Difference between revisions of "Inkscape/C4/Trace-bitmaps-in-Inkscape/English"
From Script | Spoken-Tutorial
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'''Title of script: Trace bitmap in Inkscape''' | '''Title of script: Trace bitmap in Inkscape''' | ||
| − | '''Author:''' Arthi. A | + | '''Author:''' Arthi. A & Saurabh |
'''Keywords:''' Difference between raster and vector image, various raster and vector formats, convert raster image to vector | '''Keywords:''' Difference between raster and vector image, various raster and vector formats, convert raster image to vector | ||
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding-top:0in;padding-bottom:0.0382in;padding-left:0.0382in;padding-right:0in;"| Point to '''Update''' button | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding-top:0in;padding-bottom:0.0382in;padding-left:0.0382in;padding-right:0in;"| Point to '''Update''' button | ||
| − | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding-top:0in;padding-bottom:0.0382in;padding-left:0.0382in;padding-right:0.0382in;"| Make sure to click on the '''Update''' button after selecting each option | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding-top:0in;padding-bottom:0.0382in;padding-left:0.0382in;padding-right:0.0382in;"| Make sure to click on the '''Update''' button after selecting each option |
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding-top:0in;padding-bottom:0.0382in;padding-left:0.0382in;padding-right:0.0382in;"| Let us add some hair style. | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding-top:0in;padding-bottom:0.0382in;padding-left:0.0382in;padding-right:0.0382in;"| Let us add some hair style. | ||
| − | Add | + | Add nodes on the head area. Now move the nodes little up as demonstrated. |
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Revision as of 17:06, 29 February 2016
Title of script: Trace bitmap in Inkscape
Author: Arthi. A & Saurabh
Keywords: Difference between raster and vector image, various raster and vector formats, convert raster image to vector
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| Opening Slide | Welcome to the Spoken Tutorial on “Trace bitmap in Inkscape” using Inkscape. |
| Learning Objectives (Slide) | In this tutorial
We will learn to
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| System requirement (Slide) | To record this tutorial, I am using
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| Show the images | Here are 2 images on my desktop.
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| Open the images | The first is the raster image and the second image is vector.
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| Zoom into both the images | Both the images may look similar.
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| Point to the first image | Now the first image looks pixelated because a raster image is made of up pixels.
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| Point to the second image | But the second image does not pixelate because a vector image is made up of paths.
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| Raster image formats (Slide) | Some of the raster image formats are
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| Vector image formats (Slide) | Some of the vector image formats are
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| Compound formats | The formats which can be both vector and raster are
<<PAUSE>>
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| Point to both the images | Let us now learn how to convert this raster image to vector.
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| Slide | This image is given to you in the code files link.
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| Open Inkscape | Open Inkscape. Let us Import the raster image now.
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| Go to File >> Import | Go to File. Click on Import.
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| Path menu >> Trace Bitmap | Now, go to Path menu. Click on Trace Bitmap.
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| Point to the dialog box | A dialog box opens up. Under the Mode tab we can see various options.
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| Point to the image | Make sure the image is selected. |
| Point to the Brightness cutoff option | By default Brightness cutoff option is selected.
Under Preview, click on Update button to observe the changes. |
| Point to Preview window | As you can see in the Preview window, Brightness steps finds the difference in brightness.
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| Point to Update button | Make sure to click on the Update button after selecting each option |
| Click on Edge detection | Now click on the second option, that is Edge detection.
As the name indicates it finds only the edges. |
| Click on Color quantization | Color quantization traces along the boundaries of reduced colors. |
| Click on Invert image | Invert image will invert the colors of the bitmap if you think the is better inverted. |
| Click on Multiple scans | Multiple scans is good for multiple colors. |
| Click on Brightness cutoff | Once again Brightness steps finds the difference in brightness. |
| Click on Colors | Colors finds an amount of colors specified.
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| Click on Grays | Grays is like colors, but finds only grayscale colors. |
| Point to Smooth option | Smooth applies Gaussian blur to the bitmap before tracing.
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| Point to Stack scans | Stack scans will stack scans on top of another instead of tiling.
This eliminates gaps. |
| Point to Remove Background | Remove Background will take the background away. Let me click on it.
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| Point to the dialog box | Now we have seen all the tracing options.
You can choose from any of these according to your requirement. |
| Click on colors option | Let me choose colors options. Click on it. |
| Click on OK >> Close the dialog box | Now click on OK and close the dialog box. |
| Point to the traced image | The traced image in created on the top of the original image. |
| Click and move the image | Click and move the image to see both of the images. |
| Zoom in to the images | The image is now converted into raster.
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| Point to both the images | As told earlier the first image gets pixelated, while the second one does not gets pixelated and you can see the paths clearly.
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| Delete the original image | Delete the original image. |
| Point to the image >>
Click on Nodes tool |
Now we can edit the vector image.
To do do, click on the Nodes tool. |
| Add 2 nodes on the head area | Let us add some hair style.
Add nodes on the head area. Now move the nodes little up as demonstrated. |
| Point to the image | Next let us change the colors of the image. |
| Change the colors | Let me change the black color to blue.
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| Point to the image | Let me now save the image in both raster and vector formats.
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| Save the image as PDF | First save it as vector. So in a PDF format.
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| PDF >> Image-vector | Change the extension to PDF. Name it as Image-vector. |
| Point to the image | Next let us save the image as rater, that is in a PNG format. |
| File >> Save As | Once again go to File. Click on Save As. |
| Save the image as PNG | Now change the extension to PNG. Click on Save.
Change the name as Linux-raster. |
| Open both the images | Now let us go to the desktop and check both the images. |
| Point to both the images | Now you can clearly identify the difference between the two images. |
| Summarize | That's all for this tutorial. Let us summarize.
In this tutorial, we have learnt to
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| Assignment | As an assignment, select a vector image and convert to a raster of grey color. |
| About Slide | The video available at the following link summarizes the Spoken Tutorial project. Please watch it. |
| About Slide | The Spoken Tutorial Project Team conducts workshops and gives certificates for those who pass an online test.
For more details, please write to us. |
| About Slide | Spoken Tutorial Project is supported by the NMEICT, MHRD, Government of India.
More information on this Mission is available at this link. |
| Acknowledgment | We have come to the end of this tutorial.
This is Arthi and Saurabh from IIT Bombay, signing off. Thanks for joining. |
