Today I found a very nice site while stumbling called as Textorizer. Textorizer can easily vectorize a picture using text strings.
Textorizer takes a raster image in a format such as png, jpeg or gif, detects edges using a Sobel convolution filter and replaces them with supplied lines of text.
The output from textorizer is in SVG, which can be viewed directly in the Firefox browser or using the Adobe SVG Plugin.
Visit and Enjoy