execution time varied in image processing

Similar Questions

• SQL execution time

  Hello

  I was wondering if anyone could advise on the best way to capture the following in an 11g database.

  Say that we have;

  -a piece of SQL execution by up to 50 times per minute.

  -unique execution times vary.

  Aside from dba_hist_sqlstat and generate a sort of average over a period of 30 min.

  What would be the best way to get the execution time of this piece of SQL in real-time.

  say I want the individual execution time of this last of 100 executions.

  Any help would be appreciated

  Thank you

  Draw the session (with events of waiting if you want) that executes SQL and tkprof the trc file.

  ORACLE-BASE - Oracle Trace and TKPROF

  Oracle related things: basic SQL statement diagnostic performance - HOW TO, step-by-step instructions

• How to measure the execution time of a specific to a VI process?

  Hello! My VI has two processes: compression and edge detection image and I'm trying to measure the execution time for the process of detection of edge of my VI, but I don't know how to do. Please give me some ideas on how to do it. Thank you!

  There are several ways that you can do.

  -L' one is using the number of cycles before and after your vi to get time like here: http://digital.ni.com/public.nsf/allkb/6F6B9F4E149C80578625652800784764

  - or use the profiling: https://zone.ni.com/reference/en-XX/help/371361H-01/lvhowto/profiling_vis/

  Edit: If you're open to suggestions:

  -You have not to load the image inside the loop instead, make him outside of the loop.

  - And I see of many IMAQ buffers are not removed properly. You can have everything at once by Images (No) by logging in to Boolean TRUE: http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_dispose/

• execution of inset in the image processing

  Hi all, I am using LabVIEW 2010 and the target computer is an Intel Atom N270 processor.

  I have a sub - VI dedicated to process the images acquired from a remote IP camera image. I want to deal with more than one camera in time. The question is: if I put my channel sub - VI like returning to image processing, image 'son' are protected? I know that these purple wires are only references to my images, and I fear that a second thread could change the reference at the beginning of the process chain while a previous image is processed at the end.

  I read in previous discussions on the change of each sub - VI IMAQ returning to achieve an improvement in the execution of the performance but the condition of incoming execution (in the vi containing the process chain) protects all references?

  Thanks in advance,

  Daniel

  Yes, Vision library is thread-safe. If you set your image processing environment VI (and all of its dependencies), you can process multiple images at a time, assuming you pass the different references to your treatment VI. Vision library lock a picture if it modifies the function you are calling.

  -Christophe

• In almost real time image processing

  What is the best way to implement almost "real - time" treatment of image with two usb cameras? Capture, process, showing results and then capture, process, etc. until I chose to stop the program. I use LV with vision development module 8.6. What function can I use to capture the image?

  With LabVIEW 8.6, you can get the driver NOR-IMAQ for USB cameras .  It's really similar to the other drivers IMAQ, but examples are provided in this knowledge base.  To use several cameras, you will use just two copies of the screws.

  I'm not sure if you need more information than that, but let me know if you have any more specific questions, with which I can help.

• best practices to increase the speed of image processing

  Are there best practices for effective image processing so that will improve the overall speed of the performance? I have a need to do near real-time image processing real (threshold, filtering, analysis of the particle/cleaning and measures) at 10 frames per second. So far I am not satisfied with the length of my cycle so I wonder if he has documented ways to speed up performance.

  Hello

  IMAQdx is only the pilot, it is not directly related to the image processing IMAQ is the library of the vision. This function allows you to use multi-hearts on IMAQ function, to decrease the time of treatment, Arce image processing is the longest task for your computer.

  Concerning

• refnum image processing

  I want the camera to stream to USB (buffer image0) with treatment in time real simple image (image1 buffer).

  After a treatment, I want to copy the image to another buffer image2.

  However, I have observed some interference between the pads.

  For example, I copied image1 image2 buffer. Whenever image2 buffer has been modified, image1 is also changed.

  I suspect my mistake in the refnum image processing but can't find it.

  Before posting my code shot, I want to check again with your comments because LV is not installed on this computer.

  Anyway, what is the rule in the definition/treatment image buffer?

  It is desirable to define the new back buffer image whenever I changed the image?

  I found a few examples of creating image inside the loop buffer without deleting the refnums.

  Is it safe to the memory of the control system?

  What I picture reference must be transferred with shift register?

  labmaster using LV2011 (no SP1)

  What image of buffers are you referring to the IMAQ Image?

  If so (or if not possible), these aren't the sons of Norway in labview, they are more like pointers than a thread that keeps the sata, so if you wiring buffer image 1 in the image of the stamp 2 make you actually point towards the same area of the image, copying data between buffers, there is a function of copy IMAQ This puts the data to the image specified by buffer 1 in the space of the image indicated by buffer 2.  (I say space image of table instead because IMAQ images are more complex than just a chunk of memory).

• Can't get Image Processing VI of the Vision to appear in Pallate functions on the block diagram

  Hello

  I just installed the latest Vision after installing Labview 8.5, and it seems that I can open files previous .vi I did that use functions like "IMAQ label" and "IMAQ separation", and while I can access the section "Utilities of Vision" of the Vision, I can't find the button for the 'Image Processing screw. (See below)

  Thank you for your time,
  Santiago

  Hi Santiago,

  Is it custom screws you have created and added to your palette or programs that use the screw of the range of Vision and movement?  When you say that you have installed Vision, are you talking about software Acquisition of Vision or Vision Development Module?  Image processing screws are installed with the Vision Development Module.  Check out this KB to see if these are the screws that you always see.  I suspect that Vision Development module needs to be reinstalled.

  Kristen H.

• Why the execution time increases with a while loop, but not with "run continuously?

  Hi all

  I have a problem of severe weather that I don't know how to fix it because I don't know exactly where it comes from.

  I order two RF switches via a data acquisition card (NI USB-6008). One job at the same time can be selected on each switch. Basically, the VI created for this feature (by a colleague) resets all the outputs of acquisition data and active then those desired. It has three entrances, two chain simp0le controls and a cluster table, that contains the list of all the outputs and some practical information to know what is connected (specific to my application).

  I use this VI in a complex application, and I have some problems with the execution time, which increased whenever I said the VI, so I did a test VI (TimeTesting.vi) to determine where the problem came. In this special VI I record the execution time in a csv file to analyze then with excel.

  After several tries, I found that if I run this criterion VI with the while loop, execution on every cycle time increases, but if I remove the while loop and use the funtionnality "Continuous run", the execution time remains the same. In my high level application, I have while loops and events, and so the runtime increases too.

  I someone could explain to me why execution time increases and how can we avoid this? I have attached my VI test and the necessary subVIs, as well as an image of a graph that shows the execution time with a while loop and «run permanently»

  Thanks a lot for your help!

  Your SetReset_DO VI creates a channel whenever it is called.  And that you never delete a task.

  When running continuously, that it's as if it only runs once and LabVIEW has internal mechanisms to close references that will not be used again.  When a VI is used as a Subvi, LV does not know if she will be called again, and lacks these things until the first level VI stops. You have a memory leak.

  Just as you open and close your file outside the loop for, create your channel out of the loop.

  Lynn

• Live Image processing

  Is it possible to perform image processing (sepia, vignetting) until the photo is actually taken.

  For example: Instagram Live Imaging.

  Thank you

  Not with the NDK 10.0.4.  It should be possible by the time launches BB10 or 2.1 takes place.

• Image processing failure: error code: 1004

  When you export to DropBox of Lighroom I get this error: image processing failure: error code: 1004

  Under which it lists all the images that I export.

  99% of the time the images for export to the correct location and look good. But the error always comes to the top. And every now and then photos are not really exporting.

  Windows 10

  Lightroom Version CC 2015.3

  Thank you!

  Try to reset the preferences of the instructions here file

• The time varying flow value

  Hello

  I started to create a CEAP plugin to generate the example queries.

  Using only key frames is not enough, that I should be able to set the value of a stream of variable time for each image. For example, if I create a path with the pen and copy only the keyframes, the path between the keyframes will not be the same.

  I saw that there is an AEGP_SetLayerStreamValue (...) but not for varying time streams.

  Can get the value of flow to each frame with AEGP_GetNewLayerStreamValue (...), I don't see how I could put it. Is it possible to do?

  Thank you!

  Nope. expressions are the only way to do it.

  any other way to change the param value will cause it to create a

  keyframe. (if this setting is already editing)

  on AE13.5 and the situation is even more strict and only the user interface

  thread could change the param values. change between the rendering thread has never been

  good idea, but you could get away with it in the past...

  (just tied up loose ends on this thread for future generations)

• Sometimes they have a hard time capture the image on a physical machine

  Hello

  Last night I had a hard time getting the image on a physical computer.  The machine is a windows 200 advanced server with Service Pack 4.  Last week, I was able to do it without any problem with the same thing.  I was finally able to capture the image after that I went into control manual (Add/Remove Programs) and remove the agent then rebooted. Has started the process more.

  The log file is attached. I'm just curious as to why the problem occurred.  I used the Converter 3.0.3.

  TNT

  It could be a problem with the version of the converter that you use. Of the 3.0.3 release notes, in the section "problems":

  New that task fails for source machine remote Windows when navigating backwards in the Conversion Wizard

  When the following circumstances are present, the physical source computer does not restart:

  • You are remote hot cloning a source of Windows 2000 or Windows NT4 machine

  • The agent is installed on the source machine, but the system has not yet been restarted

  • You change the selection in the source and change to the original source before clicking on finish in the Conversion Wizard

  In this scenario, the task will fail with an instant failure error message. The reboot is required to start the snapshot on the source remote machine service if this converter can take the snapshot of the machine.

  You can try to use the 4.0 version converter and see if you can reproduce the error.

  If you found this helpful, please consider naming pointsIt

• execution time of the procedure

  Hello
  
  I'm working on the Conversion project, there are 7 different procedures that execute one after the other. It takes nearly 17 hours to complete one conversion.
  My question is how can I find out what procedure and/or SQL takes maximum time so that I can fix it. We used dynmaic sql strongly to INSERT/CHANGE/REMOVE.
  We use Oracle 9i.
  
  I tried to use v$ session_longops but there are so many tiny Jules Destrooper in the procedure, which lasts less than 6 seconds to run, v$ session_longops does not display any result.
  

  DBMS_APPLICATION_INFO.SET_MODULE(  module_name => 'Proc1', action_name => 'Start'); 
  DBMS_APPLICATION_INFO.set_action(action_name => 'Just Started');

  Thank you
  Sandy
  
  Published by: Sandy310 on July 27, 2011 14:42

  You can try to create a table to record the execution time of each procedure...
  For example:

  -table of log´s
  create table executation_log (obj_name varchar2 (120),)
  VARCHAR2 (120) of the event.
  time_execute timestamp);

  -log´s procedure
  create or replace procedure prc_log (p_obj_name in varchar2,
  p_event in varchar2)
  is

  pragma autonomous_transaction;

  Start

  insert into executation_log (obj_name, event, time_execute)
  values(p_obj_name,p_event,SYSTIMESTAMP);

  end prc_log

  declare

  Start

  -call the log´s procedure
  prc_log (p_obj_name-online 'frist_object',
  p_event-online 'start');

  -call your drifter
  frist_object;

  -After the procedure of log´s you call compare the process start and end
  prc_log (p_obj_name-online 'frist_object',
  p_event-online "finish");

  -new
  prc_log (p_obj_name-online 'second_object',
  p_event-online 'start');

  second_object;

  -call once again, once again, once again
  prc_log (p_obj_name-online 'second_object',
  p_event-online "finish");

  end;

  -Drifter, then select table log´s
  Select *.
  of e executation_log
  order of e.time_execute

  Thank you...

• How to shorten the execution time of the NXT (TETRIX & MATRIX toolkit) brick

  Hello

  How to shorten the execution time of the NXT brick?

  (TETRIX & MATRIX toolkit, running time)

  The software is 2012 LabVIEW for LEGO MINDSTORMS

  Thank you.

  

  

  Hi 40123157,

  You use the module in an appropriate manner, and there is no simple way to improve the time of loop iteration beyond what you've done. Here are my suggestions:

  (1) the i2c commands take a long time. In your application, it may speed up if you run only move the engine only when the engine speed has changed.

  (2) for this particular example, you do not use the release of the report engine. If this VI does not need to run it can be removed.

  (3) If you need to speed up execution other than that, as a user advanced LabVIEW, you can create a copy of the VI of engines to move and change it as you choose. All you have to to the "DC motors' entry is use cluster to array on the cluster, as shown below. I think you can speed it up by running all the settings before the loop (type sensor and fixed connection configuration), and removing the value of power if you send only the values between-100 and 100.

  (4) drawing on the screen can be slow you down here.