I opened the digital image (maybe you took yours with a digital camera just like me, or you scanned the image, it doesn't matter) in an image manipulating program such as Photoshop or something. I used the GIMP for this work. GIMP is a free program, so you can download it from the site: gimp.org.
First turn the image mode to black and white. It is important because on bw images is easier to find the contours.
Now use the effect "find edges" or manipulate with the treshold in the color menu. The point is to find the edges. I can not give you exact values, because every pictures are different.
Sorry...
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Lili F.
02 Sep 19:26
Cool!I love them:)