96 - What is Gaussian Denoising Filter?

[@namansinghal3685]

I accidentally stumbled upon this channel and wondering "WHERE WAS IT ALL THIS TIME?"...I'm going to start from video 1 all the way up to learn OPEN CV

[@adammarsonoputra4286]

How could bluring is denoising? I am learning image processing for computer vision and it is also said that blurring (spesifically gaussian blurring/smoothing) is denoising algorithm? It even makes information inside the image less clear

[@DigitalSreeni]

Good question. The answer is ... denoising is a side effect of gaussian blurring. When you select small kernel sizes the resulting image may be useful with minimal loss in information. But for large kernel sizes you may lose information due to blurring. Therefore Gaussian is usually not preferred for denoising if edge preservation or texture information is useful.

[@adammarsonoputra4286]

@@DigitalSreeni what do you think a good denoising method if I want to preserve edge and remove other noises?

[@teddybest02]

@@DigitalSreeni it can be applied for fundus photography?

[@FPChris]

Do you have a video on structured light projected color bands to denoise them and deal with color bleed? Thx.

[@alexxela8192]

at 3:35, how do we apply that matrix to the image?

[@DigitalSreeni]

Please watch full video for answer to your question.

[@shubhamshaurya951]

Suppose we have two images... One original and another one is blurr.. Now we have to overlap these two images with DCT transform then take averaging of d sample.... Then take idct..

[@manojkumarmanikonda3804]

thank you very much sir

[@kiranperveen9912]

How to Remove Haze from images??

[@DigitalSreeni]

There is no simple filter I know of for haze removal. Please search for dark channel prior for haze removal, it is an old classical approach but works fine. I do not have code ready to share for that. I think neural network approach may work better. I will have to experiment and if it works I will create a video and share the code. Here is a good reference: openaccess.thecvf.com/content_ICCV_2017/papers/Li_AOD-Net_All-In-One_Dehazing_ICCV_2017_paper.pdf

[@davidfont2596]

try increasing contrast.

[@ronaldtamsar]

Why the image size of gaussian is increase from real size of image before filtering gaussian?

[@about1082]

Is itbpossable to unblur an image

[@DigitalSreeni]

Yes, many ways. Please look up deep learning based deblurring.

[@DAYYAN294]

Thank.u sir ALLAH almighty bless u amin

[@sahil9454]

Thank you for your work

[@DigitalSreeni]

You are very welcome

[@duyphientran175]

Great

[@markcuello5]

PLEASE HELP ME

[@DigitalSreeni]

Help with what?