Many of you had seen a photographic mosaic on the photo artists’ works, maybe on the posters on the web-sites’ design. It’s amazing how can be a picture divided into the smallest elements – separate elements of a certain color and brightness. The traditional mosaic art is based on the same principle.  
 
We’ll try to get together a couple of hundreds pictures, place them by rows in the same file and then place on them the main picture. This technology will allow us to design very easy and effectively an exotic work on a certain topic out of a pictures’ collection.

1. For the beginning we have to create a folder and copy out all the pictures the next mosaic background will be composed of.



2. Next we’ll create the action for the appropriate changes on the images’ sizes. Open one of the pictures and open also the palette Actions (Window > Actions). On the palette’s menu select New Action option, giving for the action a title, for example resize_photo. Now everything we do is going to be recorded in this action.





3. Select in the menu the next options: Image > Image Size. Move off the marking near the selection named, Constrain Proportions and then mark out another selection – Resample Image. Insert 2.54 cm (72px) for the fields, Width and Height and 72 pixels/inch – for the Resolution field. Press then OK and save the file. Close then the window. Now we have to press on the grey element STOP on the Actions palette’s bottom. Recording of the action is finished



4. Find in the menu the next demonstrated selection: File > Automate > Create Droplet for saving the recorded action as droplet (small applications that automatically process all the files that are dragged onto their icon). Select Choose button and here select the folder the droplet will be saved in. It’s better for it to be saved in the same folder containing the mosaic pictures. Find in the Action palette the recently created action and press OK.



5. Get into the folder containing the files, reserved for the mosaic, select all the files in the folder and drag them out on the droplet’s icon that we’ve already saved in this folder. As a result we’ll get all the files resized to the size of 2.54x2.54 cm(72x72px) with the resolution of 72 pixels/inch. But it will take some time.



6. Now we may represent out of the resized files a contact Sheet that will compose later the background of the mosaic to be. Choose out of the main menu the selection from here: File > Automate > Contact Sheet II.



7. Press the Browse button from Source Images section and select the folder, containing the ready for use pictures, reserved for the mosaic.



8. Find the Document option to insert the general mosaic’s sizes. We’ve chosen the next ones: Width—1280px(45.16cm), Height—1024px(36.12cm), Resolution—72. Get confirmed that the Flatten All Layers option is marked with a tick.