Telecamera con elevato FPS e grabber
Salve a tutti,
Mi scuso in anticipo se una domanda simile e' stata gia' fatta ma non ho trovato nulla sul forum di simile.
Spiego nel dettaglio il mio problema.
Ho sviluppato un sistema con LabVIEW in cui sto usando una camera fireWire CMOS per acquisire immagini dell'occhio. Ho bisogno di un elevato FPS, e quando cerco di acquisire a piu' di 60 FPS le immagini sono completamente scure a causa della scarsa sensibilita' alla luce. Non sto usando nessuna lente, ho progettato il mio tavolo di lenti per osservare con una determinata magnification l'occhio.
Dal momento che ho bisogno di fare processing sulle immagini stavo optando per acquistare una camera CCD (con un QE abbastanza alto e dunque una sensibilita' alla luce maggiore) che mi permetta di acquisire a piu' di 50 Fps. Ho trovato dal sito NI dei riferimenti alla camera basler aviator, la quale mi sembra abbastanza adatta all'applicazione (QE oltre il 50% con le dimensioni della pixel cell accettabili circa 5x5 micrometri).
La mia domanda e': esistono due versioni di queste camere, una GigE ed una camera link. Ho bisogno di una scheda PCIexpress come frame grabber? Ho bisogno di una in particolare? Tutte le camere con interfaccia GigE o cameraLINK sono compatibili con i frame grabber NI? Non ho problemi di driver che devo valutare?
Inoltre, e' possibile attraverso NIMAX (stesso software che sto usando per impostare i parametri della camera CMOS firewire), settare i parametri come frame rate, exposure time, ROI etc? Ed e' inoltre possibile effettuare l'overlap tra integration time e readout time della camera? Chedo questo perche' alcune camere lo consentono e cio' aumenterebbe le possibilita' di ottenere immagini migliori e piu' definite.
Grazie per eventuali risposte, a dire il vero non so come ottenere risposte certe a queste domande, e siccome il costo di queste camere e di un eventuale frame grabber e' alto mi dispiacerebbe sbagliare nell'acquisto.
Saluti,
Cesare.
Risolto
Andare alla soluzione.
Ciao come telecamere ti posso consigliare per esperienza diretta le Point Grey.
A questo link http://www.ptgrey.com/news/pressreleases/details.asp?articleID=705 trovi due documenti riassuntivi delle caratteristiche di tutti i tipi di sensore usati nelle loro camere divisi per modelli a colori e in mono.
Riguardo l'interfaccia ti consiglio di andare su GigE, non ti serve un frame grabber ma una scheda di rete, l'unica accortezza è che deve essere una scheda che supporta Gigabit e deve essere basata su chip Intel Pro 1000 come puoi leggere insieme ad altre info utili qui http://www.ni.com/white-paper/5651/en/
Da NI MAx si possono controllare tutti i parametri standard della camera, non so se si può anche impostare l'overlap dei tempi.
Spero di essere stato di aiuto.
Alessandro
Alessandro Ricco
ILVG.it - Italian LabVIEW user Group, ADMIN & LabVIEW Champion
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http://digital.ni.com/public.nsf/websearch/F05924D50AD6472B86256F320075CDBF?OpenDocument
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at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:210)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:441)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:430)
at com.sap.engine.services.servlets_jsp.filters.DSRWebContainerFilter.process(DSRWebContainerFilter.java:38)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.servlets_jsp.filters.ServletSelector.process(ServletSelector.java:81)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.servlets_jsp.filters.ApplicationSelector.process(ApplicationSelector.java:276)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.WebContainerInvoker.process(WebContainerInvoker.java:81)
at com.sap.engine.services.httpserver.chain.HostFilter.process(HostFilter.java:9)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.ResponseLogWriter.process(ResponseLogWriter.java:60)
at com.sap.engine.services.httpserver.chain.HostFilter.process(HostFilter.java:9)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.DefineHostFilter.process(DefineHostFilter.java:27)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.MonitoringFilter.process(MonitoringFilter.java:29)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.SessionSizeFilter.process(SessionSizeFilter.java:26)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.MemoryStatisticFilter.process(MemoryStatisticFilter.java:57)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.filters.DSRHttpFilter.process(DSRHttpFilter.java:43)
at com.sap.engine.services.httpserver.chain.ServerFilter.process(ServerFilter.java:12)
at com.sap.engine.services.httpserver.chain.AbstractChain.process(AbstractChain.java:78)
at com.sap.engine.services.httpserver.server.Processor.chainedRequest(Processor.java:475)
at com.sap.engine.services.httpserver.server.Processor$FCAProcessorThread.process(Processor.java:269)
at com.sap.engine.services.httpserver.server.rcm.RequestProcessorThread.run(RequestProcessorThread.java:56)
at com.sap.engine.core.thread.execution.Executable.run(Executable.java:122)
at com.sap.engine.core.thread.execution.Executable.run(Executable.java:101)
at com.sap.engine.core.thread.execution.CentralExecutor$SingleThread.run(CentralExecutor.java:328)
Caused by: RfcException: [null]
message: Name or password is incorrect (repeat logon) on DXI mshost strsap31
Return code: RFC_SYS_EXCEPTION(3)
error group: 103
key: RFC_ERROR_LOGON_FAILURE
at com.sap.conn.rfc.api.RfcApi.RfcOpen(RfcApi.java:219)
at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcClient.connect(MiddlewareJavaRfc.java:1331)
... 87 more
Caused by: RfcException: [DXI|strsap31]
message: Name or password is incorrect (repeat logon)
Return code: RFC_SYS_EXCEPTION(3)
error group: 104
key: RFC_ERROR_SYSTEM_FAILURE
Exception raised by DXI|strsap31
at com.sap.conn.rfc.engine.RfcIoOpenCntl.RfcReceive(RfcIoOpenCntl.java:2034)
at com.sap.conn.rfc.api.RfcApi.RfcOpen(RfcApi.java:187)
... 88 more
Caused by: com.sap.conn.rfc.exceptions.RfcGetException: Name or password is incorrect (repeat logon)
at com.sap.conn.rfc.engine.RfcImp.ab_rfcerror(RfcImp.java:1157)
at com.sap.conn.rfc.engine.RfcGet.rfcget_run(RfcGet.java:131)
at com.sap.conn.rfc.engine.RfcGet.ab_rfcget(RfcGet.java:23)
at com.sap.conn.rfc.engine.RfcRcv.ab_rfcreceive(RfcRcv.java:33)
at com.sap.conn.rfc.engine.RfcIoOpenCntl.RfcReceive(RfcIoOpenCntl.java:1981)
... 89 moreUser id missing in client 000
-
System heat up and frame rate reduces to 5 fps approx. while playing FIFA 12
The game works very well in first 2 minutes of startup but after that the fan speed increses abnormally and hard disk also heats up. this is followed by reduced frame rate about 5 fps which makes it very difficult to play the game. While this problem is not seen with earlier versions of FIFA 09 and FIFA 10.
I am using HP-Pavilion dv4 1204tu laptop. 3GB ram. Windows Vista SP1 32-bit. and Intel(R) Graphics Media Accelator Series 4.Interesting, and yet the video card worked beautifully through Mac OS X 10.5.x and 10.6.x until 10.6.5 came along. And the game binary hasn't changed, so the problem must be with the OS.
Further, if I understand the hierarchy of responsibilities in the software correctly, it's not surprising that the game worked with a video card it may not have listed as supported: Apple supplies an OpenGL library, and compatible drivers for the video cards it sells (that would include my video card, of course), and the games use the OpenGL library to do their graphics. So there's an Apple-supplied abstraction layer (or two) between the game and the video card. In principle, the game doesn't need to know what type of video card is present; just which of the many of the OpenGL features the OpenGL library supports, and whatever the OpenGL library allows it to discover about a video cards' functionality. That way, game developers don't have to create separate versions of their games, or huge amounts of their own video card abstraction code, in order to write a game that's compatible with all of the many video cards on the market at any given time, and all of the new video cards that will come along after the game is published. (I believe my ATI Radeon HD 4870 falls into the latter category.) -
Difference between conn.close() and conn=null;
Hi All,
Can anybody please let me know the difference between conn.close()
and conn=null;
where conn is reference to Connection.
Thanks and Regards
-sunjavadeveloperThanks for your response.
Is there any other good approach to close() & then
null the Obj. can u give us your opinion.
finally
try{
if(dbconn != null) dbconn.close();
if(stmt != null) stmt.close();
if(rs != null) rs.close();
if(con != null) con.close();
catch (Exception e)
logger.fatal(e.getMessage(),e);
throw new Exception ("Exception -- Vendor.java --
a -- authenticate -- " + e.getMessage() );
dbconn = null;
rs = null;
stmt=null;
con = null;
Putting the close() calls in finally block is good, but having them in individual try/catch blocks is better. That way you can still try to close the connection if closing the statement throws an exception.
I don't bother setting them to null. GC is smart enough to know that they've gone out of scope. I don't think it helps.
% -
Mid 2012 13.3" macbook pro whats the max HZ(fps)
i play allot of games on my mid 2012 13.3" macbook pro i play them all a 60Hz(60 fps) what is the max i can set it too with out damaging the display my friend have some monitors that use 125Hz they say that would damahe my screen i what to know what is recommended
All 13" MBPs only have the built in Intel graphics so you are very limited as to what FPS you can run games at.
As far as the Hz screens run at that has no baring on game play. All flat screen monitors use the 60Hz setting but it really doesn't matter on LCD/LED screens. That is really a Refresh rate for CRT monitors that had to Redraw the screen from top to bottom, bottom to top but with LCD/LED the whole screen is refreshed at once, IE no scanning like on older TUBE CRT monitors. -
**EDIT**
Unable to post direct image links , please ad HTTP:// before links
Good evening Fellow Gamers and Adepts.
I come to you tonight with a serious doubt , which has rattled me for a while , and after some intense troubleshooting i have came up blank.
Here's the deal , as stated , i have a MSI GE60 2PE apache Pro
Now , playing cs go has been the bane of my existence, i am aware there are heating issues with this laptop , but those have been fixed by a Thermal repaste, a cooling pad and the backplate removed.
Now i have no more throttling of CPU , and GPU appears to handle fine aswell; the thing is i keep having MASSIVE lag spikes in CS:GO , and apparently they are being cause by CPU issues.
Image for clarification .
(Standart situation , notice the relative low fps for a old game)
imgur.com/cJ2Ly80
After a few seconds the following occurs
imgur.com/cJ2Ly80,27y1P5C,aq30R4r#1
Notice the fps drop and the CPU frequency percent alert in game
another shot of this in console so you can see the several occurrences
imgur.com/cJ2Ly80,27y1P5C,aq30R4r#2
now keep in mind that these are the lowest game settings, in Fullscreen windowed mode , if i even CONSIDER putting it on standart fullscreen i get unplayable jitterness and fps that range from 10 to 80 , all in a second.
Now , as i have stated i have fooled around and disabled speedstep in the bios , meaning that the cpu is always at 100%, seeing i have removed the backplate , throttling is not an issue as IXT (Intel extreme tuning) can attest.
note aswell the "active core count" spikes to 4/3 in the exact moments of the stutters, meaning that both problems should , in theory , be connected .
Image for reference:
gyazo.com/e1257716681828d38213bcc0e5fa71bc
Details of IXT
gyazo.com/1f03a344b9ac2642b1a885ee0a8ea078
can ANYONE give me an ideia of whats going on ? i rather enjoy playing with games with friends , but this is driving me up the wall..
Lastest NVIDIA / Laptop drivers installed ; Bios Updated and EC firmware aswell.
Thank you for your time guys x)
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