Cut out only on both sides

[rururin]

I want to cut out only both sides of this illustration.

 

Is there a way to erase only the internal part?

ideal

[Alfred]

You need to be able to work at the pixel level for this, so begin by rasterizing the layer if it’s currently an ‘Image’ layer instead of a ‘Pixel’ layer. Make a ‘marching ants’ pixel selection of the entire shape, shrink the selection and then delete the selected region.

[h_d]

A slight variation...

Rasterise if necessary as @Alfred says. I then used a fairly strong Levels adjustment, dragging Black right and White left to even out any colour variations in the red:

Then click on the red area with the Flood Select tool. (When I initially tried on uploaded image, I was getting a lot of half-selected pixels - hence the step above. It may depend on the Tolerance settings for the Flood Select tool.)

From the Select menu choose Outline. Set the Alignment to Inside and adjust the Radius as required:

Click Apply, go to Select and choose Invert Pixel Selection.

Press the Delete key.

Deselect.

Cheers,

H

[rururin]

everyone
Thank you for your reply!

[From the Select menu choose Outline. Set the Alignment to Inside and adjust the Radius as required:]

I was able to reach my goal this way.

Thank you very much.

[Pšenda]

Erase White Paper, fx - Outline (inside, width as you need), layer Blend mode - Erase.

Or send this to Online Image Vectorizer (for example vectorizer.io) and convert this outline to vector, which then allows any adjustments without loss of quality.

Or download batman symbol from web 🙂