Pixelated

[Linda F]

I've seen a quick tip on eyewire.com that might be what you're looking for. It's at:

http://www.eyewire.com/tips/mini/nearest.html

The effect seems very simple to create.

[Doug Nelson]

That's a good tip. I've been playing with no interpolation, but it never occured to try nearest neighbor. Thanks.

[michaeld]

Hello everyone

What am I missing here?

Why not use the mosaic filter that comes with the PhotoShop-program?
It lets you specify excactly how big the pixels should be, and you dont have to resize.

To my eye this is the same result - is it not?

I wanted to put a smiley here, but I couldnt work it out

Best regards
Michael

[michaeld]

OOh I made a smiley.....wonder how?

++m

[DannyRaphael]

Linda:

Terrific tip. Just the kind of stuff we need around here. Welcome to RetouchPRO!

Michael:

And welcome to you, too. Appreciate you jumping in with a good question.

You're not missing anything re: why not use Mosaic filter? The funcational wish was to get these results w/o multiple passes of Mosaic, layer masks, etc. plus have the ability for random pixels to start "dropping out" near the edge of the image... without a lot of manual effort.

BTW: This forum software is wired to replace common stroke combinations such as colon-D, or semicolon-right paren with graphical equivalents. Click on a 'smiles icon' from the box at left (when in edit mode) to get the same results. One of the bonuses of this site!

~DannyR~

[winwintoo]

Originally posted by DannyRaphael
Linda:

BTW: This forum software is wired to replace common stroke combinations such as colon-D, or semicolon-right paren with graphical equivalents. Click on a 'smiles icon' from the box at left (when in edit mode) to get the same results. One of the bonuses of this site!

~DannyR~

For a long time, I didn't know what you were talking about Danny - I didn't have a box at the left with smileys in it. Then, I went to the UserCP area to change something else and stumbled across the vbCode option - voila! I now have the smiley box.

From the pop-out menu, select "User CP", click on the "Edit Options" button, scroll down and click "yes" to vbCodel.

Margaret

[candyflip]

Hello all,

My 1st visit to this excellent Forum and first post.

I have, I believe, an exactly similar ideal to what Doug Nelson was asking for back when this topic was raised. He wants the pixels completely separated, and rounded, and themselves not so much degraded as fuzzier (at least, that's my wish). If I had a piece of well known art I could reference for you, I would, but I can't come up with one.

So simply put : you know what a billboard photo looks like when you get close-up to it? Each pixel is a mess of CMYK color, completely unintelligible, except when viewed at a good distance. Each pixel is very close in size to the next and almost all spread evenly apart. Together, they form a whole only able to be viewed from a long way back. That's the effect we are after in PS with an Action of some type.

How's that Doug?

P.S. I've contacted a good mate of mine who runs his own printing business, as I have a hunch the answer here is very technical and requires some lateral thinking. My assumption is that PS Actions are not normally able to produce the required effect because the photo needs to be 'digitally dissected' somehow, meaning, the pixels need to be stripped into idenitifed rows and columns first, then those rows and columns pulled apart, before a final PS action is layed over the top (noise perhaps?) to make the final image work. PS Actions would be unable (I believe) to do this first part of stripping, and thats why this doesn't appear possible in that program as yet.

However, my friend points out that what happens with photos that are then turned into billboard sized posters is; that they are converted into CMYK (in other words, color separated) and then blown up (magnified) onto canvas/paper. The digital finishers they employ either do this with filters on their Macs before printing, or they let the natural process of printing images at extremely large sizes do the work for them. Follow me?

More when I have it....

jon

[Doug Nelson]

It sounds like you're speaking more about the "rosettes" that are made up of the offset printing dots. I think PS has a filter to simulate this. And you're right, it's very technical. Rosette pattern is something argued over with great passion amongst prepress professionals.

[candyflip]

Hi Doug,

Have found the PS filter to emulate this: it's Pixelate/Color Halftone, which seeks to emulate the Prepress process as talked about.

It works like this : Convert your image to CMYK 1st, then apply the filter above with the Prepress parameters of 15, 75, 0, 45 for Channels 1 thru 4. This doesn't give a perfect prepress image, I don't believe, but it's looking pretty good.

Attached is a crop of a TIFF photo I've been working on using this process. Is THIS closer to what you were after? It certainly is for me.

(Apologies for the poor quality - saved it down to 7% quality to make it under the 100K file size limit)

jon

[Axleuk]

Variation on a theme

EDIT: Oh dear, i should paid attention to the start date on this thread before i started tinkering, i just did a search on google for ' disintegrating an image+photoshop ' and this thread came up 2nd in the search results, i thought that was kind of quick even by googles standards

Note to self: Much pay more attention !!!

[tozzo]

The real stipple portraits (the ones you see in the paper each day) are drawn with a photo as the key part. Depending on the artist, they use the photo they draw from differently. The thing I have noticed about computer generated Wall Street Journal Portraits is that the size of the dot cannot be changed as easily as a hand drawn one. Check out this site to see hand drawn examples Wall Street Journal Portrait.

[Doug Nelson]

Closest yet to what I had in mind (plus it's a frog pic, always a plus):
http://www.creativepro.com/img/story...4_PSpixels.pdf

[byRo]

When I first saw this thread I thought this would be a great playground for scripting.
(Many, and public) Thanks to Danny, I've got Javascript up and running here at work.
Here's a first effort (plan to do a lot more) - did a script to punch holes, then put in some drop shadows.

Rô

[byRo]

More scripting fun.....
Rô

[Doug Nelson]

Exceedingly cool. Perhaps you could discuss how-to details over in the Scripting forum?

[DannyRaphael]

Ro...

If I may offer my "wishlist..."
* Selection based (to isolate what area got pixelated). Default = all.
* A variable that would control amount (or ~ %) of pixelation, e.g., 1 = a few random squares, 10 = lots of squares
* Ability to choose size of square
* Squares isolated on a separate layer to which layer effects could be applied.

The first and third could be based on selections (converted to named alpha channels) made via an action that goes on to call the script.

The second could come from a reply to a dialog generated by the script.

What I'd give to know JS better! In the mean time, you ROCK!

~Danny~

[byRo]

Originally Posted by DannyRaphael

If I may offer my "wishlist..."

Reply in the Scripting thread.
Rô

[byRo]

Version 3.0.....
Javascript (here) for the hard work, Drop shadows and colouring for the ornaments.
Think I'm almost there!

Rô

[byRo]

Version 4:
Last try at this script..... maybe(?)
Rô