can't find vision acquisition express VI in control palette

[Parvathi]

still it is not solving the sorting issue. There should be some means to go with the diameter of the coins. will thresholding , particle filter or particle filter take care of that

[guangli]

Hi, Muks,

Thank you very much for your reply and kindness!

I'm not sure if I need to open a new thread for the following question?

I kind of have the same error with Error Message -1074395247: Invalid template descriptor .

this error is not because I run the code likes " Pattern matching example".

It is because I get the static image a few minutes when USB camera is on. And I use command "CWIMAQVision.ReadImageAndVisionInfo", which need to set the path. In my case, I don't have to save the image. The only what I need really is a temp image to get the position of point such as the centroid. 

Likes this coin sorter, we only need to get a temp image and compare it with template, which may extract from the first image of one coin. So, we don't have to save these images, right? I am stuck by this for a long time. 

Thank you very much!  

Guangli 

[Parvathi]

Can I hold  many images in Golden template as reference image?

and compare those with the single acquired image??

[Parvathi]

Can I hold many images in Golden template as reference image? and compare those with the single acquired image??

[Parvathi]

Can I hold many images in Golden template as reference image? and compare those with the single acquired image??

[muks]

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Parvathi wrote:
still it is not solving the sorting issue. There should be some means to go with the diameter of the coins. will thresholding , particle filter or particle filter take care of that

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I am going to tell this one last time. You cant measure using template matching.You can measure using particle filter. Can you post what you have tried?

[muks]

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guangli wrote:

Hi, Muks,

Thank you very much for your reply and kindness!

I'm not sure if I need to open a new thread for the following question?

I kind of have the same error with Error Message -1074395247: Invalid template descriptor .

this error is not because I run the code likes " Pattern matching example".

It is because I get the static image a few minutes when USB camera is on. And I use command "CWIMAQVision.ReadImageAndVisionInfo", which need to set the path. In my case, I don't have to save the image. The only what I need really is a temp image to get the position of point such as the centroid. 

Likes this coin sorter, we only need to get a temp image and compare it with template, which may extract from the first image of one coin. So, we don't have to save these images, right? I am stuck by this for a long time. 

Thank you very much!  

Guangli 

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Do you mean to say you want to create templates dynamically?

[guangli]

Muks, Thank you for asking! 

No, I just want to get the template in first shot from UAB Cam. Then I will get static image per minute(example) from USB Cam. I will search template in these static images right after I got one. I will tell the position when I find the template. Actually, the template is only one point with some stuff, like braiding point with braids. After I get the position, I will decide to tell how the motor move.

[muks]

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guangli wrote:

Muks, Thank you for asking! 

No, I just want to get the template in first shot from UAB Cam. Then I will get static image per minute(example) from USB Cam. I will search template in these static images right after I got one. I will tell the position when I find the template. Actually, the template is only one point with some stuff, like braiding point with braids. After I get the position, I will decide to tell how the motor move.

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can it be done in this way

1. You create a template.

2. The position accuracy you determine by thresholding and particle analysis.

3. You apply the template to see the match.

 

[guangli]

I'm not sure what's your means really. My template likes the attached images. I use the rectangle to define the ROI. When I define the ROI, I try put the centroid of the rectangle to braiding point. That means I'm going to find the braiding point when I find the ROI. Then I know the position of centroid. Actually, I could get the position of centroid when I open the image inside folder by some LV commands with path operation. My problem is kind of that I  cannot operate the image just after I get from the USB cam without saving. In fact, I need to track the motion of the braiding point.So, I really don't have to save the images since I only need get the position difference between sequent frames.