Results 1 to 20 of 20

Thread: remove background

  1. #1
    Senior Member
    Join Date
    Apr 2004
    Location
    Beeshan
    Posts
    1,830

    Default remove background

    hi ppl,
    any ideas how to remove the back ground from a pic?
    meaning i foto someone,but wanna place him in a plain coloured background,ie.wanna remove whatever background that was in the original pic,essentially only want the guy.
    how to extract accurately esp if the subject is a girl with fly away hair and stuff?
    extract filters?lasso?

  2. #2

    Default

    user eraser.....zoom in and start erasing...then stitch it above the coloured backgrd??

  3. #3

    Default

    i usually use extract filter. but quick mask can help too.

  4. #4

    Default

    I normally use the lasso tool to select the subject. How do you use quick mask?

  5. #5
    Member
    Join Date
    Jun 2004
    Location
    Jurong West
    Posts
    17

    Default

    Use PHOTOSHOP 6, 7 or CS

    1. Remove background
    Open up ur image. In the Layers palette, double-click on the background & click OK to convert it into a Layer. Now select the Lasso tool and draw a loose selection around ur subject. Go to Select->Inverse and hit Delete to remove the majority of the original background. Remove the marching ants by going to Select-> Deselect.

    2. Tidy up edges
    Now zoom in tight on ur subject & use the Eraser tool to tidy up the edges and remove the remainder the background - vary the brush size in tight area & reduce the Opacity around the hair.

    3. Add background
    Use the Zoom tool to zoom out & pull out the bottom corners of the image to free up some working space around your image. Now open up a coloured background & drag it into ur image using the Move tool. To resize it, hit Ctrl+T to bring up the Transform box then click & drag the corners handles to the corners of the image. Hit Enter to apply.

    4. Adjust levels
    In the Layers palette, click & drag Layer 1 underneath the portrait, which is Layer 0 . Some adjustments to the background r needed to make it sit better with the figure. Hit Ctrl+L to bring up Levels & drag the grey Input Levels slider - found underneath the histogram - to darken or lighten the image.


    Though it is very wordy, but hope that this can help you.
    Last edited by onlock; 19th June 2004 at 05:05 PM.

  6. #6
    Member
    Join Date
    Apr 2003
    Location
    Everywhere where e sun shines
    Posts
    1,057

    Default

    In photoshop 7...there's the background eraser function...used it once...was pretty impressed...donno if someone with better experience in this can further elaborate?

  7. #7

    Default

    As for me.. I would use the "Path" tool.

  8. #8
    Member
    Join Date
    Oct 2003
    Location
    Singapore, East
    Posts
    371

    Default

    Quote Originally Posted by EchoGear
    As for me.. I would use the "Path" tool.

    can elaborate more?

    dun quite understand how to use Path tool....

    thanks

  9. #9
    Deregistered satan_18349's Avatar
    Join Date
    May 2004
    Location
    hell 極樂世&
    Posts
    1,498

    Default

    zoom in and used the pen tool...the BEST tool in photoshop...

  10. #10
    Member
    Join Date
    May 2004
    Location
    Woodland
    Posts
    28

    Default

    Hi,

    I knoe there's alot way to extract out the background..
    but is there any short cut way ?

  11. #11

    Default

    The fastest way that I know of is to use the Quick Mask mode and then use the EXTRACT command.

    However, as you can see in all the above responses, there is no fix and fast rule, it all depends on the contrast between the background and your subject. There are so many different tools available to make the extraction easier depending on the contrast. So if the contrast is high, you can either use Magic wand or magnetic lasso. On the other hand, if low and complicated, you may want to use the Path method.

  12. #12
    Member
    Join Date
    Apr 2004
    Location
    In my own world
    Posts
    1,314

    Default

    Hey I'm keen to know too! In the case that u all mentioned how much time do u all need to complete the procedure? I'm interested to know which is the most efficient and correct way to do it. Thanks.

    I already know how to do soft focus...anyone can teach how to do motion blur? Is it the same way as extracting the object and merge it back to the blurred background?

  13. #13
    Senior Member Ansel's Avatar
    Join Date
    Apr 2003
    Location
    Land Downunder
    Posts
    2,207

    Default

    I have heard there is an easy way you can remove the background if it is of a certain dark blue colour. The technique is similar to the "blue screen" effect used for special effects in movie making. I understand you just remove that particular colour from the image, but I just dont know how to doe it. Can a PS expert here in CS enlighten us on how this is done? Thanks in advance.

  14. #14

    Default

    Anyone with experience in using Corel's KnockOut program? How does it compare to the extract feature in PS?

  15. #15

    Default

    It is designed to 'knock out' objects with complex edge details like hair or fur. Works great but not perfect though. Still easier than using Photoshop's masking or erasure tools.

  16. #16

    Default

    For simple jobs, I just brush transparency on channel mask... for more complex jobs I use individual colour channels to convert to alpha masks and apply to transparency after levelling... note that 2 stages of levelling has to be done... 1 for the hair and 1 for the rest of the body..

    Sounds complex?? I know... hard for me to explain.. can only demo..
    Will be conducting a photoshop demo on this soon.

  17. #17

    Default

    Quote Originally Posted by willyfoo
    For simple jobs, I just brush transparency on channel mask... for more complex jobs I use individual colour channels to convert to alpha masks and apply to transparency after levelling... note that 2 stages of levelling has to be done... 1 for the hair and 1 for the rest of the body..

    Sounds complex?? I know... hard for me to explain.. can only demo..
    Will be conducting a photoshop demo on this soon.
    I really recommend Willyfoo's method cos most pros will do this alpha channel thingy. in fact, it's not that complex to do...but technically it sounds hard.

  18. #18

    Default

    Arranging for some demo/workshop in this thread.

    http://clubsnap.org/forums/showthread.php?t=85076

  19. #19

    Default

    I always do the hard way, copy out the background and put as new layer. Then use the Layer mask with Paint brush using a tablet (pen shape pointing device).

  20. #20

    Default

    Quote Originally Posted by khairi
    I really recommend Willyfoo's method cos most pros will do this alpha channel thingy. in fact, it's not that complex to do...but technically it sounds hard.
    Using the alpha channel is just the beginning... how to get the transparency information is the other thing... you can either paint manually opacity/transparency... use selection tools like (lasso, wand, colour range) or combination of all or advanced methods like using colour channel information for manipulation

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •