Step 2: Basics of Lego Structures - Mosaics
If you want an easier way to construct the Lego mosaic try this:
1. Measure the number of pegs on your model that you want your image to take up (length x width)
2. Print the picture of the image you want and cut out a piece of tracing paper that have the same scale as the brick picture you measured in step 1
3. Make a grid on the tracing paper using x and y lines that match up with the number of bricks you counted from step 1 (i.e. 23 rows and 46 columns if you had a space of 23 x 46 in step 1)
4. With the image under the tracing paper, use colored pencils to trace an outline of the shape of each of the colors in the original picture
5. Brickify this by making each square on the graph one color to symbolize one lego brick. Try sticking to the color that takes up the majority of the square. For example, if a square was 1/3 red and 2/3 black, it may be better to make the square black. There will be some image distortion but try playing around with it until it comes out alright.
This could also be done with gimp or photoshop by automatically doing a grid overlay on the picture too http://www.wikihow.com/Transfer-Images-Using-a-Grid-and-a-Computer
The biggest rule of thumb for this section is that the larger the lego space, the more image resolution you'll get. Try thinking of each brick as a pixel in a picture. The more space you have, the more pixels, and the more detailed the image becomes.