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mosaic tiling

In the field of photographic imaging, a photographic mosaic, also known under the term Photomosaic, is a picture (usually a photograph) that has been divided into (usually equal sized) tiled sections, each of which is replaced with another photograph that matches the target photo. When viewed at low magnifications, the individual pixels appear as the primary image, while close examination reveals that the image is in fact made up of many hundreds or thousands of smaller images. Most of the time they are a computer-created type of montage.
There are two kinds of mosaic, depending on how the matching is done. In the simpler kind, each part of the target image is averaged down to a single color. Each of the library images is also reduced to a single color. Each part of the target image is then replaced with one from the library where these colors are as similar as possible. In effect, the target image is reduced in resolution (by downsampling), and then each of the resulting pixels is replaced with an image whose average color matches that pixel.
In the more advanced kind of photographic mosaic, the target image is not downsampled, and the matching is done by comparing each pixel in the rectangle to the corresponding pixel from each library image. The rectangle in the target is then replaced with the library image that minimizes the total difference. This requires much more computation than the simple kind, but the results can be much better since the pixel-by-pixel matching can preserve the resolution of the target image.
Originally, the term photomosaic referred to compound photographs created by stitching together a series of adjacent pictures of a scene. Space scientists have been assembling mosaics of this kind since at least as early as the Soviet satellite missions to the Moon in the late 1950s. The name Photomosaic and an implementation concept were trademarked by Robert Silvers' Runaway Technology, Inc.

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  1. M

    London Path tiling with Victorian mosaic tile sheets

    We have some Victorian-style mosaic tiles which we need laid on our front path. They are on mesh-backed sheets so no need to lay individual tiles. Each sheet is 30cm x 30cm. There is a concrete base in place, but this has a crack in it so would need to be levelled beforehand. The whole area...
  2. S

    Advice for mosaic and porcelain

    My wife would like the shower cubicle (2 walls inside a quadrant enclosure) tiled with porcelain tiles but with a central vertical strip of glass mosaics. Is there an adhesive that would be appropriate for both? The substrate is waterproof cement boards (Abacus elements brand) with all joints...
  3. D

    Remove stubborn sealer from Travertine Mosaic Tiles

    Good Evening, Kicking myself here, I’ve recently fitted some mosaic travertine tiles around the bath and sink area, and sealed the area around the bath with a water based penetrating sealer. I did a test patch first and the colour enhancement was none to minimal, so felt happy to crack on...
  4. H

    Mosaic tiling bed depth difference

    Hi all, enthusiastic newbie here. Plan is to tile a 300 wide vertical strip of 10mmT stone mosaic, where a shower tower will be placed on top. I’ve worked out so far that I ought to use BAL mosaic fix with a 4mm notched trowel and firmly bash the tiles in as evenly as poss. The problem as I see...
  5. H573

    Mosaic Sealing prior to grouting

    Hi All, I’m a newbie both to this site and tiling. I’ve recently moved to Zambia, the materials here are inferior and the availability is poor. I’m doing a bathroom using mosaic, marble and natural stone. I know I need to seal prior to grouting, but the only sealer I can find is TFC silicone...
  6. J

    Preparation for Mosaics on floor

    Hi all, After some advice. I’m tiling a 4m floor in 1 inch hexagon mosaics. The floor is green chipboard which is pretty secure but I would always use ditramat 25 on it prior to fixing but Schlüter have said not to fix anything under 50mm on to ditra 25. Anyone had the same issue? It’s not the...
  7. S

    Grout colour for border mosaic

    I’m tiling a bathroom with a cement grey tile and mosaic glass border. I’ve tried a couple of different grout colours but the grout I like for the tile (mid grey) seems too dark on the mosaic. Would it be crazy to use a different (lighter) colour grout for the border. And if it’s not a...
  8. Cranbrook

    A question for the mosaic experts

    Been asked to price my first kitchen mosaic splashback in a seriously long time, and the customer is supplying the brick effect type.. but he wants the complete reveals tiled including the heads.. two windows worth.. Maybe im having a dull moment but how do the mosaic folk on here go about doing...
  9. S

    Help needed for mosaics

    Hi a friend has asked me to tile her bathroom to which I said yes I’m it a professional but had done my own house refurbs to which she’s seen anyway she has purchased 2mm thick 300x300 mother of Pearl Mosaics to which she would like cut into 100 wide strips to form a border normal tiles are 9mm...
  10. Sniper

    Glass mosaics In niche

    am I being unreasonable by not wanting to leave a glass edge in a shower niche I wouldn’t mind but the glass mosaics where quite rough ( fired earth ) she didn’t want any trims also didn’t want me to tank it out said it was a waste of money .?
  11. T

    Just had my kitchen tiled with mosaics

    Hi all, new to this forum so thank you in advance for reading my post. I'll try to be short and concise. On Friday my kitchen plash back was tiled with 10mm thick marble moasics with 12.5mm trim by a tiler who had previously done my kitchen/dining room floor. Unfortunately, I feel the kitchen...
  12. J

    Where mosaic meets 60x30 in wetroom

    morning, So I’m tiling the floor today in the wetroom (yup, still on this job!). The tray I’m doing in 10mm porcelain mosaic (4mm addy bed), the remainder in 10mm porcelain 60x30 (12mm addy bed). The mosaic will sit lower. I need to raise it by 4mm so there isn’t a step, how would I do that...
  13. J

    Laying mosaics over a wet room former

    hello, So I’ve been reading a few posts on here about laying mosaics, can’t seem to find anything for wetroom formers that already have the fall built in. Can anyone give me a few tips to laying mosaics over a wetroom firmer please? Area is around 2.5m2 and custard hasn’t chosen mosaics yet so...
  14. Middlesex Tiles

    Fired Earth - Oyster Mosaic

    I have a customer who has been gifted a quantity of Fired Earth Oyster mosaic, Freshwater Pearl They are glass with no backing, and the images on the website seem to show a blueish tinge when installed. I'm trying to find a tile that would compliment them and thinking grey (is there anything...
  15. M

    Aus Oxidised Copper Mosaics

    Hi all, I’ve been asked to fix some oxidised copper mosaic tiles, but having never used this type of tile before am unsure of best way to cut and beat addy to use. Here’s a link for the tiles- Hexagon Oxidised Copper 29.5cm x 30.5cm Mosaic Tile -...
  16. R

    Aus Mosaic feature question

    hi, Im about to install a mosaic center feature up the middle of a 900 shower enclosure, Its 300mm wide foor to ceiling, There is a 10mm square chrome trim up either side but the mosaic sheets are only 6mm Whats the best way to make up the 4mm needed ? Was told to try 3mm ply but was a little...
  17. Adam18Spring

    Aus Where Metro's meet Mosaics internal corner..

    Hi Guys Just a quick one, i have 2 internal corners to do. The walls either side are in standard beveled white metro tiles 100x200mm The end 'feature' wall is in 50x150 mosaic metro tiles: My question is how would you do the junction between the 2? Just silicone the gap? Thanks
  18. G

    Help needed with mosaic splashback

    Hello looking for a bit of advice. I’m planning on doing a splash back above my sink. So far I have the tiles and trim. Was wondering what’s the best adhesive and grout to use as there is glass tiles on the mosaic sheet and I’ve also heard that the tiles need treated with something after the...
  19. O

    Schluters NEW Finec mitre profiles for thin tile and mosaic.

    Ok, so they’re not BRAND new, but @Schlüter-Systems Ltd looking to expand both sizes and colours, to include the Trend line colours. 45degree fine detail profiles to protect mitred edges from 2.5mm all the way up to 12.5mm. So I thought I’d try to get them some feedback. I’d appreciate it if...
  20. A

    False chimney breast..split face slate mosaic

    Hi all I'm a keen diy'er and have tiled the odd bathroom in the past. I'm looking to build a false chimney breast in my living room (timber frame). I want to fix it with split face slate or quartzite mosaic. I'm after advice on which board to fix.. I'm thinking hardiebacker or similar (6 or...
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