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Multi-scale Camouflage
- Apr 23, 2018 -

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Multi-scale camouflage is a type of military camouflage combining patterns at two or more scales, often (though not 

necessarily) with a digital camouflage pattern created with computer assistance. The function is to provide camouflage over a 

range of distances, or equivalently over a range of scales (scale-invariant camouflage), in the manner of fractals, so some 

approaches are called fractal camouflage. Not all multiscale patterns are composed of rectangular pixels, even if they were 

designed using a computer. Further, not all pixellated patterns work at different scales, so being pixellated or digital does not of 

itself guarantee improved performance.


The first issued pattern was the Italian telo mimetico, which was on a single scale. The root of the modern multi-scale 

camouflage patterns can be traced back to 1930s experiments in Europe for the German and Soviet armies. This was followed 

by Canadian development of Canadian Disruptive Pattern (CADPAT), first issued in 2002, and then with US work which 

created Marine pattern (MARPAT), launched between 2002 and 2004.

 

Principle


Scale invariance[edit]

The scale of camouflage patterns is related to their function. Large structures need larger patterns than individual soldiers to 

disrupt their shape. At the same time, large patterns are more effective from afar, while small scale patterns work better up close.

[1]Traditional single scale patterns work well in their optimal range from the observer, but an observer at other distances will not 

see the pattern optimally. Nature itself is very often fractal, where plants and rock formations exhibit similar patterns across 

several magnitudes of scale. The idea behind multi-scale patterns is both to mimic the self-similarity of nature, and also to 

offer scale invariant or so-called fractal camouflage[2] that works at close range as well as at traditional combat range.[3]

 

Animals such as the flounder have the ability to adapt their camouflage patterns to suit the background, and they do so 

extremely effectively,[4] selecting patterns that match the spatial scales of the current background.[4]

 

Design trade-offs

 

When a pattern is called digital, this most often means that it is visibly composed of computer-generated pixels.[5] The term is 

sometimes also used of computer generated patterns like the non-pixellated Multicam and the Italian fractal Vegetato pattern.

[6] Neither pixellation nor digitization contribute to the camouflaging effect. The pixellated style, however, simplifies design and 

eases printing on fabric, compared to traditional patterns. While digital patterns are becoming widespread, critics maintain that 

the pixellated look is a question of fashion rather than function.[7]

 

 

The design process involves trading-off different factors, including colour, contrast and overall disruptive effect. A failure to 

consider all elements of pattern design tends to result in poor results. The US Army's Universal Camouflage Pattern (UCP), for 

example, adopted after limited testing in 2003–4, performed poorly because of low pattern contrast ("isoluminance"—beyond 

very close range, the design looks like a field of solid light grey, failing to disrupt an object's outlines) and arbitrary colour 

selection, neither of which could be saved by quantizing (digitizing) the pattern geometry.[8][9] The design was replaced from 

2015 with Operational Camouflage Pattern, a non-pixellated pattern.[10][11]

 

History

Interwar development in Europe[edit]

The idea of patterned camouflage extends back to the interwar period in Europe. The first printed camouflage pattern was the 

1929 Italian telo mimetico, which used irregular areas of three colours at a single scale.[12]


German WWII experiments

Main article: German World War II camouflage patterns

During the Second World War, Johann Georg Otto Schick[a] designed a series of patterns such as Platanenmuster (plane tree 

pattern) and erbsenmuster (pea-dot pattern) for the Waffen-SS, combining micro- and macro-patterns in one scheme.[13][14]

The German Army developed the idea further in the 1970s into Flecktarn, which combines smaller shapes with dithering; this softens the edges of the large scale pattern, making the underlying objects harder to discern.[15]


Soviet WWII experiments[edit]

Pixel-like shapes pre-date computer-aided design by many years, already being used in Soviet Union experiments with 

camouflage patterns, such as "TTsMKK"[b] developed in 1944 or 1945. The pattern uses areas of olive green, sand, and black 

running together in broken patches at a range of scales.[17]


1976 research by Timothy O'Neill[edit]

In 1976, Timothy O'Neill created a pixellated pattern named "Dual-Tex". He called the digital approach "texture match". The initial 

work was done by hand on a retired M113 armoured personnel carrier; O'Neill painted the pattern on with a 2-inch (5 centimetre) roller, forming squares of colour by hand. Field testing showed that the result was good compared to the U. S. 

Army's existing camouflage patterns, and O'Neill went on to become an instructor and camouflage researcher at West 

Point military academy.[18][19]


2000s fractal-like digital patterns

By 2000, development was under way to create pixellated camouflage patterns for battledress like the Canadian 

ForcesCADPAT, issued in 2002, and then the US Marines' MARPAT, rolled out between 2002 and 2004. The CADPAT and 

MARPAT patterns were somewhat self-similar (in the manner of fractals and patterns in nature such as vegetation), being 

designed to work at two different scales; a genuinely fractal pattern would be statistically similar at all scales. A target 

camouflaged with MARPAT takes about 2.5 times longer to detect than older NATO camouflage which worked at only one scale, 

while recognition, which begins after detection, took 20 percent longer than with older camouflage.[20][21][22]

 

Fractal-like patterns work because the human visual system efficiently discriminates images which have different fractal 

dimension or other second-order statistics like Fourier spatial amplitude spectra; objects simply appear to pop out from the 

background.[20] Timothy O'Neill helped the Marine Corps to develop first a digital pattern for vehicles, then fabric for uniforms, 

which had two colour schemes, one designed for woodland, one for desert.[9]

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