Posts by Bingnan Liu

Quote from kevinh

Dear Bingnan,

Thank you for reaching out. The ImageTrigger Box is for accessing the camera, my question is what do you exactly mean by a trigger signal. Do you want to trigger the Camera again if you detect the circle, or do you want to acces the GPIO pins from the frame grabber? If it is the latter, I have attached a small VA example on how to access these.

Please let me know what do you need in detail.

Greetings,

Kevin

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Dear Kevin,

may I ask

- where is the parallelism error from? (I assume both the operator "Less" and "PixeltoVal" should be single I/O)

- Also, is the operator "CoordinateY" only read the pixel value of Y ordinate and make the pixel values as a stream, so that is kind of line scanning?

Best

BL

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Quote from kevinh

Dear Bingnan,

Thank you for reaching out. The ImageTrigger Box is for accessing the camera, my question is what do you exactly mean by a trigger signal. Do you want to trigger the Camera again if you detect the circle, or do you want to acces the GPIO pins from the frame grabber? If it is the latter, I have attached a small VA example on how to access these.

Please let me know what do you need in detail.

Greetings,

Kevin

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I meant the GPO trigger. The example seems helpful, thank you!

Dears,

Thank you a lot for your information. I am trying to output a trigger signal if the desired object (the small circle) detected, The hierarchical box ImageTrigger seems not suitable and complicated. To implement this simple IF-THEN function, is there another proper way?

Best

Bingnan

I selected the "inside little circle" as a template instead of the whole droplet, but the result seems weird?

Quote from Bingnan Liu

Hi

I noticed that for the 'NCC' operator, the K_NumberOfObjectPixels is a value limited to [0,500]. Is that mean the size of the template is limited to the total pixels of 500? Would it be possible to use a larger template?

Thanks

Because I found out that the template is not correctly detected - now all droplets are detected by the template. The template image, which the target aimed to be detected, is a circle within one small circle inside (a droplet with one particle inside). The droplet without particle inside, for example, aimed not to be detected. Is there any suggestion to improve the design to complete the classification more accurately?

Hi

I noticed that for the 'NCC' operator, the K_NumberOfObjectPixels is a value limited to [0,500]. Is that mean the size of the template is limited to the total pixels of 500? Would it be possible to use a larger template?

Thanks

Quote from CarmenZ

Dear Bingnan,

thank you for the description of the problem and the VisualApplets design with the corresponding images. I had a look in your design and found that the content of the FIRoperators "Rmean_Mult_K" and "Sum_RxR" are not adapted to your template image. These operators need to be adapted as well as the threshold for visualization. Please see details in the comment box on the top level of the design and under https://docs.baslerweb.com/vis…izedCrossCorrelation.html

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Dear Carmen,

Thank you for your reply, could you please the attachment at #9, the design loaded the values from the Matlab code.

Best

Bingnan

And here is the template.

My goal is to detect the droplet with the number of one particle, as the template shows. I am not sure if there is a better way than template matching.

Hi

I downscaled both template and background images 6times, and followed the instruction on the text box and adjusted my design and images. The result like thispasted-from-clipboard.png

I am not sure if it properly detected the template-like object, and the area of the pixel with the value 255 seems weird. Is this the problem with the threshold value? Or the template?

Thanks

Bingnan

Thank you for your advice

I am trying to use my images, but the result shows failed (blank image)

I loaded my .txt file into the FirOperator in the NCC hierarchical box. The text file is from the 12x12 Downscaled image I made by OpenCV.

Could you please check what is the problem? (I noticed that there are other FirOperators in other hierarchical boxes, but I suppose the parameters there are from FIRkernal and don't need to be changed)

Greetings

Bingnan

Quote from kevinh

Hi Bingnan,

You can use the Operator "SplitComponents" to divide the input image in its three componets (R,G,B) and then compute the filter on each one. To combine the results together again to one RGB Image use the operator "MergeComponents"

Greetings

Kevin

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I think the problem is that I am using the gray camera operator, how should I modify the design? (change the RGB settings)

Hi I have downscaled the subimage into 12x12. A problem is that the link property. How should I change the parameter from RGB to gray?

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Hi ,

I am tryin to do the template matching: I tested the provided example "normalized cross correlation". The example seems to detect the object with dimension of 12 pixels by using the operator FIR kernel 12x12, is this correct?

I want to match an image using sub-image as template, how should I revise the design?

Thanks

Bingnan

Thank you, may I ask what are the rules to set the parallelism and width?

Here is attached design

I am trying to revise the example "PrintInspection" to convert to my platform mE5-VCX-QP. I replaced the dummy camera with the operator, but there appeared an error with the parameters:

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WHat caused this problem? How should I revise these parameters?

Best

Bingnan