Apply a perspective transformation to a raster image inside Inkscape (no need to use an external software such as GIMP or Krita).

Related tags

Deep Learningsvginkscapeinkscape-extensionperspective-transformation
Overview

Raster Perspective

Apply a perspective transformation to bitmap image using the selected path as envelope, without the need to use an external software to transform the image.

Installation:

On Linux:

cd $HOME/.config/inkscape/extensions
git clone https://github.com/s1291/InkRasterPerspective.git
  • Open Inkscape (if it is already open, close then re-open it) and you should find the extension under: Extensions > Raster Perspective > Perspective

On Windows:

  • Download the most recent version (direct link: zip)
  • Extract it and copy the files imagePerspective.py and imagePerspective.inx to C:\Program Files\Inkscape\share\inkscape\extensions

How to use

(This extension was tested with both Inkscape 1.1.1 and 1.2-dev on GNU/Linux Ubuntu 20.04.3)

  1. Select the raster image and the quadrangle path (envelope) . Make sure the envelope nodes are ordered as follows:

order of enveloppe nodes

For more details on how to find the nodes order for a path, check out this post.

  1. Extensions > Raster Perspective > Perspective

See below:

How to use the extension

Author

Samir OUCHENE, 2021-2022

All code is licensed under the GNU General Public License version 3. See the license file for details.

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Comments
  • Inkscape 1.2.1: PIL.UnidentifiedImageError: cannot identify image file if image is linked instead of embedded.

    Inkscape 1.2.1: PIL.UnidentifiedImageError: cannot identify image file if image is linked instead of embedded.

    Since I used a quite old version in issue #3, I thought I'd better upgrade to the latest version of Inkscape. Now I get this error:

    Traceback (most recent call last): File "C:\Program Files\Inkscape\share\inkscape\extensions\imagePerspective.py", line 179, in imagePerspective.run() File "C:\Program Files\Inkscape\share\inkscape\extensions\inkex\base.py", line 231, in run self.save_raw(self.effect()) File "C:\Program Files\Inkscape\share\inkscape\extensions\imagePerspective.py", line 123, in effect orig_image = PIL_Image.open(io.BytesIO(img_data)) File "C:\Program Files\Inkscape\lib\python3.10\site-packages\PIL\Image.py", line 3147, in open raise UnidentifiedImageError( PIL.UnidentifiedImageError: cannot identify image file <_io.BytesIO object at 0x000001ca3022c900>

    My image is a 1314x2592 pixel 24 bit PNG file with a size of 6.99 MB, if that matters. Same error for a 3072x2048 pixel 8 bit BMP file with a size of 6 MB.

    The problem disappears if the file is embedded instead of linked. image

    opened by WelliSolutions 10
  • Inkscape 1.0.2-2: Your selection must contain an image and a path with at least 4 points.

    Inkscape 1.0.2-2: Your selection must contain an image and a path with at least 4 points.

    I tried the extension with Inkscape 1.0.2-2 on Windows 10 and I got the error message:

    Your selection must contain an image and a path with at least 4 points.

    I'm 100% sure I do the steps correctly. Here's how my selection looks like when I invoke the command.

    image

    I don't know how to debug the extension in Inkscape, but I have debugging skills in general. Maybe I just need a pointer on how to enable extension debugging.

    opened by WelliSolutions 2
  • Image distorted when resized in a non-uniform way (aspect ratio changed)

    Image distorted when resized in a non-uniform way (aspect ratio changed)

    First of all thanks for this awesome extension. This is exactly what I need.

    The following does not happen for all images. I have not yet identified criteria when it happens or when it doesn't.

    Using commit https://github.com/s1291/InkRasterPerspective/commit/897d8eb4532eac2032d4dc17f8c30fe4c3b053fe which fixes #4 so I can use linked images.

    I start with a linked image like this 1280x960 pixel 24 bit 3.5 MB BMP file:

    image

    and I get this result

    image

    Note the lower right corner which doesn't match the path.

    opened by WelliSolutions 2
  • Not working on windows - issues with deconstructing self.svg.selection and uuto unit

    Not working on windows - issues with deconstructing self.svg.selection and uuto unit

    Using this package on windows had to fix this error.

    issue:

    will not deconstruct the_image_node, envelope_node = self.svg.selection error of missing expected atribute units when calling unit_to_vp

    Created fix and will submit.

    Thanks for the excellent package.

    needs info 
    opened by cia05rf 5
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s.ouchene
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