We suppose that I put my signature on a piece of white paper with my first and last name on it. After is executed a scan of this signature in .pdf, or .png or .tiff, etc. (a image file).

What are the steps of a specific software to select only the signature, make the background transparent so that I can move it in a word document?

Are there any online programs without registration that can do this?

Thank you all for a possible answer.

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    If you have access to Photoshop and a scan of the signature, this will give you good results and keep anti-aliasing intact: graphicdesign.stackexchange.com/a/29545/18168 – curious Aug 2 '19 at 16:47
  • @Emilie Upvoted everythink into your link. Thank you very much. – Sebastiano Aug 2 '19 at 18:40
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    It's a bit of a complex process but it's been a life-saver of mine for years :) – curious Aug 2 '19 at 18:42

Use GIMP. Open your file. If it's not RGB, change the mode to RGB (=Image > Mode > RGB).

Insert alpha channel, if it does not already exist. Goto Layer > Transparency. Option "Add alpha channel" is grayed, if there's already one.

Increase the contrast with Color > Curves so that paper is full white. Adjust the hue and saturation of the writing good after the paper is white. Do it with Colors > Hue-Saturation. Be sure you do not make the background grey.

You should have a single layer image:

enter image description here

(the text here is random jumble scratched with the mouse, it's not readable writing in any language)

Then set the current foreground drawing color to white and apply Color > Color to alpha. White changes to transparency:

enter image description here

Then export your image as PNG. It may be a good idea at first check it has the right print size and resolution (300dpi). For it goto Image > Print Size.

| improve this answer | |
  • Kind :-) user :) welcome again into my question. Can you, please, be more clear. I have a low low level with Gimp. "change the mode to RGB" (where into the menu?) "and insert alpha channel (where into the menu?)" . My native speaker is Italian language :) can you put the screenshots of the label of the menu, please? Into web not exist nothing? – Sebastiano Aug 2 '19 at 15:40

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