Crayon - clker.com tracing tool
SummaryCrayon is a tracing tool intended for creating clip arts out of photographic images. To start the process, draw scribbles identifying the background region. Click on + to add a new object and draw a scribble inside only one object. Repeat for every object. Once all objects are marked click on the segment button and watch.
1. How do I reach Crayon on the website?
2. What are the functions of every toolbar button?
3. Did you limit the size of the image because your tool is free ?
We did not place any artificial limits on the size of the image that you can process. The size of the image is limited by what the flash virtual machine can process, and I believe it is 4095x4095 in flash 10. Larger images will produce lots of noise along the lines and will take longer time to process.
4. What is the best practice recommended image size ?
We got best results when the main object to be traced is less than 1 mega pixel. The example at the top is 256x256, 0.06 Mega Pixel. The size of the object you are tracing is usually smaller than the size of the image. For example one might have a 4 mega pixel image (2000x2000) however, if the picture of a mouse inside the photo is like 400x400, I expect that you will get good results.
5. Which will get better results: colored, greyscale or lineart images ?
Colored images have more information than greyscale, so they are better. Pictures with plain colors produce better results than textured images.
Trace lineart images only if they have low details. If the lineart image is full of thin lines and cross-hatched lines, it will take very long time to process. At that point I recommend using potrace instead of crayon.
6. What if the image resolution is high, what should I do ?
Draw a background scribble around your object, then click on crop excess background. If the resolution is still high, click on the downsample button
7. How do I color the result picture ?
After you're done with segmentation and vectorization, select one object at a time from the drop down list box. Check use fill color, then click on the rectangle under it. Keep the dialog open and click on the list box and select another object. Click on use fill color again, then move the color chooser. Make sure to click Ok at the end.
8. Why is this tool very slow ... it's getting on my nerves ?
Well.... it runs on a virtual machine..... so let's hope Google finishes their native client project.
9. Do I have to scribble over every object in the image ?
No. Scribble background around the main object you want, and scribble with new objects inside the parts that make up the object you want to trace. In the example at the top we totally ignored the carpet she's jumping on.
10. How long did it take you to complete the example at the top ?
Approx. 4-5 minutes including coloring. I have been using crayon for while now.