Blurring Image by IMAQ low-pass filter (LabVIEW student edition 2017)

Hello everyone,

I'm having trouble with using the IMAQ low-pass filter VI. I'm obtaining images, from which plotting a band of image pixels. The x-axis shows pixel position (image's width) while the y-axis is pixel intensity. There is noise in my images and I want to apply the low-pass filter in order to easily detect the right peaks. However, I get the output image 100% similar to the original image after using IMAQ low-pass filter. I'm wondering if anybody can help me use this VI properly.

Thank you!