The Imaging Source Community - IC Imaging Control ActiveX

Error : Buffer not initialized when changing video format

acanicio — Sat, 28 Aug 2010 08:11:08 GMT

Dear Stefan,

Here I am again with another little question.
With a DBK camera, when changing the videoformat from any video format to another video format (i.e. for example when switching from Y800 to BY8, or YGB0 to Y800 or BY8 to UYVY), I often get (but not always) the following error :
<<
The Membuffer is not valid (maybe it is uninitialized or the format of the given MemBuffer does not fit to the current colorformat/videoformat).
>>

http://www.astrosnap.com/divers/phot...nitialized.jpg

In my code, whenever I change the videoformat property, I always change the MemoryCurrentGrabberColorFormat property to the corresponding value, in order to always match the new videoformat :

Code:

procedure TFRM_CamPropertyDlg.CBX_VideoFormatsChange(Sender: TObject);

begin

If ICImagingControl.DeviceValid then

   Begin

      If ICImagingControl.LiveVideoRunning then

         begin

            ICImagingControl.LiveStop;

            ICImagingControl.OverlayBitmapPosition := PATHPOSITION_NONE;

            ICImagingControl.VideoFormat := ICImagingControl.VideoFormats[CBX_VideoFormats.ItemIndex+1].Name;

            ICImagingControl.SinkCompatibilityMode := True;

            ICImagingControl.MemoryCurrentGrabberColorFormat := GetGrabberColorFormat(ICImagingControl.VideoFormat);

            ICImagingControl.SinkCompatibilityMode := False;

            ICImagingControl.DeviceFrameRate := ICImagingControl.DeviceFramerates[CBX_Framerates.ItemIndex+1];

            If @VideoFormatChangeCB <> Nil then

               Begin

                  VideoFormatChangeCB(Self.Camera,CBX_VideoFormats.Text);

               End;

            Sleep(500);

            ICImagingControl.LiveStart;

         End

      else

         Begin

            ICImagingControl.OverlayBitmapPosition := PATHPOSITION_NONE;

            ICImagingControl.VideoFormat := ICImagingControl.VideoFormats[CBX_VideoFormats.ItemIndex+1].Name;

            ICImagingControl.SinkCompatibilityMode := True;

            ICImagingControl.MemoryCurrentGrabberColorFormat := GetGrabberColorFormat(ICImagingControl.VideoFormat);

            ICImagingControl.SinkCompatibilityMode := False;

            If @VideoFormatChangeCB <> Nil then

               Begin

                  VideoFormatChangeCB(Self.Camera,CBX_VideoFormats.Text);

               End;

         End;

   End;



end;

Code:

Function GetGrabberColorFormat(VideoFormat : String) : ICImagingControlColorformats;

   Begin

      If Pos('BY8',VideoFormat) > 0 then

        Begin

           Result := ICBY8;

        End

      else

         If Pos('UYVY',VideoFormat) > 0 then

           Begin

              Result := ICUYVY;

           End

         else

            If Pos('Y800',VideoFormat) > 0 then

              Begin

                 Result := ICY800;

              End

            else

               If Pos('YGB0',VideoFormat) > 0 then

                 Begin

                    Result := ICYGB0;

                 End

               Else

                  If Pos('YGB1',VideoFormat) > 0 then

                    Begin

                       Result := ICYGB1;

                    End;



   End;

The error does NOT appear all the time. It does happen once every 7 or 8 changes, and it appears when in the "imageavailable" event is triggered and I do the following :

Code:

  Var CurrentBuffer : ImageBuffer;

   Begin

    //SNIP//

     CurrentBuffer:= Control.ImageBuffers.Item[BufferIndex];

    //SNIP//

   End;

Is there something that I forget to do ? Or is there some lag time that I must respect in order to wait for the changes to the video format to be completely applied ?

Thank you again for your help :-)
Best regards
Axel

4 cams at once

TMs — Tue, 27 Jul 2010 12:53:34 GMT

Hello,

i have a new problem...I work in a LV 8.5 and i have four cameras that i would like to see in front panel... everything works ok if there are 3 or less, but when i add the 4th camera it crushes...

Is there maybe a limitation on how many cams can you run at the same time?
Does anybody have a solution to this problem :)

With best regards

TM

grabing image and displaying it live

TMs — Fri, 23 Jul 2010 08:55:57 GMT

Hey guys,

well i have a problem and hope that you can help me out. I am working in LabView 8.5 and what i want to do is get image from usbcam DFK 51AUC03, and display it front panel with a crosshair on. I also want to open external window with a click on a display that's on front panel, which will display original size picture in live mode.

The first problem i am facing is that IC_grab_image doesn't delete the image and i run out of memory so i have to reset it every 50 frames so the buffer doesn't get to full. This works quite fine but i don't like the blinking every time it resets. . Is there any possibilty to make crosshair already on ICImagingControl window on front panel so i don't need to use the IC_grab_image?

Second problem is with my external window - i can open it and display image live, but with my VI solution i can close it only if i press the same button for the external window again. Does anybody knows how to display a live video in new window, that can be closed by pressing the red cross close icon on new window?

I am attaching you my VI and hopefully somebody will know how to solve my problem...

Attached Files

cam1.rar (48.1 KB)

UYVY format in the image buffer ?

acanicio — Sun, 27 Jun 2010 17:23:57 GMT

Dear Stefan,

With the DBK41AG02.AS camera, when asking the ICImagingControl component to issue images using UYVY format, what is the format really used in the imagebuffer ??

Is it really UYVY ? or is it something else ?

I'm trying to decode the contents of the imagebuffer using an algorithm (UYVYtoRGB) that I have already used in the past, and the image is all scrambled.
When I don't decode the image, I just get a proper greyscale image.

Am I missing something ?

Thank you.
Best regards
Axel

Labview 2009 crashes when IC.ImagingControl3 Class is inserted

ttp14 — Thu, 24 Jun 2010 12:05:48 GMT

We are using several computers with labview 2009 in our labs. Most of them are working fine with the IC-Labview extensions, but on two of them (identical new DELL's) Labview 2009 crashes when the IC.ImagingControl3 Class is loaded.
The problem does not appear when labview 8.2 is used (but we do not have a license). There are no error messages or log files. We reinstalled Windows 7 on one of the DELL's but labview keeps crashing.
Because we are not facing such problems on any other workstation, i think its some kind of a hardware incompatibility. Is there a known bug? Has anybody an idea?

Here is the hardware setup of our DELL Vostro 220:
http://support.dell.com/support/edoc...rg/sqrg_en.pdf
We have the E5300 2.6GHz processor

Windowless ActiveX

m.hanussek — Wed, 23 Jun 2010 10:12:18 GMT

Hi,

i'm programming in Visual Studio 2005 C# .NET.
Using IC 3.0.6.

Everything is fine as long as i run the programm from the Visual Studio.

But if i want to start the .exe file i'm running into the following error:
"System.Reflection.TargetInvocationException" ind System.Windows.Forms.dll.

"Windowless ActiveX Usercontrols are not allowed"
(translated from german).I want to start the programm on a Vista-PC.

Thanks for your help.

Marc

VCDID_WhiteBalance : rangeproperty not found...

acanicio — Wed, 16 Jun 2010 21:15:30 GMT

Dear support forum,

After 6 months without touching a single line of code, I'm back trying to get everything working with ICImagingcontrol and Delphi.
I've stopped using the ActiveX properties and started using the VCDSimpleproperties instead.

I'm trying to read the properties of a TIS 41AG02.AS camera (color) and have an issue with the VCDID_WhiteBalance property
Even though the VCDProp.Available method says that the property is available, when I try to read it (for example, trying to get the min range value) I get the following error message.
This happens when stepping into the GetVCDPropertyRange procedure, GetRangeMin method and finally fetchCheckedRangeItf function.

Quote:

Rangeproperty
{284C0E0D-010B-45BF-8291-09D90A459B28]:{B57D3000-0AC6-4819-A609-272A33140ACA}:{99B44940-BFE1-4083-ADA1-BE703F4B8E03} not found

Of course, it is a custom message, but I don't understand why the available method returns "true" and then the range property is not found...
Does the VCDID_WhiteBalance property have to be used/read in a particular way ?

Here are the bits of code used.
(TRB_WhiteBalance is a TTrackbar component)
(Enabled is a boolean property of TRB_Whitebalance)

declarations :

Code:

TmpVCDProp : TVCDSimpleProperty;

Main part

Code:

      With Form.TRB_Whitebalance do

         Begin

            Enabled  := TmpVCDProp.Available(VCDID_WhiteBalance);

            If Enabled then

               GetVCDPropertyRange(Form.ICImagingControl,TmpVCDProp,VCDID_WhiteBalance,MinValue,MaxValue,Value,Auto);

            Form.LBL_WhiteBalance.Enabled := Enabled;

            Form.EDT_WhiteBalance.Enabled := Enabled;

            Form.UPD_WhiteBalance.Enabled := Enabled;

            Min      := Round(MinValue);

            ASCamera.CameraProperty[ASVideoProcamp_Whitebalance].MinValue := Min;

            Position := Min;

            Max      := Round(MaxValue);

            ASCamera.CameraProperty[ASVideoProcamp_Whitebalance].MaxValue := Max;

            Position := Round(Value);

            ASCamera.CameraProperty[ASVideoProcamp_Whitebalance].Value := Position;

         End;

GetVCDPropertyRange procedure

Code:

Procedure GetVCDPropertyRange(Control : TICImagingControl;VCDProp : TVCDSimpleProperty;

                           const ItemID : WideString;

                           Var Min,Max,Value : Double;

                           Var Auto : Boolean);

Begin

   if Control.DeviceValid = True then

      begin

         Min := VCDProp.GetRangeMin(ItemID);

         Max := VCDProp.GetRangeMax(ItemID);

         Value := VCDProp.GetRangeValue(ItemID);

         Auto := VCDProp.AutoAvailable(ItemID);

      end;

End;

GetrangeMin description

Code:

Function TVCDSimpleProperty.GetRangeMin(id : WideString) : Longint;

   Var RangeProp : VCDRangeProperty;

   Begin

      RangeProp := fetchCheckedRangeItf(id, internalTree);

      RangeMin := RangeProp.RangeMin Div RangeProp.Delta;

      Result := RangeMin;

   End;

Code:

Function fetchCheckedRangeItf(itemId : WideString; props : VCDPropertyItems) : VCDRangeProperty;

   Var

       irange : VCDRangeProperty;

       itf : VCDPropertyInterface;

       id : WideString;

   Begin

      If itemId = VCDElement_WhiteBalanceBlue Then

        id := VCDID_WhiteBalance + ':' + VCDElement_WhiteBalanceBlue

      Else

      If itemId = VCDElement_WhiteBalanceRed Then

        id := VCDID_WhiteBalance + ':' + VCDElement_WhiteBalanceRed

      Else

      If itemId = VCDElement_GPIOIn Then

        id := VCDID_GPIO + ':' + VCDElement_GPIOIn

      Else

      If itemId = VCDElement_GPIOOut Then

        id := VCDID_GPIO + ':' + VCDElement_GPIOOut

      Else

      If itemId = VCDElement_StrobeDelay Then

        id := VCDID_Strobe + ':' + VCDElement_StrobeDelay

      Else

      If itemId = VCDElement_StrobeDuration Then

        id := VCDID_Strobe + ':' + VCDElement_StrobeDuration

      Else

        id := itemId + ':' + VCDElement_Value;

      id := id + ':' + VCDInterface_Range;

      Try

         irange := VCDRangeProperty(props.FindInterface(id));

         If irange <> nil Then

            result := irange

         Else

              ShowMessage('RangeProperty '+ id + ' not found');

      Except

              ShowMessage('RangeProperty '+ id + ' not found');

      End;

   End;

The other VCDID_xxxxxx properties work perfectly, I have the issue only with this VCDID_WhiteBalance property.

Thank you for any idea.

Best regards
Axel Canicio

Win32 API Application

vzv55 — Thu, 13 May 2010 09:23:13 GMT

I need simple application written by API (C\C++ laguage)
where i can get live image.

I have Video Capture Device DMx 41AUC02(usb camera)
thank you very much!

Overlay problem

exavision — Wed, 28 Apr 2010 17:10:01 GMT

I need to do a simple video application (with your PCI frame grabber) in order to :
- viewing the live video
- grabbing bmp picture
- overlay lines on the live video

I tried to do many actions :
- I used your ActiveX component with Windev 15. I made a software that realises all theses actions, and it runs very well on my computer. But when I want to use it on an other computer, I've got an error with the StartLive function (DShowLibException in file GrabberPImpl.cpp line 580). Do you know what is the source of the problem ?
- If I use ActiveX component with MV C++ 6.0, I don't find how to use the overlay functions. Do you have samples for me ?
- Other issue for me : Do not use the ActiveX component. But do you have sample code of your "Overlay Sample" software for Visual C++ 6.0 ?
Thank you for your help
Regards
C�dric PEREZ

LabVIEW, global variable

TU-Jan — Mon, 26 Apr 2010 19:42:01 GMT

Hi!

I am using LabVIEW 8.2 with IC Image Control 3.0.

Currently I am facing the following problem:
I have one central vi for configurations of the video stream of a USB camera.
So the imagecontrol and its configuration are in there, as well as a display ( from imagecontrol) of the current camera output on the front panel.

I would like to have the the display on the front panel of another vi though, because I want to view the live camera-output on another screen (which is still connected to the same PC).

I tried to define a global variable containing an imagingcontrol.ctl but the global variable could not receive the camera output, so the displaying vi could neither...

Is there a possibility to transfer the camera data to another vi?
Could I use pointers? If yes, how would I do that in labview?

I would be glad about any hints or help ;)

Jan

Question about Mem-Leaks

ronnie.b — Tue, 13 Apr 2010 08:07:07 GMT

Hello,
I�m using IC-Control ocx V3.0 in a VC++6.0 App.
Are there any known Memory-Leaks in this OCX or the Wrapper classes?

Ronnie

Trouble capturing images using multiple while loops

futuramaar — Tue, 09 Mar 2010 19:16:13 GMT

I am working on a VI to control a firewire camera. I am currently using a while loop with an event structure inside to control the cameras functions. I also want the camera to be able to start recording images to a folder when a button is pressed and stopped when a stop button is pressed. I wasnt able to get this function into the original while loop but I added another while loop however it doesnt work. I attached an example where the first while loop is simplified (it only contains a displayvideoproperties node) In my actual VI the first while loop has about 10-15 different cases for various functions such as digital subtraction, triggering, etc.. How would I get these parallel while loops to work together or how would I get the second while loop into the first?

Attached Files

example.vi.zip (16.4 KB)

Trouble with gain property

futuramaar — Thu, 18 Feb 2010 07:43:57 GMT

I am using a property node to set gain with an integer numeric control. I have an event structure, and one event is a value change in the numeric control. It is set up in the event structure so that live stop is invoked then the gain is set then a live start is invoked. This however doesn't work and always produces an error. I dont know what to do. I want there to be a button that sets the gain for the camera on the front panel. I dont want the user to have to open the video properties box and change the gain through there.

Problem with saving to multiple paths

futuramaar — Thu, 18 Feb 2010 07:39:39 GMT

I am using the invoke node for imagining control with labview to invoke snap sequence. Everything works fine as I have it with the filename string attached to a convert path to string and that is attached to a path constant. However I want to use the file dialog function under file I/O on the functions palette then under advanced file functions. attaching a path to this allows a dialog box to appear prompting the user where to save the image. This however doesnt work when the sequence being saved has more than one image. How do I get it to work with the file dialog function so that it will prompt the user where to save the images.

Running more than 1 Application

ronnie.b — Thu, 04 Feb 2010 15:05:58 GMT

Hello,
I tried to Use 2 Applications with 2 different Cams on 1 PC.
The Application i started first works great but if I try to view Live-Picture of the 2nd Application I get an Error:
An unexpected DShowLibException occured: Error=startLive failed.
VideoCaptureDevice = DMx 41AF02 1
VideoFormat = Y800 (1280x960)
In File : ".\GrabberPImpl.cpp" at line: 580

First I thought the problem is my App but I have the same problem with an sample-app from TIS.
In Summary I need to Run 3 Cams(3 Apps) on one PC.