I have a collection of images and an image that I want to generate from that collection.
What software is there available for Ubuntu for generating a mosaic image? How to do it?
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A very nice program for doing all sorts of photomosaics is in the repositories and is called
software-center or open terminal and run
sudo apt-get install metapixel
The readme is available at the github page or from
/usr/share/doc/metapixel/README.gz when it is installed, and it notes that
Metapixel is a program for generating photomosaics. It can generate classical photomosaics, in which the source image is viewed as a matrix of equally sized rectangles for each of which a matching image is substitued, as well as collage-style photomosaics, in which rectangular parts of the source image at arbitrary positions (i.e. not aligned to a matrix) are substituted by matching images.
Nevertheless, here's an example of how I used
metapixel to create a classic photomosaic.
There is a perl script that comes with
metapixel-prepare, and this is very useful for generating the photo tiles that your mosaic image will contain.
Options can be found with
metapixel-prepare --help, but basically you just have to specify your folder of pictures and your metapixel library folder.
1) This library folder needs to be created before you run the
metapixel-prepare command, so run in terminal
2) Then to generate the tiles from the selected folder, the minimum command would have the form:
metapixel-prepare ~/location/of/my/pictures/ ~/metapixel_library
If you wish
metapixel-prepare to recurse through the folders you have to specify
-r; if you want the tiles to be a specific size (other than the default 128x128), specify at the end of the command, for example,
--width 80 --height 80.
As an example, the command I used was:
metapixel-prepare -r ~/Pictures/canon/metapixel ~/metapixel_library --width 80 --height 80
3) To construct your photomosaic you must specify the location of this library of tiles, specify the image to be metapixelled and designate an output file (which must be a .png file). The input jpg can be any kind of picture and any size (see note on scale below).
I used the following commands in my case:
metapixel --library ~/metapixel_library --metapixel /home/mike/Pictures/canon/2012_02_05/img_0372.jpg output.png
The full options for metapixel can be found by entering
metapixel --help, and sometimes you may need to use
--scale to increase the size of the output image. I didn't in the case above as my input picture was already 4000x3000.
The results will differ according to which pictures you have chosen for your library and your input picture.
The process will also take a while if you select thousands of pictures for the mosaic, and will also consume a fair bit of memory.
Below is a photomosiac created with my own photos (using the commands above):
Try Andrea Mosaic under Wine, which works perfectly in a GUI and creates awesome Mosaics based on your pictures.
You simply choose the image that you wish to represent with pictures, add the galleries of pictures that you wish to use for that purpose and with minimal adjustments you'll be able to create amazing images like this one:
Low resolution image, the mosaic is too big. The original can be seen in my profile's picture.
From the site:
On Linux you can run AndreaMosaic successfully with the free Wine Emulator which is available on most linux distributions using the standard installer (Synaptics, etc). After you installed Wine download and execute the AndreaMosaic Windows Setup. Click Here for more details about AndreaMosaic under Wine.
You can create a photo mosaic online on Ubuntu or another platform using PicMyna online service.
Here's a sample photo mosaic made using this website:
disclosure: I work for the company that owns PicMyna service.