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mamiwmamong
 Post subject: How to remove background from image ? (select --> By Color not work)
PostPosted: Mon Dec 03, 2018 1:45 am  (#1) 
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Joined: Dec 02, 2018
Posts: 4
GIMP Version: 2.8.14
Operating System: Windows
GIMP Experience: New User


From this topic http://gimpchat.com/viewtopic.php?f=8&t=17053

Tas_mania advice me like this ===>
Quote:
To remove background color right-click the layer in the layers box and 'add alpha channel'. Then 'Select' > 'By Color'. Next left-click the color you want to remove and 'Edit' > 'Clear'. Then 'Select' > 'None'.


It's work good with some image.

But how to remove background on complex image. please see attachments.

I want to store only a dog. How can i do ?


Attachments:
350533.jpg
350533.jpg [ 225.66 KiB | Viewed 4362 times ]
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Wallace
 Post subject: Re: How to remove background from image ? (select --> By Color not wor
PostPosted: Mon Dec 03, 2018 2:00 am  (#2) 
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Administrator
User avatar

Joined: Aug 10, 2012
Posts: 13080
Location: Native to NYC living in Arizona, Gimp 2.8 & 2.10, Win 11 PC.
mamiwmamong wrote:
GIMP Version: 2.8.14
Operating System: Windows
GIMP Experience: New User


From this topic http://gimpchat.com/viewtopic.php?f=8&t=17053

Tas_mania advice me like this ===>
Quote:
To remove background color right-click the layer in the layers box and 'add alpha channel'. Then 'Select' > 'By Color'. Next left-click the color you want to remove and 'Edit' > 'Clear'. Then 'Select' > 'None'.


It's work good with some image.

But how to remove background on complex image. please see attachments.

I want to store only a dog. How can i do ?

Using a layer mask,
would be a good way to do this kind of image.

I did this very quickly using a layer mask.
It's not perfect,
but it can be done much better.
If more time was given to it.
Attachment:
350533_wallace.png
350533_wallace.png [ 134.03 KiB | Viewed 4353 times ]

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"A wise man learns more from a foolish question than a fool can learn from a wise answer"
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mamiwmamong
 Post subject: Re: How to remove background from image ? (select --> By Color not wor
PostPosted: Mon Dec 03, 2018 2:22 am  (#3) 
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New Member

Joined: Dec 02, 2018
Posts: 4
Wallace wrote:
mamiwmamong wrote:
GIMP Version: 2.8.14
Operating System: Windows
GIMP Experience: New User


From this topic http://gimpchat.com/viewtopic.php?f=8&t=17053

Tas_mania advice me like this ===>
Quote:
To remove background color right-click the layer in the layers box and 'add alpha channel'. Then 'Select' > 'By Color'. Next left-click the color you want to remove and 'Edit' > 'Clear'. Then 'Select' > 'None'.


It's work good with some image.

But how to remove background on complex image. please see attachments.

I want to store only a dog. How can i do ?

Using a layer mask,
would be a good way to do this kind of image.

I did this very quickly using a layer mask.
It's not perfect,
but it can be done much better.
If more time was given to it.
Attachment:
350533_wallace.png



Could you please give me some about how to do that step by step sir ? and may be give me some finished image by not resize sir ?
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Wallace
 Post subject: Re: How to remove background from image ? (select --> By Color not wor
PostPosted: Mon Dec 03, 2018 2:51 am  (#4) 
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Administrator
User avatar

Joined: Aug 10, 2012
Posts: 13080
Location: Native to NYC living in Arizona, Gimp 2.8 & 2.10, Win 11 PC.
mamiwmamong wrote:


Could you please give me some about how to do that step by step sir ? and may be give me some finished image by not resize sir ?

It's simple to do.
Add a layer mask to the image.
Layer>Mask>Add Layer Mask.
The default setting for a layer Mask,
is White Full Opacity.
Image

The layer mask is painted on.
Black will remove pixels and white will restore them back.
Paint onto the layer mask with Black,
to remove what you don't want.
If you make a mistake,
you can use white to paint over the mistake and restore the pixels,
repairing the mistake.
Image

Attachment:
350533_wallace_2.xcf [5.92 MiB]
Downloaded 198 times

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"A wise man learns more from a foolish question than a fool can learn from a wise answer"
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mamiwmamong
 Post subject: Re: How to remove background from image ? (select --> By Color not wor
PostPosted: Mon Dec 03, 2018 3:09 am  (#5) 
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New Member

Joined: Dec 02, 2018
Posts: 4
Wallace wrote:
mamiwmamong wrote:


Could you please give me some about how to do that step by step sir ? and may be give me some finished image by not resize sir ?

It's simple to do.
Add a layer mask to the image.
Layer>Mask>Add Layer Mask.
The default setting for a layer Mask,
is White is Full Opacity.
[ Image ]

The layer mask is painted on.
Black will remove pixels and white will restore them back.
Paint onto the layer mask with Black,
to remove what you don't want.
If you make a mistake,
you can use white to paint over the mistake and restore the pixels,
repairing the mistake.
[ Image ]

Attachment:
350533_wallace_2.xcf



Could you please give me some video please ? i can not do that.
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Tas_mania
 Post subject: Re: How to remove background from image ? (select --> By Color not wor
PostPosted: Mon Dec 03, 2018 3:24 am  (#6) 
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GimpChat Member
User avatar

Joined: Nov 04, 2015
Posts: 1366
Quote:
Could you please give me some video please ? i can not do that.

https://www.youtube.com/results?search_query=gimp+add+layer+mask
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rich2005
 Post subject: Re: How to remove background from image ? (select --> By Color not wor
PostPosted: Mon Dec 03, 2018 5:00 am  (#7) 
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GimpChat Member

Joined: Mar 04, 2011
Posts: 2446
Gmic interactive foreground extract. (in the contours menu)

An image like that only takes a minute to dot around the boundary, hitting space bar towards the end to check the extraction

Attachment:
01-extract.jpg
01-extract.jpg [ 194.31 KiB | Viewed 4314 times ]


Any missing bits can be touched-up with the clone tool or use it to make a layer mask. Often quicker than painting in a mask.

Attachment:
02-extract.jpg
02-extract.jpg [ 144.54 KiB | Viewed 4314 times ]


Video demo: https://youtu.be/Yu46Gs1NI34

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