face authentication in labview

[rudra386]

i am doing a project on face authentication using labview .i am using vector quantization algorithm. i have just started my project.

can anybody suggest me how to vectorize an image ???

[ThiCop]

Hello rudra,

I think this case study might be interesting for you:

https://www.ni.com/en/innovations/case-studies/19/developing-face-recognition-software-using-labview...

It might also be a good idea to start by taking a look at the IMAQ VI's, like for example:

https://www.ni.com/docs/en-US/bundle/ni-vision-labview-api-ref/page/imaqvision/imaq_overlay_motion_v...

Also interesting might be this thread:

https://forums.ni.com/t5/Machine-Vision/how-to-track-face-and-allocate-lips-in-face-using-labview/m-...

[rudra386]

Thank you very much sir for the help. i have another doubt. for a given image what will be its dimension. i mean if the pixel value of the image consists of an array of size 20*20 then then what will be the  dimension of that image???

[ThiCop]

Hello Rudra386,

What do you mean exactly with its dimension?

Do you mean how big it will be (size) on the screen?

I this is your concern, then please keep in mind that you can always "zoom in" on an image:

https://www.ni.com/docs/en-US/bundle/ni-vision-labview-api-ref/page/imaqvision/imaq_windzoom_2.html

This is just one way to do this.

There also some nice examples available online that concern the zooming of images:

https://forums.ni.com/t5/Example-Code/IMAQ-Active-Zoom-Example/ta-p/3501578

https://forums.ni.com/t5/Example-Code/Zoom-in-on-ROI-of-an-Image-at-Cursor-Location/ta-p/3528525

[rudra386]

how to add N no of rows(N is very large say 1000) from a 2d array and get the output as a single row?

plz suggest.

[ThiCop]

Hello Rudra,

Here's a simple suggestion.

Please let me know if it does the trick.

[rudra386]

thanks a lot sir .sir how do i insert a null value into an array.i tried but still zero values are automatically assigned to the rows in the array.ive attached the vi and im using labview 2010 version.idont hv a version 11.sir i need to avoid the zero rows from the arrays D1 and D2.

[rudra386]

sorry sir im sending the vi again coz the previous one had reference values.

[ThiCop]

Hello rudra,

I don't really get what you're trying to do.

Are you trying to insert a "NULL" value inside your array?

Or do you just want to write either to one array or to the other, depending on the results of the comparison?

Kind Regards,

[rudra386]

yes sir.. i  want to write either to one array or to the other, depending on the results of the comparison..