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joojaa
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miroxlav
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I'm wondering if there is a way to automatically calculate transparent image from set of non-transparent ones. No manual work with individual pixels or manual setting of opacities.

Many times I need to export images from 'image editors'"image editors" which are not supporting transparent backgrounds (example: PowerPoint). I can still give the image any background. For example I'm able to export two samples with mutually inverse backgrounds (as seen on 2 samples below). Or I can create 3-5 images with backgrounds for example: red, green, blue, white, black.

Example:
2 samples with mutually inverse backgrounds leading to expected result (I'm seeking technique/plugin to get such a result):
enter image description here

With such a set, based on differences between samples it should be completely clear what pixel has what alpha value.

Is there a method/plugin for converting set of samples described above into single image with correctly derived transparency?

I prefer GIMP.

EDIT:
One more sample to illustrate the idea. Semi-transparent glows are used:

enter image description here
enter image description here

I'm wondering if there is a way to automatically calculate transparent image from set of non-transparent ones. No manual work with individual pixels or manual setting of opacities.

Many times I need to export images from 'image editors' which are not supporting transparent backgrounds (example: PowerPoint). I can still give the image any background. For example I'm able to export two samples with mutually inverse backgrounds (as seen on 2 samples below). Or I can create 3-5 images with backgrounds for example: red, green, blue, white, black.

Example:
2 samples with mutually inverse backgrounds leading to expected result (I'm seeking technique/plugin to get such a result):
enter image description here

With such a set, based on differences between samples it should be completely clear what pixel has what alpha value.

Is there a method/plugin for converting set of samples described above into single image with correctly derived transparency?

I prefer GIMP.

EDIT:
One more sample to illustrate the idea. Semi-transparent glows are used:

enter image description here
enter image description here

I'm wondering if there is a way to automatically calculate transparent image from set of non-transparent ones. No manual work with individual pixels or manual setting of opacities.

Many times I need to export images from "image editors" which are not supporting transparent backgrounds (example: PowerPoint). I can still give the image any background. For example I'm able to export two samples with mutually inverse backgrounds (as seen on 2 samples below). Or I can create 3-5 images with backgrounds for example: red, green, blue, white, black.

Example:
2 samples with mutually inverse backgrounds leading to expected result (I'm seeking technique/plugin to get such a result):
enter image description here

With such a set, based on differences between samples it should be completely clear what pixel has what alpha value.

Is there a method/plugin for converting set of samples described above into single image with correctly derived transparency?

I prefer GIMP.

EDIT:
One more sample to illustrate the idea. Semi-transparent glows are used:

enter image description here
enter image description here

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miroxlav
miroxlav
  • 155
  • 11

I'm wondering if there is a way to automatically calculate transparent image from set of non-transparent ones. No manual work with individual pixels or manual setting of opacities.

Many times I need to export images from 'image editors' which are not supporting transparent backgrounds (example: PowerPoint). I can still give the image any background. For example I'm able to export two samples with mutually inverse backgrounds (as seen on 2 samples below). Or I can create 3-5 images with backgrounds for example: red, green, blue, white, black.

Example:
2 samples with mutually inverse backgrounds leading to expected result (I'm seeking technique/plugin to get such a result):
enter image description here

With such a set, based on differences between samples it should be completely clear what pixel has what alpha value.

Is there a method/plugin for converting set of samples described above into single image with correctly derived transparency?

I prefer GIMP.

EDIT:
One more sample to illustrate the idea. Semi-transparent glows are used:

enter image description here
enter image description here

I'm wondering if there is a way to automatically calculate transparent image from set of non-transparent ones. No manual work with individual pixels or manual setting of opacities.

Many times I need to export images from 'image editors' which are not supporting transparent backgrounds (example: PowerPoint). I can still give the image any background. For example I'm able to export two samples with mutually inverse backgrounds (as seen on 2 samples below). Or I can create 3-5 images with backgrounds for example: red, green, blue, white, black.

Example:
2 samples with mutually inverse backgrounds leading to expected result (I'm seeking technique/plugin to get such a result):
enter image description here

With such a set, based on differences between samples it should be completely clear what pixel has what alpha value.

Is there a method/plugin for converting set of samples described above into single image with correctly derived transparency?

I prefer GIMP.

EDIT:
One more sample to illustrate the idea. Semi-transparent glows are used:

enter image description here

I'm wondering if there is a way to automatically calculate transparent image from set of non-transparent ones. No manual work with individual pixels or manual setting of opacities.

Many times I need to export images from 'image editors' which are not supporting transparent backgrounds (example: PowerPoint). I can still give the image any background. For example I'm able to export two samples with mutually inverse backgrounds (as seen on 2 samples below). Or I can create 3-5 images with backgrounds for example: red, green, blue, white, black.

Example:
2 samples with mutually inverse backgrounds leading to expected result (I'm seeking technique/plugin to get such a result):
enter image description here

With such a set, based on differences between samples it should be completely clear what pixel has what alpha value.

Is there a method/plugin for converting set of samples described above into single image with correctly derived transparency?

I prefer GIMP.

EDIT:
One more sample to illustrate the idea. Semi-transparent glows are used:

enter image description here
enter image description here

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miroxlav
miroxlav
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miroxlav
miroxlav
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miroxlav
miroxlav
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miroxlav
miroxlav
  • 155
  • 11