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Colour Test Bars
Posted on October 13th, 2010 No commentsThe drawing below is one I originally produced some 15 years ago as a cross-check on my theory that the spectrum colours originate from edges. It turned out to give quite a large quantity of information that confirms my theory.
Test Bars 1A
Viewing different areas of the above through a prism gives you the various spectra shown below. I have tried 60°, 45° and 30° prisms and find that a 45° prism gives the best overall results. It is also the most readily available, from old cameras and binoculars.
At first the spectra below don’t seem to make much sense. However, if you bear in mind my previous pages it all starts to make sense. Note that I cannot guarantee the colour accuracy on your monitor or printer, I have had difficulties producing the colours actually seen, and some of the colours are definitely “off colour”. In practice you will probably see some faint strips that I consider to indicate that there is another colour in the pigment or being projected.
Note: The viewing distance between the screen and the prism affects the width of the bands.
It should be remembered that we are dealing with energy levels. A black screen radiates approximately 4.5% of the energy of a White screen, so that this may partly explain the less prominent colour bands, as it is produced from Cyan/Blue, Magenta/Red and Yellow/Green phosphors.
The next 3 sketches explain the colour bands on silhouettes of Blue, Red and Yellow.
It should be noted that a higher energy colour will encroach into part of the space occupied by a lower energy colour.
With a black silhouette, (Black being an absence of any colour energy) the Blue light dissipates readily into this area, which sometimes makes it difficult to see. Some Red may also encroach into this area.In the Blue silhouette the Blue band becomes part of the silhouette that is radiating the same energy level. The energy gradient from White to Blue is less than the energy gradient from White to Black therefore there is no separate Blue band. The Red band encroaches on the Blue area creating a turbulence we perceive as Magenta.
With the Red silhouette the energy gradient is less therefore we lose the Red band.The Cyan band merges into the Red area creating a turbulent mixture we see as Magenta. The Red band is part of the Red silhouette, which leaves us with a Yellow band.
With the Yellow silhouette the energy gradient is only one step, i.e. White to Yellow; therefore there are no intermediate colour bands.Magenta and Cyan.
Now let us consider the ‘oddball’ colours, Magenta and Cyan. Both of these, as silhouettes, give a clean strip without any side bands when viewed through the prism. (Note: There are some very narrow bands but I consider that these are caused by carry-over from the screen phosphors.)
This is due to the high turbulence between White and the Blue in both Magenta and Cyan. The eye/brain cannot accurately determine the ratios of colours due to the fluctuating energies, but is aware of which section of the cones the signals are coming from, and the brain decides that fluctuating energy in the Blue area of the cones plus White light gives us Cyan, and that fluctuating energy in the Blue and Red areas of the cones plus White light gives us Magenta.
Without the high proportion of the White light, the brain can handle the fluctuations giving us Purples, Mauves etc. in various hues.
Screen or printed colours are a problem. I have not yet been able to reproduce the actual colours obtained from edges and prisms. The White intensity does not affect the primary colours Yellow, Red and Blue. Nor does it affect Cyan and Magenta. I have checked this using a White intensity three times greater than the screen White without any perceived difference.It does affect the width and intensity of other colour band combinations. There should be no Yellow in the Magenta but Magenta has approximately the same energy level as Yellow.
As in the Yellow ’slit’ we have the Red band adjacent to the black edge, then a beige colour. (Red and Blue from the Magenta and and a small amount of Yellow from the White component.) On the left side we have a Dark Blue against the black, and then a Mid Blue, ( there is insufficient White to produce Cyan. )
The use of these test bars gives us a method of accurately determining ‘True’ colours and also giving an accurate specification for any colour. At present there are no reliable standards for colours. You can compare colour charts from all sources without getting a match for a stated colour. It also gives us a more reliable method of measuring colour blindness.
Blue Slit
Red Slit
Yellow Slit
Obviously my method of using the computer monitor as the colour source only gives approximations. As a pensioner I am unable to spend £millions on buying equipment. My total outlay on scientific equipment for this series of experiments was under £5.00.
The extra energy added to the colours due to the radiated Black screen energy of 1.5 micro amps made a serious distortion in the colours, particularly the Blues.
Author – Brian Williams
28 responses to “Colour Test Bars”
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I like that you go straight to the point in your latest posts, appreciate!
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偵探.
It is up to the reader to check, because this is the only source of new research into colour and is the reason that I have published it. It is quite simple to do and is explained in the posting. Real research does not require £millions of public money , it just requires common sense and curiosity.
Regards
Brian -
I think you’ve got something good here. But what if you give a couple links to a page that backs up what you’re saying? Or maybe you could give us something to look at, I could revisit & read more sometime soon?
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I’d should test with you here. Which isn’t something I often do! I enjoy studying a publish that will make folks think. Also, thanks for allowing me to comment!
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Awesome post but honestly the sheer amount of Google Ads really make our experience much lower.
THERE ARE NO GOOGLE OR ANY OTHER ADVERTISEMENTS ON MY WEB SITE. THERE IS SOMEONE OUT THERE WHO IS TRYING TO DESTROY THIS SITE, BY USING HIS/HER WEB SITE TO COPY POSTS FROM MINE. THEY THEN FILL IT WITH ADVERTS AND SPAM IT AROUND THE WORLD. I AM ATTEMPTING TO GET THIS STOPPED. IF ANYONE HAS ANY INFORMATION, (ADDRESSES, IP NUMBERS ETC) PLEASE CONTACT ME>
BRIAN
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The crux of your writing while sounding agreeable initially, did not sit well with me after some time. Somewhere within the paragraphs you managed to make me a believer but only for a while. I still have a problem with your leaps in assumptions and you would do well to fill in those gaps. If you can accomplish that, I would certainly be impressed.
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Hi, this was the most difficult post to do, mainly because of the difficulty of showing the correct colours on screen. There is also the problem that it is essential to read the colour posts in tha order shown on the Home page so that you will be able to get the knowledge to understand the following post.
Brian -
Wonderful issues altogether, you simply won a logo reader. What might you suggest in regards to your submit that you made some days in the past? Any sure?
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All my posts should be on the “Master Page – Index”. I sometimes delay entering new post on the master page but I am checking them at the moment.
Regards
Brian -
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What I wouldnt give to have a debate with you about this. You just say so many things that come from nowhere that Im pretty sure Id have a fair shot. Your blog is terrific visually, I mean people wont be bored. But others who can see past the videos and the layout wont be so impressed with your generic understanding of this subject.
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Why don’t you define exactly what you are referring to? We can’t have a debate if we don’t know what you mean. I assume that you have a degree in physics. If you read the complete section on colour it is quite obvious where I am coming from, and the evidence is overwhelming and easily reproduced and verifiable. For 100 years we have physicists proposing hundreds of half-baked hypotheses that are pure fantasy and have no scientific basis.
About 10 years ago I was asked by a BBC radio station if I was willing to have a debate on radio. It was cancelled because they were unable to find a physicist willing to participate.
Brian -
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My site is not “set-up” for any particular browsing system. Any Browser should be able to handle my web site and I get many hits from opera users without problems. The problem must be within your complete system.
Brian -
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What are you stating, man? I realize everyones got their own thoughts and opinions, but really? Listen, your weblog is interesting. I like the work you put into it, especially with the vids and the pics. But, come on. Theres gotta be a better way to say this, a way that doesnt make it seem like most people here is stupid!
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If you really want to understand it go to the colour section and start at the first item and work your way through. Some poeple are stupid, e.g. I don’t have video on my web site.
Brian -
Great and interesting topic here!
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No computer program has ever been able to compose any articles. They can occasionally produce strings of words that appear to make sense. They could fool another computer into accepting it as “sense”, but not most humans. A lot of the Worlds spam is generated by computer programs.
Brian -
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