Image processing

[Omar-Abdelhameed]

Thank you Andrey. Is there other option to done that without Vision Development Module ?!

[GerdW]

Hi Omar,

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@Omar-Abdelhameed wrote:

Is there other option to done that without Vision Development Module ?!

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Yes.

Load the JPG image as shown above and analyse the pixmap data on your own.

(You need to re-implement all those IMAQ routines with your own LabVIEW code…)

[Andrey_Dmitriev]

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@Omar-Abdelhameed wrote:

Thank you Andrey. Is there other option to done that without Vision Development Module ?!

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Yes, sure, but here you will need to invest more time. You must be able to open the image as a 2D array of pixels, then you can do almost everything — get the line profile along the marks (it's better to do this not at a single line, but average multiple pixels in the opposite direction — this will give you better signal to noise ratio and will remove small dust particles, etc.). Then you will need some kind of edge detector (Sobel/Canny) or peak/valley detector to detect the marks and count them. You don't need to implement Vision Development Functions 1:1 (and you can't, because details of the internal processing are not always known). If you don't have experience with image processing, I would recommend to read some books first (for example, 'Digital Image Processing' by Rafael Gonzalez and Richard Woods).

[zou]

Here is one way without using IMAQ:

[Omar-Abdelhameed]

Thanks Zou, but it didn't count the lines?!

[Andrey_Dmitriev]

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@Omar-Abdelhameed wrote:

Thanks Zou, but it didn't count the lines?!

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You should simply go through waveform chart and count how many times you changed from 0 to 1.

Something like that:

[Omar-Abdelhameed]

Thanks Andrey, I got that, sorry but it's my first time use LV with images.