|
Photoshop Tips & Tricks answers reader's questions about
using Photoshop's Extract Filter to isolate an image
In the Design & Publishing Center, and the Photoshop Tips & Tricks Department
Changing Color For The Better (continued)
Using the Extract Filter in Photoshop
-
Extract came along with Photoshop 5.5, and then in version 7 they moved it to the Filters menu. It works the same, which is quite easy, and straight forward. Think of it as an artificial intelligence masking and selection tool.
We use the Extract command to make some difficult selections that require a sophisticated way to isolate a foreground object from its background. It's actually best suited for objects with wispy, intricate, or undefinable edges that need to be clipped from their backgrounds with a minimum of manual work.
This one was a cakewalk, but first we need to duplicate the image to a new layer.
- Drag layer and drop it on the New Layer button at the bottom of the layers palette.
Extract will delete the unwanted portions of the image.
Ordinarily, when making a montage, you would Extract the subject from its background in one file, then (Move Tool "V") drag it into the destination Montage file, creating its own, new, layer. Here, we're extracting from the SAME file, so we have to work on a duplicate. (This is the way Dave will handle his montage project.)
The Extract working window appears with the edge highlighter tool selected in the upper
left area of the dialog box. Notice too, in version 7 you get a little "hint" window which prompts you for the next step. Sweet.
The Extract process is straight forward:
- first highlight the edges of the subject to be modified or removed
- then you define the object's interior with a special magic color
- and preview.
It's as simple as that. You can refine and touch up the selection to your liking, but most of the time the tool is accurate.
- Outlining the Subject to be Extracted
-
Get started by setting the brush size for the edge highlighter tool to about 6 in the Brush Size box. The fatter the brush, the more touch-up you'll have to do, although the fatter brushes make for easy (and sloppy) selections. Start with a large brush to outline a general selection, and then switch to a finer brush for the touch-up work. The green part is colored Green. Note in some areas of the green you see a hairline thin yellow line. That's the selection zone.
(Open first "Extract" diagram)
-
Draw the outline highlight making it slightly overlap both the foreground and background areas around the edge you want to cut -- in fact that's the way the Extract command makes its selection! It looks for the difference in contrast between pixels in the selected zone.
- Designate the "Lift" with the Fill Bucket
-
Once the outline is drawn, simply click the "Fill Bucket" and then click inside the object to fill within your selection. The default Fill color is bright blue, and the highlight color is green, but you can change those.
(This is demonstrated in the "FILL" diagram)
- Set Preview to begin Touch-up
-
In a perfect world, your extraction will be perfect. But just in case it isn't, you'll need some touch-up
(Now open the "PREVIEW" diagram)
-
Click the Preview button and, presto, highlighted, extracted subject. At the bottom right of the work window you can select various preview options. Here we just see the checker-board background.
(Now open the "Touchup" diagram)
To refine your selection, or make corrections, use the other tools to paint-in or paint-out image as need be. I made the background "white" so I could see where the inaccurate selections were. Now I just used the eraser tool to get rid of the faults.
Once you've got it just right click OK to apply the extraction.
- Finishing Up
-
Notice that all the background has now been trimmed away from the subject. Since I actually want to slightly blure the background of the image we need to activate our selection...
- Command/Click (control/click) the layer name (Makes selection active)
- Now click in the original image layer,
- Choose: Select Menu > Inverse,
- Hit Cmd/H (Ctrl/H) to hide the ants, then...
- Filter > Blur > Gaussian Blur and adjust to taste.
Watch as the background softens, simulating a narrow depth of field photo.
Now the subject pops forward, and becomes the prominent, more important, focal point of in the photo. (Return to the "Before and After" image, and note the right-hand image)
You can play lots of other tricks now that you have both the subject and the background selectable. But at this point we decided to flatten, save and run with it. (The best photo retouch results are the ones you don't notice!)
- The Solution that Satisfies
-
The whole process took less time than it took you to read this page, and the client was pleased.
-
"Looks pretty good" he said upon seeing the web page.
We just smiled and said, "You took the picture, we just put it up there."
- So, there you have it! Simple and direct.
- Back to the previous page
|
Topics This Month
Win Prizes
Link to Photoshop Tips & Tricks and you can win prizes. Click and let us tell you all about it!
|
Sharon Steuer's Famous "Zen of the Pen" Seminar
... Master the "Zen" of using the pen tool in Photoshop, Illustrator, Quark XPress, and other software programs with this Certified Training session in downloadable PDF format! http://www.design-u.org/~zen/index.html
|
- Post your questions and tips to the Photoshop 911 hot line
- If we don't have the answer, we turn to the Photoshop Bibliography in the Designers' Bookshelf and select books until we find the answers for you. Sometimes answers are the composite of information from several of the books --- always edited and written to give you the fastest possible answer in the shortest possible number of words.
- If you have a Photoshop related web site, or you know of a good Photoshop tutorial based web site, why not list it in the Photoshop 911 Search Engine soon to appear at Photoshop911.com
Get Published
- If you'd like to publish in the pages of DT&G then read the Readers Guidelines or just contact us
- Got a tip? Get a treat!
- Send your tips... if they're published, you'll get a chance to select goodies from the Designers' Bookshelf!
- Thank you for visiting
- . . . the Photoshop Tips & Tricks department of the Design & Publishing Center Don't forget: this is a reader-driven web site. We need your input and participation to continue bringing great content to Photoshop users everywhere at no charge.
High content, low noise since 1990DT&G ezine has been bringing quality design, typography and graphics help to desktop publishers, graphic designers, graphic artists and visual communications practitioners since it's debut on CompuServe and the Mug News Service (MNS) in 1989. The Design & Publishing Center was launched in 1994 and continues to be one of the few remaining web sites to deliver a 90% content to noise ratio -- featuring graphic design, photography, typography, illustration and imformation for designers, graphic artists, creative directors and anyone involved in desktop publishing, design, art, illustration or other visual communications fields.
Copyright 1993 through 2003, ALL RIGHTS RESERVED. Although DT&G's Photoshop Tips & Tricks department was the first "tips & tricks" publication for Photoshop, it is not officially associated with Adobe Systems, Inc. Photoshop is a Registered Trademark for Adobe Systems, Inc., All Rights Reserved.
Contact the design team for web page critique, makeover clinics, or website design, production and hosting. If you would like your web site reviewed by peers in the web publishing industry, just go to the Web Design & Review wing and visit the Web Site Reviews department where you'll find reader's web sites posted for review. There you'll also find our Web Site Review Submission form for submitting your site for review. The Design & Publishing Center is an affiliate of the Graphic Design Network, a wholly owned subsidiary of Showker Inc., trading as Graphic Arts & Design, a Virginia State Corporation since 1972. Affiliates of The Graphic Design Network also include . . . 60-Second Window (tm), the editorial column published online since 1989 with editorials covering computer and online related issues; The Publishers' Warehouse(tm), the freeware, shareware, and tryware department first launched in 1987 publishing a printed catalog of more than 200 disks of clip art, fonts and programs for designers; the News Serve Network(tm), where you can post your own news stories, press releases and information about your products or services -- syndicated across dozens of websites; the User Group Network and the User Group Academy. The Design Center is a proud sponsor of the Association of Apple Computer Users & Groups at www.aacug.org Please come back again! |