## Do Blink, Blur, normal concealment & Displacement stack?

Just what the title says, Do Blink, Blur, normal concealment & Displacement stack? Do any of them stack? Do all of them stack? Which ones, if any?

## Mathematics behind Motion Blur

Recently I understood how the Gaussian Filter works and I was awed by the beauty of the mathematics behind it. Now while doing some coding stuffs in Octave I came across another type of blur, which is mentioned as $$image$$ $$blur$$, and it gave me an output like this,

It is beautiful, but i cannot find on the internet any explanation on the mathematics behind it?

Everywhere I searched $$Gaussian$$ $$Filter$$ is popping up, but i believe that this 2 are different to some extent as $$Gaussian$$ $$Filter$$ gave me this output–>

Which u can clearly see is $$different$$ in appearance than the $$motion$$ $$blur$$.

So, my question is, how is motion blur implemented?

## Photo blur background effect in photoshop for \$10

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Viewed: 226

## Background blur for 18.04 unlock screen

I have added a background image to unlock screen of 18.04 using the below code in `ubuntu.css` in `usr/share/gnome-shell/theme`

``#lockDialogGroup { background: #2e3436 url("unlock-background.jpeg"); background-repeat: none; background-size: cover; } ``

While it works great, is it possible to add a blur effect to whatever image we are using as unlock screen background ? Thanks.

Eg. Something close to the blur below

## Zoom and Blur Modal Nesting

Hi all,

Just trying to create a modal that zooms and blurs the background back. Based on avgrund by hakim https://lab.hakim.se/avgrund/

I extended it to get several modals to work.

See fiddle: https://jsfiddle.net/postcolonialboy/9jq84p1h/144/

Could anyone please help to get nested multiple modals to again zoom and blur everything further again on popup?

Thx

## Just recovered some pictures I deleted accidentley but they are all blur

Is there a way to get the original pictures back? Please let me know!

## How does invisibility and blur interact with ongoing visual spell effects that are not light?

How does invisibility and blur interact with ongoing visual spell effects that are not light?

A character in my campaign often uses slipstream to move around because they are a merfolk, and likes the extra movement speed for both practical and flavor reasons. If they are using invisibility, can you still see the wave it creates, even if the spell was cast before you went invisible? And does this differ from spells such as blur and blurred movement?

## What is the correct settings for background blur when shooting long distances

I am new to photography any i am not sure what is the correct settings when shooting long distance landscapes.

The photo that i took is pretty blurry. Is there any specific settings or equipment when shooting long distance landscapes?

Here is an example of a photo that i took.

## Take a telephoto portrait without background blur?

Is it possible to take a portrait of someone with a telephoto lens (for example 85 or 135mm) without any background blur (or at least with minimal blur)?

I am planning to take portraits of somebody on rooftop (with the city skyline in the background). While I want to achieve the flattering compressed look of telephoto lenses on the face of my subject, I want to keep the skyline background sharp.

Would be grateful for any help!

## Can you adjust white balance in Photoshop based on average blur?

Can you adjust white balance in a digital image using Photoshop (or similar) in such a way that average blurring the entire image gives gray (R=G=B)? Note, I’m not necessarily looking to achieve “correct” color balance with this method.