Legacy ImageMagick Discussions Archive

Hi,

anthony wrote:photographs can not capture transparency. It only captures color, or lack of colors (black), nothing more.

Then how to get the image with the transparency especially for the fabric ?
For an image that is taken how to get the alpha value.




Thanks and Regards,
Madhu.

Hi, Thanks for the reply. Is there any way to attain the alpha channel for a fabric with the background? I mean what are the necessary pre-requisites ? Does the distance between the transparent cloth and the background also effects the alpha value. I am asking this question because I have many image...

Hi, I am working on the transparency of the fabric. I have netted fabric on the blue background. The link of image is http://imageshack.us/photo/my-images/27/bluenet.png/ But when I did " identify -verbose bluenet.png" ,it is showing Alpha value mean as "1". I also want to know w...

Hi,

I am working with the semi-transparent images and in png format.
I know that in imagemagick we can convert an image from jpg to png.
But can I get camera which supports the png format instead of converting the file in imagemagick.




Thanks,
Madhu.

convert match_navy.gif -fx 'g-2*b+1' match_one_remove_alpha.png It is not great, but did work to some extent! Now applying it to remove the background color (as per two background color removal) convert match_navy.gif match_one_remove_alpha.png -alpha Off \ -fx "v==0 ? 0 : u/v - u.p{0,0}/v + u...

Hi! Thanks for the reply... It is working fine with the example what you have shown. But it is not working with the other example. I am posting the link for the other example http://imageshack.us/photo/my-images/811/62025428.png/ Is it possible to remove the background which is in green color and to...

Hi, Is it possible to remove the background for this image. http://imageshack.us/photo/my-images/35/matchnavy.gif/ The output should be http://imageshack.us/photo/my-images/405/matchrecovered.gif/ This output must be obtained from only single background removal. Madhu.

Hi,

I have a doubt that is it possible to retain the fabric transparency only one background?
If possible please reply me ....

Thanks,
Madhu.

Thanks for the reply....

Is there any alternative for this?

Thanks,
Madhu.

If the scale of the two images are different, i.e. the distance to the objects from the camera, then you would have to register (warp) the images so that there was a perfect 1:1 match of the two image geometries before you can do background subtraction. Such a perfect registration may be impossible...

Hi, Thanks for the reply. But I have one more doubt.I took the same pic in two different complement backgrounds but from some distance variation. That is the distance from the camera and object is differing. So, can I do the background subtraction of those two images. I am not sure,so can U make it ...

Hi,


I am trying to remove the background of an semi-transparent object.
I am attaching the link.http://imageshack.us/photo/my-images/135/73869723.png/
I want to remove the green background and make the object look clear.



Thanks,
Madhu.

Hi,

I am posting the link of the fabric.

http://imageshack.us/photo/my-images/695/pinknet.png/
http://imageshack.us/photo/my-images/27/bluenet.png/

The resultant image should be only the fabric without any background.


Thanks,
Madhu.

Hi,

That brackets issue is resolved fmw42.
The link which You sent me helped in resolving the problem.

But I have the problem which I have posted to anthony.
The background subtraction for the transparent fabric object.

Madhu

Hi, This is my command " convert alp1.png black.png ( -clone 0 -clone 1 -compose difference -composite -threshold 0 ) -delete 1 -compose copy_opacity -compose tmp.png" The error is " bash: syntax error near unexpected token '(' " Suggest me if I need to make any changes..... madhu