Tutorial 33 - Image filtering in python - Median filter for denoising images

[@AIinAgriculture]

Thank you sir for your valuable content. I did many paid courses on Udemy, but I did not get such great content. I am proud of you sir. I am from Telangana, India.

[@ZEISS_arivis]

I am glad you find this content useful.

[@94_swapnilpandey20]

great initiiative from your part sir!

[@zackper]

Awesome video sir! Well explained and good editing. Thank you!

[@ZEISS_arivis]

My pleasure!

[@ruchidesai9032]

Hello Sir..In this code we are taking only one image how to take whole folder or multiple images?

[@十五田]

Thanks for this excellent videos. May I know how to get the images you used in your lecture?

[@ZEISS_arivis]

I added a few images to github: github.com/bnsreenu/python_for_image_processing_APEER

[@十五田]

@@ZEISS_arivis o Thanks for sunch kindly reply

[@bipinkoirala2962]

Would it be possible to hard code the median filter? I guess it would take a long time to run though.

[@max_nadolny]

Hi. The median filter is too blurry in my opinion. It makes images too smooth. I'd like to try sigma filter for a noise reduction. But I don't know which library has its implementation. My question is, do you know any library where sigma filter has been implemented? Thanks.

[@shubhamtiwari1415]

while applying the median filter using skimage just as you mentioned, I'm getting an error message: 'filter footprint array has incorrect shape.'

[@shubhamtiwari1415]

Ok, I just realised this error is b'coz I used an RGB image instead of a grayscale one

[@iftikharnaseer]

nice video sir

[@ZEISS_arivis]

Thanks and welcome

[@raphaelmachado9437]

The last filter is not good for gaussian noise bcs it does a MEDIAN JOB.

[@priyasurenthran]

Thank you for this video but it shows error. OpenCV(4.4.0) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-k8sx3e60\opencv\modules\imgproc\src\median_blur.dispatch.cpp:283: error: (-215:Assertion failed) !_src0.empty() in function 'cv::medianBlur' :(

[@ZEISS_arivis]

The error indicates that there is no image. Please check your path name for the image and make sure it is read properly into python.

[@priyasurenthran]

@@ZEISS_arivis Thank you will check on it.

[@geetasorate3732]

Thank you sir for this very good video & well explained but sir i got this kind of error. runfile('C:/Users/abc/.spyder-py3/pro2.py', wdir='C:/Users/abc/.spyder-py3') Traceback (most recent call last): File "C:\Users\abc\.spyder-py3\pro2.py", line 15, in median_using_cv2 = cv2.medianblur(img, 3) AttributeError: module 'cv2.cv2' has no attribute 'medianblur'

[@ZEISS_arivis]

Not sure of the error as I never encountered it. A quick Google search suggested pip install opencv-contrib-python stackoverflow.com/questions/44633378/attributeerror-module-cv2-cv2-has-no-attribute-createlbphfacerecognizer