-01-20 00:53 cladamw [cladamw!~Adam@host-222.80-43-115.dynamic.totalbb.net.tw] has joined #qi-hardware 2012-01-20 00:53 pabs3 [pabs3!~pabs@d122-109-116-106.per801.wa.optusnet.com.au] has joined #qi-hardware 2012-01-20 01:00 :) http://www.flickr.com/photos/7958754@N03/6721433793/in/photostream/ 2012-01-20 01:18 xiangfu [xiangfu!~xiangfu@114.247.10.75] has joined #qi-hardware 2012-01-20 01:19 orsonzhai [orsonzhai!~zhai@1.202.15.210] has joined #qi-hardware 2012-01-20 01:23 xiangfu [xiangfu!~xiangfu@fidelio.qi-hardware.com] has joined #qi-hardware 2012-01-20 01:53 xiangfu_ [xiangfu_!~xiangfu@114.247.10.75] has joined #qi-hardware 2012-01-20 02:42 wej [wej!~j@m2.mullvad.net] has joined #qi-hardware 2012-01-20 02:52 pabs3 [pabs3!~pabs@d122-109-116-106.per801.wa.optusnet.com.au] has joined #qi-hardware 2012-01-20 03:12 wej [wej!~j@m2.mullvad.net] has joined #qi-hardware 2012-01-20 04:00 cladamwa [cladamwa!~Adam@host-222.80-43-115.dynamic.totalbb.net.tw] has joined #qi-hardware 2012-01-20 05:27 pabs3 [pabs3!~pabs@d122-109-116-106.per801.wa.optusnet.com.au] has joined #qi-hardware 2012-01-20 05:30 cladamw [cladamw!~Adam@host-222.80-43-115.dynamic.totalbb.net.tw] has joined #qi-hardware 2012-01-20 07:04 panda|x201 [panda|x201!~hzhang@123.125.157.20] has joined #qi-hardware 2012-01-20 07:21 jekhor [jekhor!~jek@vulture-nat-32.telecom.by] has joined #qi-hardware 2012-01-20 07:25 Ayla [Ayla!~paul@9.95.112.78.rev.sfr.net] has joined #qi-hardware 2012-01-20 07:40 wej [wej!~j@m2.mullvad.net] has joined #qi-hardware 2012-01-20 07:50 qi-bot [qi-bot!~qi-bot@turandot.qi-hardware.com] has joined #qi-hardware 2012-01-20 07:50 cladamw [cladamw!~Adam@host-222.80-43-115.dynamic.totalbb.net.tw] has joined #qi-hardware 2012-01-20 07:51 service is back up, sorry for the inconvenience 2012-01-20 07:52 s/service/server/ 2012-01-20 07:52 wolfspraul meant: "server is back up, sorry for the inconvenience" 2012-01-20 07:52 and the bot helps me, thanks! 2012-01-20 08:47 DocScrutinizer [DocScrutinizer!~halley@openmoko/engineers/joerg] has joined #qi-hardware 2012-01-20 09:03 mstevens [mstevens!~mstevens@fsf/member/pdpc.active.mstevens] has joined #qi-hardware 2012-01-20 09:10 CcSsNET [CcSsNET!~user@c-98-216-138-179.hsd1.ma.comcast.net] has joined #qi-hardware 2012-01-20 09:49 valhalla [valhalla!~valhalla@81-174-23-178.dynamic.ngi.it] has joined #qi-hardware 2012-01-20 10:05 antoniodariush [antoniodariush!~antonioda@nat-sta-smtc2.tvu.ac.uk] has joined #qi-hardware 2012-01-20 10:39 jluis [jluis!~jpddb@83.247.136.72] has joined #qi-hardware 2012-01-20 10:45 jekhor [jekhor!~jek@mx2.promwad.com] has joined #qi-hardware 2012-01-20 10:59 wpwrak_ [wpwrak_!~werner@94-163-231-201.fibertel.com.ar] has joined #qi-hardware 2012-01-20 11:00 wpwrak [wpwrak!~werner@94-163-231-201.fibertel.com.ar] has joined #qi-hardware 2012-01-20 11:01 grmbl. CCFL seems to be dead for good. sigh. time to go monitor shopping ... 2012-01-20 11:14 [commit] Werner Almesberger: m1/ledravaganza/: draft proposal and example circuit for M1r4 LED matrix (master) http://qi-hw.com/p/wernermisc/4e044fc 2012-01-20 11:46 jivs [jivs!~jivs@nat-sta-smtc2.tvu.ac.uk] has joined #qi-hardware 2012-01-20 11:46 wpwrak: do you know any dense dot matrix lcd (close to a monitor, it doesn't matter if it's black/white only) that does not have backlight? 2012-01-20 11:46 as with typical calculators, with a mirror below the lcd 2012-01-20 11:48 hmm, isn't that qi-pixel display like that ? maybe you could scavenge an OLPC 2012-01-20 11:49 whati s that? 2012-01-20 11:49 qi-pixel 2012-01-20 11:49 ah looks fine 2012-01-20 11:49 ah, Pixel Qi :) nothing to do with us 2012-01-20 11:50 ahh 2012-01-20 11:57 cladamw [cladamw!~Adam@host-222.80-43-115.dynamic.totalbb.net.tw] has joined #qi-hardware 2012-01-20 12:41 cladamw_ [cladamw_!~adamwang@host-222.80-43-115.dynamic.totalbb.net.tw] has joined #qi-hardware 2012-01-20 12:59 wolfspraul [wolfspraul!~wolfsprau@p5B0AD0B9.dip.t-dialin.net] has joined #qi-hardware 2012-01-20 13:58 Openfree` [Openfree`!~Openfreer@116.228.88.131] has joined #qi-hardware 2012-01-20 14:33 jluis [jluis!~jluis@2001:5c0:1400:a::f6f] has joined #qi-hardware 2012-01-20 14:50 I'm thinking about putting a QR-code label on PCBs that links directly to an online failure reporting/analysis/corrective action database 2012-01-20 14:51 have to find some nice free server-side software for that first 2012-01-20 14:54 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 14:57 Textmode [Textmode!~boneidle@adsl-syd-2-209.ozonline.com.au] has joined #qi-hardware 2012-01-20 14:57 panda|x201 [panda|x201!~hzhang@123.116.125.65] has joined #qi-hardware 2012-01-20 15:33 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 15:50 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 15:55 steve|m [steve|m!~steve@osmocom/steve-m] has joined #qi-hardware 2012-01-20 16:06 wej [wej!~j@m2.mullvad.net] has joined #qi-hardware 2012-01-20 16:19 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 16:30 wej [wej!~j@m2.mullvad.net] has joined #qi-hardware 2012-01-20 16:43 emeb [emeb!~ericb@ip72-223-81-94.ph.ph.cox.net] has joined #qi-hardware 2012-01-20 16:45 mstevens [mstevens!~mstevens@fsf/member/pdpc.active.mstevens] has joined #qi-hardware 2012-01-20 16:46 wolfspraul: QR decoding is available as open source: http://zbar.sourceforge.net/ 2012-01-20 16:59 I wanted to use that lib for barcode decoding, some time ago 2012-01-20 17:00 but I noticed my webcam can't focus a barcode of usual size. 2012-01-20 17:03 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 17:22 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 18:13 err, why's that? 2012-01-20 18:14 has it auofocus that's braking on barcodes? (I've seen that more than once) 2012-01-20 18:15 if so, it usually helps to rotatae either narcode or cam by >45 2012-01-20 18:15 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 18:16 <135 2012-01-20 18:47 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 19:19 jekhor [jekhor!~jek@vulture-nat-32.telecom.by] has joined #qi-hardware 2012-01-20 19:40 mstevens [mstevens!~mstevens@fsf/member/pdpc.active.mstevens] has joined #qi-hardware 2012-01-20 19:41 jekhor [jekhor!~jek@vulture-nat-32.telecom.by] has joined #qi-hardware 2012-01-20 19:52 wolfspraul: make sure you get the QR in silkscreen, not in copper. Also consider silkscreen usually tends to bleed out so your QR might get illegible when too small and np correction factor for shrinking silkscreen print 2012-01-20 19:52 no* 2012-01-20 19:52 my idea was different 2012-01-20 19:52 first I don't like any serial numbers that are not easily removable 2012-01-20 19:53 say lasered for example 2012-01-20 19:53 and then, the idea here is to have the link directly to the data for this particular board 2012-01-20 19:53 a unique address for that board, like the MAC address 2012-01-20 19:53 but as a gluable label, not in silk or lasered or so 2012-01-20 19:53 duh 2012-01-20 19:54 what's the use of that? nser#? 2012-01-20 19:55 keep track of defects and technical history of that board 2012-01-20 19:55 :nod: 2012-01-20 19:55 you might consider looking into CD inkjet-printers 2012-01-20 19:56 DocScrutinizer: no, without autofocus. fixed focus 2012-01-20 19:57 I mean such a cheesy dualuse (also) CD printer will easily take non-circle-shaped PCB after smallish mods 2012-01-20 19:59 depending on the way you do things, your metrics of "easily removable" might either not get matched or vastly over-fulfilled 2012-01-20 19:59 I.E. "don't touch the printing, or it will smear and vanish" 2012-01-20 20:00 or "use a knofe or sandpaper to scratch it off" 2012-01-20 20:00 knife* 2012-01-20 20:01 I for one prefer to HARDlink such properties to the tagged object 2012-01-20 20:01 so no fool sends me a PCBA with a fake/swapped/borrowed SER# 2012-01-20 20:02 viric: so why couldn't it focus then? 2012-01-20 20:02 it never can focus ;-) 2012-01-20 20:03 or do you mean "QR is too small to read it out when held far enough from fixed focus webcam to be in-focus"? 2012-01-20 20:04 DocScrutinizer: well, it focuses at a distance where the barcode does not have enough resolution to be detected 2012-01-20 20:04 which would be kinda .oO(???) as well, the usual webcam at least should have 640*400, no? 2012-01-20 20:04 I use "focuses" as "has a fixed focus to", instead of any active verb 2012-01-20 20:04 1024x768 2012-01-20 20:05 so you should have several pixel per datsel of QR 2012-01-20 20:05 with more than 45° aperture I'd say. 2012-01-20 20:05 focused at 50cm 2012-01-20 20:05 even in a good distance, unless for microscopic QR 2012-01-20 20:06 I'm talking about barcodes. 2012-01-20 20:06 those of supermarkets 2012-01-20 20:07 short calculation: 1m dist = ~50cm width, /1024 = 0.5mm/pixel 2012-01-20 20:08 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 20:10 and you think that's good for a barcode? 2012-01-20 20:10 :) 2012-01-20 20:10 unless there's too much of aliasing, I.E. more than 2pixel / datsel/bar, I'd expect it to work 2012-01-20 20:10 it's not a Hubble lens 2012-01-20 20:11 after all barcodes are robust to read out 2012-01-20 20:12 you just need one semi decent scanline in one of 50 frames each second 2012-01-20 20:12 for barcodes 2012-01-20 20:13 that does not happen with this webcam :) 2012-01-20 20:14 if you have a webcam in your notebook.. you can try. 2012-01-20 20:14 I don't 2012-01-20 20:15 ok :) 2012-01-20 20:16 probably your lib is crap, hoping for optimal input data to get away with a over simplistic approach for decoding 2012-01-20 20:17 usual barcodes always have a calibration header&trailer 2012-01-20 20:18 or fixed width binary coding 2012-01-20 20:18 where you see only bars of 1* 2* 4* width 2012-01-20 20:18 usually even both 2012-01-20 20:19 well, seeing the images live, I can't distinguish the bars either 2012-01-20 20:19 hmm .. choice 1) spend the weekend with only two screens. 2) go out and buy a new one, replacing the one that's broken. minor obstacle: power is down in part of the building, already for 12+ hours. this means: no elevators. and it's 14 floors at 35 C ... 2012-01-20 20:19 it gets like some grey 2012-01-20 20:19 wpwrak: 'only' two screens? 2012-01-20 20:19 hmm, now that's actually a tad too little on info then 2012-01-20 20:20 a tad? 2012-01-20 20:20 indeed, a tad 2012-01-20 20:20 you'd be amazed what a good filter can get out of what you think is uniform grey 2012-01-20 20:20 hm tad == small child? 2012-01-20 20:21 ad tad == a little 2012-01-20 20:21 itsibitsy 2012-01-20 20:21 viric: trust me. once you've had tree, you don't want to go back to two :) 2012-01-20 20:22 I keep my 2nd screen in office off all the time 2012-01-20 20:22 what I can't do one one screen isn't worth getting done ;-D 2012-01-20 20:23 viric: look, do you see the single pixels? 2012-01-20 20:24 no? then why do you think you should see the 1 pixel wide bars 2012-01-20 20:24 1, or 2 2012-01-20 20:24 for a decoder that makes a hell of a difference, and a proper image with 1 and 2 pixel wide bars is perfectly decodable 2012-01-20 20:26 even when the bars bleed out to neighbour pixels, you still can decode them 2012-01-20 20:26 as gray pixels are supposed to be white when next to a black pixel 2012-01-20 20:26 you see what I mean? 2012-01-20 20:27 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 20:27 you *know* it's a barcode you look on, hell you even can use kalman filters ;-D 2012-01-20 20:27 will pull your barcode from true noise 2012-01-20 20:34 ask the GPS guys if they could see their SAT signal on a scope, by watching the receiver IF 2012-01-20 20:35 I thik the signal is some 30..60dBm *below* receiver noise there 2012-01-20 20:37 I'm absolutely sure you can get barcodes from a video signal that has pure white noise for all you could tell by visual inspection, by just applying same decoding principles 2012-01-20 20:38 takes quite a bit of computation grunt, but hey that's el'cheapo nowadays 2012-01-20 20:41 hm maybe :) 2012-01-20 20:41 in any case, zbar failed 2012-01-20 20:41 braddead lib I guess 2012-01-20 20:41 braindead even 2012-01-20 20:43 I've seen pictures getting algorithmically deblurred 2012-01-20 20:44 in Tannhauser 2012-01-20 20:45 DocScrutinizer: ok, you want a picture ;) 2012-01-20 20:46 for sure not 2012-01-20 20:47 just saying there's definitely always a smarter method to decode a barcode than the one you're jst using - no matter what might be that currently used method. Further saying you might get barcodes from video material you'd not believe there's *any* info on it 2012-01-20 20:48 I understand 2012-01-20 20:49 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 21:26 I dunno if I could find the linke once more, but there's been a report from a university where they got accurate data for an individual's heart pulse rate, blood pressure and O2 saturation (or maybe it was onky two out of those 3), by analyzing simple standard video material for otherwise not noticeable color changes of the skin 2012-01-20 21:28 rather nifty stuff indeed 2012-01-20 22:13 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 22:28 lekernel [lekernel!~lekernel@f052071251.adsl.alicedsl.de] has joined #qi-hardware 2012-01-20 22:54 wolfspraul [wolfspraul!~wolfsprau@p5B0AD0B9.dip.t-dialin.net] has joined #qi-hardware 2012-01-20 23:07 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware 2012-01-20 23:24 valhalla [valhalla!~valhalla@81-174-23-153.dynamic.ngi.it] has joined #qi-hardware 2012-01-20 23:38 jluis [jluis!~jluis@2001:5c0:1400:a::385] has joined #qi-hardware