Every time you want to make changes to the image, you need to change the mode again. The disadvantage is that this a very directional approach. Your can use different dithering methods to get desired look. One of the easiest is to change the mode of the image to Indexed Colors and using a custom lego color palette: You could use a dedicated software, such as Triadem Coloration but it is rather pricy. There are several methods you can use to reduce the number of colors in your photograph to the colors available in LEGO. Please notice the important difference between screen resolution, which is a dimension of density (measured in PPD or DPI) and the number of pixels on your screen (such as 1028×768 pixels). Both images will have different sizes on your monitor, since your are likely to have another screen resolution. To get a better impression of how the mosaic may look in the end I magnified the image until one pixel is approximately 8mm and I took a screenshot of it (see below). My monitor has a resolution of around 108 PPI and hence the photograph becomes very small at 100% magnification: The next step is to use the crop tool so bring the image to the desired size. I prefer to stay with Photoshop just a little bit longer to work out some of the details of the photograph. Here is what it would look like directly: The cropping, sizing and selection of colors can be done by them semi-automatically. Your could now already use a dedicated LEGO Mosaic software to such a Photobricks or PicToBrick to create your mosaic. I used Photoshop to remove the background around his head. But before we crop the image, it is a good idea to get rid of any unnecessary elements in the background. One pixel in the image will correspond to one brick and hence we need to crop the image to 96×144 pixels. The image is 620 x 412 pixels and hence far too big for a mosaic. The source image is a grey scale image, but creating colorful mosaics follows the same process as a grey scale mosaic. Photographs often use the proportion of 2:3 and hence a 2×3 base plate design would result in 96×144 bricks or 76.4 x 114.6 cm.įor my mosaic I selected a portrait of Robert M. Maybe it would be wiser to refer to this as 3.175 bricks per inch (BPI) or 1.25 bricks per cm. This results in a resolution of 3.175 dots per inch (DPI) or 1.25 dots per centimeter. The smallest unit of a LEGO mosaic is a single 1×1 plate that measures 8×8 mm (actually 7.8mm plus 0.1mm of play between bricks). You will be heavily limited on the resolution of the mosaic. First, you should have as little detail in the photograph as necessary. Selecting your source image does seem like an easy task, but you need to be aware of some of the constraints to make a good choice. Selection of a source image and basic dimensions of the mosaic I hope that the lessons I learned may also help you creating your own mosaics. I started out with absolutely no LEGO mosaic experience and I wrote this tutorial along my way towards my first mosaic. Creating mosaics made of LEGO is a popular activity and you may enjoy looking at some examples at Mosaic Blocks or at the Flickr LEGO Mosaic Group.
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