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Photo-Based Art Emulating natural-media painting techniques

Pixelated

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  #31  
Old 09-08-2002, 11:31 AM
Linda F Linda F is offline
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Eyewire tip might help

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.
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  #32  
Old 09-08-2002, 12:06 PM
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Doug Nelson Doug Nelson is online now
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That's a good tip. I've been playing with no interpolation, but it never occured to try nearest neighbor. Thanks.
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  #33  
Old 09-08-2002, 12:49 PM
michaeld michaeld is offline
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Those pixels

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
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  #34  
Old 09-08-2002, 12:49 PM
michaeld michaeld is offline
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Smiley

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

++m
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  #35  
Old 09-09-2002, 09:46 AM
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DannyRaphael DannyRaphael is offline
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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~
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  #36  
Old 09-09-2002, 10:36 AM
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winwintoo winwintoo is offline
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Quote:
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
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  #37  
Old 01-06-2005, 12:22 AM
candyflip candyflip is offline
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Thumbs down

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

Last edited by candyflip; 01-06-2005 at 01:47 AM. Reason: new info..
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  #38  
Old 01-06-2005, 06:38 PM
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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.
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  #39  
Old 01-14-2005, 01:55 AM
candyflip candyflip is offline
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new info

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
Attached Images
File Type: jpg imagePixelateHalfToneColorC.jpg (99.2 KB, 24 views)
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  #40  
Old 01-14-2005, 09:52 AM
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Axleuk Axleuk is offline
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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 !!!
Attached Images
File Type: jpg pixelate.jpg (99.2 KB, 23 views)
File Type: jpg pixelate2.jpg (97.6 KB, 31 views)

Last edited by Axleuk; 01-14-2005 at 10:14 AM.
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