Blur tool on large images.

[hdcel]

I have some issues with the Blur tool.

It works fine, when I use it on a small image. e.g. 500x500.

If I use it on an image that is 5000x5000, nothing happens when I use the tool.

All settings are set to 100%, I am on the correct layer

Is this a bug, or is there a setting or work around.

I do not wat to use the Blur filter.

[Callum]

Hi Hdcel,

Welcome to the forums

This seems to be working fine for me here, please could you provide a screen recording or sample file that demonstrates this issue?

Thanks
C

[NotMyFault]

The blur tool has a very subtle effect. You can only see the effect if zooming in to 100%.

A better way to create a blur is this method:

1. add a live Gaussian blur filter
2. set radius to taste, e.g. 2 or 4px to start 
3. invert the inherent mask
4. select brush tool
5. set settings as required (hardness 50–80%, opacity 10-30%, color white)
6. brush over blur filter to apply blur where you need it.

the big advantage of this method is you can always change the blur radius and the area where it gets applied any time later.

You can use my blur filter.

 

[R C-R]

1 hour ago, hdcel said:

I do not wat to use the Blur filter.

Can you tell us why you do not want to use it?

[Old Bruce]

2 hours ago, hdcel said:

It works fine, when I use it on a small image. e.g. 500x500.

If I use it on an image that is 5000x5000, nothing happens when I use the tool.

Are you viewing both sizes at 100% zoom? Or are you viewing them zoomed to fit (the screen)? Really should be viewed at 100%.

[hdcel]

Its much easier to control the brush for the blur on certain areas, that's why I use the Blur tool.

 

Here is a link to a video.

https://www.dropbox.com/s/din2o0jlg8ffyhn/affinity-blur.mov?dl=0

Image is 5000x4000, then the blur does not appear, then I scale the image to 500x400, and then I can blur.

 

I know there are a lot more pixels in the larger image, but it should be possible to blur it.

[R C-R]

14 minutes ago, hdcel said:

Here is a link to a video.

I get a 'can't open' message for that. Would it be possible for you to attach the actual video to a post? Just drag it into the area at the bottom of the reply window where is says 'drag to attach...'

[hdcel]

Get this error when Trying to upload the video

[hdcel]

Now it works

[Gripsholm Lion]

35 minutes ago, hdcel said:

It's much easier to control the brush for the blur on certain areas.

Is it though? If you can control that brush, you can control a brush on a mask just as easily.

It is not as easy to see where exactly it has been applied with this method as it is with a mask; and it is not as flexible as the already-suggested filter and mask.

What you seem to be asking is "why can't I hammer this screw in; I don't want to use a screwdriver."

[R C-R]

37 minutes ago, hdcel said:

Now it works

I think what you are seeing is a consequence of there being 100 times as many pixels in the larger version, so even though the blur brush is working on it, you won't see much effect with a 75px brush, compared to the proportionally much larger 23 px brush on the smaller version.

Maybe try zooming way in in the larger version so you can see individual pixels like you can in the smaller version.

[NotMyFault]

And check what brush is active by clicking the "more" box in the window toolbar. 

 

[iconoclast]

Try it with a bigger brush. The strength of the blur effect depends on the size of the brush in relation to the pixels.

[hdcel]

Doesn't help to change the Brush.

I do agree that its a lot more pixels, and it help to make the brush bigger, but the result is almost impossible to see.

I guess its the blur filter that needs to be used in this case.