How to Pixellate Images - Easily





Introduction: How to Pixellate Images - Easily

This quick one is a technique for using pixel censorship to preserve anonymity, dignity etc on digital images.
You only need a simple image editor such as MS Paint, I use MS Paint.

For an alternative, see this Instructable

Step 1: The Shrink

Open the image with Paint which is usually in Programs > Accessories > on the Windows Start menu.

Use the rectangular Select tool to select the area you wish to pixellate.

Look to the lower right of the Paint window, the dimensions of the area will be shown as you drag the mouse. Select an area that is a whole multiple of 10 (see step 3 for more on this).

From this point onwards don't touch the image or the right hand toolbar with your cursor - only use the menus.

From the Image menu, choose Stretch/Skew... (CTRL-W)

Reduce the size of the area both horizontally and vertically. Here I am making the area 10 x smaller by selecting 10%.
In doing this shrink there will be 100 times fewer pixels in the selection.

Step 2: The Stretch

From the Image menu, choose Stretch/Skew... (CTRL-W) again.

Paint can't stretch selections more than 500% (5 x) so to increase the selection back to it's original size I need to stretch by 500%, then repeat the stretch at 200%.

If the finished result isn't what you wanted, note what isn't right about it, hit CTRL-Z or From the Edit menu choose Undo and start again.

Step 3: Fine Tuning

These should be self-evident:

If the pixels are too large, you have shrunk the selection too far. If you think they should be half the size, only shrink half as much.

If the pixels are too small and they don't obscure the image enough, the selection needs shrinking more. As above if you think the pixels should be twice as big, shrink the selection twice as much.

This is more subtle:

You'll notice that in this series of images the guy on the right loses an eye. The original selection was 71 x 72 pixels reduced to 8 x 8 pixels - Paint has rounded 7.1 x 7.2 pixels up. When this was stretched back the selection ended up as 80 x 80, a little over the original size.
This is why the dimensions of the selected area are important. Look to the lower right of the Paint window as in step 1, and select 'round' dimensions which will scale back easily.
All this being said, the effect still worked.



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    Nice, and simple. Personally, if i want to hide something, i go with drawing a black or white circle clean over the top. No reconstruction program is getting past that!!

    The old fashioned 'letterbox' has a certain style to it I admit. But no reconstruction program can get back all the 5K pixels worth of data from these 64 - too much data has been lost. I should have referenced Kiteman's Unique Pixellation Indication Device, I'll go and do that now. L


    I was thinking more like this...


    Looks like something out of Who?


    But you've used something more advanced than Paint for that.

    Hmm, there was an old Star Trek episode where an alien with powers did that to a young woman (how she could breath until they got him to fix her, days later, I don't know....

    Charlie X I think you'll find. Personally I try and avoid photos of my fisog appearing on a family site for fear of frightening easily offended people!!!

    Ugh, Charlie X. I hated that episode, and still do. Freaked me out the first time I saw it (still does). Of course, it was the second episode of Star Trek I had ever seen (I quickly learned that star trek got much, much worse in some other episodes....)

    I used photoshop (as that is what i had open at work) But the same idea can be carried out on paint using the ellipse tool. Indeed it looks just like out of who! (i am a big fan)

    I forgot to say, thanks for the credit.