Marcel Janssen

I found a solution.

The PNG compessin level to 0 in the application printing properties will output correct quality for the picture.

It's just stupid that this setting is not in the VI settings. I searched for quite some time before I found this :-(

regards,

Marcel

Download File:post-5473-1168798662.vi

Hi,

I'm trying to print an IMAQ image to a photo printer using the attached VI.

Although this works, I can't get the image to scale to full paper size.

I tried using the scale function, but this somehow reduces colour so it's not suitable for printing a photo.

Does anyone know a good way to print an image using Labview ?

regards,

Marcel

Download File:post-5473-1168782617.vi

Hello

Adding the 2 directshow DLL

The following seems to work to get the application to run well on the target machine:

1) install the vision development module

2) install the vision runtime engine

3) install the IMAQ USB drivers

4) install the application

5) remove the vision development module (it is only needed to install the IMAQ USB drivers).

Now I think there must be a way to distribute the missing part of the IMAQ USB drivers along with my application. I already included two DLL's (directshow) but guess I'm still missing something.

Regards,

Marcel

Yeah - but the runtime engine is tied to the technology that you're using, and not the application you're creating Have you tried Pete Parente's Webcam Driver? It's a little experiment he did years ago, and might be good enough for what you're trying to do.

Well, the license is fine if you only distribute your application in low volume. Otherwise it does make a lot of sense to create your own library.

I tried Pete's driver, but it doesn't seem to work with my webcam. I will try a little more though before starting to create my own solution in C.

Thanks.

-----------

Well, I just managed to get my application to run well on the target machine.

The Vision runtime by itself doesn't do the job although it should. By installing the whole development module and vision assistant it works, so indicating the IMAQ USB Vi's use something which is not included in the runtime engine.

I Forgot to mention that after removing the development module the application keeps working.

See this thread on the NI Forums:

USB IMAQ & problems

Also, a low-cost solution might be Irene He's IVISION tool-kit.

Neville.

Well, I managed to install my application on the target machine but also get this error -1074396024 on my English OS.

It does indeed need the vision runtime engine which is a bit overkill. I will probably drop the use of IMAQ USB.

IVISION would be nice if it didn't need a runtime engine. I think a runtime engine is fine for heavy industrial applications, but for a small webcam application it is overkill.

No, IMAQ VI's need a run-time licence as well.. but I am not sure about the USB VI's.

Neville.

Well, the USB VI's use the IMAQ image control. If this already requires buying a license for the runtime stuff, than IMAQ will be banned from my application.

regards,

Marcel

I'm not sure specifically about IMAQ USB VI's, but for all other IMAQ VI's you need to buy a run-time licence and install the IMAQ run-time separately for your exe to work.

Neville.

I think that it's only needed to buy a license when using the NI vision toolkit or am I wrong here ?

regards,

Marcel

Hi Albert,

Good idea, I'll give that a try.

Best regards and a "goede roetsch" !

Marcel

hi,

I created a small application using IMAQ USB. The application works great on the development machine but the executable I create doesn't run on the target machine (missing VI messages).

Now, I guess I have to include some extra items (dll's) but the application builder doesn't leave me any clue to what I need to include. I will always need the target machine to be available to find out what is wrong.

Consider that I don't have the target machine at hand. How can I make 100% sure that an application will run on the target machine ?

regards,

Marcel Janssen