The Secret of Chromakey

[@SomeOne-fx9kr]

I LOVE how dense the information is. They don't waste time repeating things unnecessarily, and they speak quickly. What a great show. Wish this was in the States when I was growing up.

[@markfoz7248]

Yeah well noticed. No hanging around, punchy and pacy great programme; would have loved it growing up.

[@I_WANT_MY_SLAW]

They did have an American version. It was called 321 Contact

[@ragnarok7976]

When you make education interesting you don't need to hammer it into anyone's head. They watch of their own will and they learn because they want more.

[@Witchblood]

@@stevebloomer7027 its kinda sad what we have for children

[@Notthetylor]

Please let me know other channels like this one😊?

[@koholos]

Man, I’ve worked with digital chroma key masking for 20 years, but it never even occurred to me that they would have done it with physical bags and the like on television. That is so cool. I feel like a kid all over again watching this.

[@RationalSaneThinker]

Back when I was a kid, before the digital age, a meteorologist made the mistake of wearing a blue tie. It was hilarious but also a bit frightening to see parts of his chest disappear as he moved around.

[@TheKnobCalledTone.]

It's amazing to think that just three decades later any bozo with a green screen, a smartphone and some editing software can do the same thing at home.

[@TAIR736]

anyone can do it now using filters without a green screen with ai

[@arstulex]

@@TAIR736 Not quite. Those filters aren't quite up to the same level yet.

[@koholos]

If they light it properly. Too bad most of them don’t, so their keying moves weirdly when it shouldn’t.

[@TheTrippersMindTrip]

No way man... That's kind of impossible. These new fangled gadgets...

[@PeterParker-vq2cz]

and yet, most still dont know HOW its done :P

[@eightfivetwohk13]

I haven’t seen this for almost 35 years bought back so many memories.

[@theyiddleryeeter7622]

You learn 50% more when the instructor has an Australian accent.

[@RationalSaneThinker]

Yeah, here's proof. This very popular Australian science show later aired on PBS for American audiences. Critics say that he made science sexy and he became somewhat of a sex symbol. In fact, when his show ended, he had a career as an adult movie performer. Enjoy: kzbin.info/www/bejne/i5yxmIqOpdOsq6s

[@HxTurtle]

yes, you're more likely to listen carefully for this "novelty" part. your brain quickly switches into that, "I've to examine that a little more closely"-mode.

[@James-kv6kb]

The show was made in Adelaide where we had a slightly different accent to people on the eastern states. They seem to put on a fake accent to try and be more Australian where we don't do that in Adelaide lol

[@James-kv6kb]

​@@RationalSaneThinkerok I think you need to rewrite that because the curiosity show was never seen as a sexual thing obviously you're talking about the American version but make it clear

[@sladflob]

I remember seeing this segment as a kid - thought it was so cool finding out how this worked. The panel van in the footage at the start was pretty cool too!

[@rods6405]

all the cars were cool mostly Australain made, some Japanese as well

[@thunderbirdice]

I just learnt it now.

[@noname54eeee]

me too and me too

[@Milkmans_Son]

Thanks Uncle Rico.

[@mrclaytron]

If only he could get back to 1982... He'd take state!

[@milkybarkidd]

Napoleon, you know we can't afford the fun pack! What, do you think money grows on trees in this family? Take it back! And get some Pampers for you and your brother while you're at it.

[@89horizon]

*Australian Uncle Rico

[@nevek20]

in 2022 this is a really great explanation of how chroma keying works at a base level, back when this originally aired it must have been mind blowing!

[@IDMYM8]

This would be the last Curiosity Show video I would watch for today. I SWEAR!

[@Mach1048]

I have very, very vague memories of this show. I'm so glad that I stumbled across this so I knew it actually existed!

[@CuriosityShow]

Many thanks. Curiosity Show featured Dr Rob Morrison and Dr Deane Hutton. A science TV series for children, it was broadcast nationally in Australia (where it was produced in Adelaide) and to 14 countries overseas and dubbed into German for European audiences. It won the Prix Jeunesse International in 1984, the top award in the world for children's TV. Lots more segments at kzbin.info where archived segments are uploaded every week

[@Mach1048]

I'm an '83 vintage from Victoria. I feel this was on ABC?

[@Mach1048]

I'm just glad that this show existed! I remember it been really interesting, and I'm sure my mother liked it too because I stopped asking her questions for a bit.

[@zappawoman5183]

I remember the BBC used to use bluescreen a great deal for Doctor Who, but they hadn't perfected the technique yet and the shimmering outlines were awful and very distracting! Between the outlines and the wobbly sets it was quite hard to suspend your disbelief for the length of each episode! Looking back, it was quite ridiculous but we tuned in almost religiously every Saturday nonetheless.

[@paulhorn2665]

It was awful because it was the BBC. Other countries got it better :-)

[@danmyers2759]

I was about 8 when I first started watching Dr Who and I was terrified.

[@brijwhiz]

I think we and everyone around were more accommodating. It helped us enjoy stuff rather than be grouchy about it :)

[@HaloInverse]

I remember noticing the shimmering outlines and imperfections of cheaply-done chroma-key decades ago... but thinking back, the imperfections were _less_ blatant back then, when viewed on a _CRT_ TV with its inherent "analog blurriness". Old chroma-key viewed on _modern_ TVs/monitors (pixel-accurate, or very close) probably looks more obvious than it might have been originally.

[@sugarshane1985]

Stumbled on this during another Curiosity KZbin wormhole and made me wonder Deane and Rob, being in Adelaide, did either of you have anything to do with the special effects demonstration at the Investigator Science Centre in Adelaide? The whole thing was based on chroma key, and you got to take home a video of your family doing all the cool blue-screen things. I still have mine.

[@CuriosityShow]

Deane and I were jointly ticket-holders No. 1 at the investigator, we didn't do that exhibit, but may have advised. When Investigator closed, along with two others bought the assets and formed SciWorld, which is now South Australia's largest mobile science education outfit. I chaired it for 10 years or so - Rob

[@lobitome]

And to think that the quality & technology is so much better these days, that you can produce blue/green screen videos on your cell phone with just an app. I took video production classes back in the mid-80's, and it is still amazing how much easier it is to do these days.

[@angosalvo5734]

I wished this show aired in my country when I was a kid,I would have learnt a a lot and answered many questions I had as a kid .

[@OGSinisterPotato]

3:33 - "Now let's get rid of the magic carpet."

[@DaveWhoa]

3:22 "wonderful way to fly, very cheap too" lol

[@RockNRoll__]

???

[@kkampy4052]

Didn't explain how you tell the camera to ignore blue, that's what I would like to know.

[@nikhiljose2503]

Not a hundred percent sure but I think the camera still records the blue background and the black box is the thing that switches the blue out for the other video/picture. All that code is probably to complex to explain in this short video.

[@gorillaau]

The trick is to synchronize the frames between the two cameras. That is the camera will be scanning the top left hand corner at the same time was the other camera. When the blackbox see blue coming from the camera, it will switch to the signal coming from the other camera and "paint" in that colour. Yes, it gets very complicated, very quickly.

[@timharig]

@@nikhiljose2503 There would be no code. This was all done using analog.

[@timharig]

@@gorillaau Actually, it doesn't need to switch or paint anything. The amplitude modulation of the signal contains the luminance component of the signal. The luminance is the sum of all three of of the RGB sensors in the camera. If you disconnect the blue sensor there will not be any luminance when the camera detects the blue background. You can then simply the mix the two signals together and the background image will be displayed where there is no signal from the blue screen camera. You bias the mixer so that the bluescreen camera signal overrides the the background camera whenever the bluescreen signal is present. This can all basically be done using an operational amplifier. You are correct that the two cameras would need to be synchronized. This could be done by using the blanking interval and color burst oscillators from only one of the cameras.

[@timharig]

First, this has been done in three distinct ways. Originally, this would have done using photographic film and double exposures. A blue filter would be placed over the lens of a camera and the bluescreen scene would be filmed. Only portions of the picture containing red or green light would be exposed. You then make a set of positive and negative prints. You film the background scene using the three negative prints as a mask so that the background film is not exposed where the foreground image will be. You can then make a double exposure to with the positive plates to expose the background image where the foreground image is. Back when this video was made, they would have used analog processing with video cameras. Professional cameras have three separate sensors for red, blue, and green light. If you disconnect the blue sensor, then the camera will produce no signal where there is only blue light. By mixing the signals together, this will allow the background signal through when there is no signal from the bluescreen camera. Now if of course, this would be done digitally with software processing each pixel and choosing which source defines each pixel based on the color of the green screen source.

[@somakun1806]

Dean and rob are great host. Makes the learning more interesting

[@James-kv6kb]

I was so lucky to go to Para Vista high school in Adelaide ,where our media teacher worked for channel 7 before becoming a teacher. We had a complete studio set up at the high school,even beyond 2000 came and do a epesode there

[@lundsweden]

Excellent episode!

[@chooseaname50]

nice RX4, Monaro with vinyl roof, and XA coupe there.

[@chisel83]

chooseaname50 awesome XA Fairmont coupe

[@LlamaNeck]

I was 100% believing that he was running till he suddenly stoped and explained the illusion

[@analogdistortion]

And just at that mid point between stopping and explaining I was in shock, shaking.

[@gamoep01]

Yeah, me too

[@lovingvancouvermedia1884]

Lol

[@thunderbirdice]

I’m sure he was running but running on the spot. 😆

[@lavendergreen8107]

Whatever happened to camera no.2?

[@EmanuelFrias]

It is probably the one recording him walking around the set.

[@johnthomas68]

We don't talk about camera number 2.

[@89horizon]

Heh heh... you said number 2.

[@matak99]

@@89horizon Remember 89horizon, do do the right thing

[@rods6405]

Good expalination but @ 1:17 "camera does not see blue" is incorrect the black box in control room replaces the blue from camera 3 with all the colours from camera 1

[@Cyba_IT]

Bamboozled at the start there!

[@RepaidTiger]

why does this look like it was made in 2002

[@redalertsteve_]

Repaid Tiger because it was made in the 80s

[@NoOneKnowsMe_777]

Yes bro its very poor...

[@RockNRoll__]

because it was

[@adventuressurvivalinthailand]

You're not serious, this could have been in the 1970s

[@tronmerncutsman]

This show is from the 80s

[@LukeL007]

When I think of Bill Nye I think of a show that focused on entertainment first and information and education second. Remember when History and Discovery were about History and science and not ancient aliens and auctions?

[@sillygoose635]

still better than what we had then, and bill's show was for KIDS,mit was ment to be entertaining and informative

[@RationalSaneThinker]

Hah ... yeah, I used to be fans of both channels. When I tuned in recently, I didn't recognize them anymore. Same for The "Learning" Channel. There is no longer anything to learn.

[@RationalSaneThinker]

America had Professor Julius Sumner Miller. The interesting thing is that although he was American, his media career was mostly in Australia. His very popular Australian show was later shown on PBS to American audiences. Watching it, there's no way to tell that it was an Australian show. In one episode, he even inexplicably used 110V bulbs when Australia has 230V. Critics say that he made science sexy and he became somewhat of a sex symbol. In fact, when his show ended, he had a career as an adult movie performer. Enjoy: kzbin.info/www/bejne/i5yxmIqOpdOsq6s

[@Ravaxr]

This trick is used all the time on Twitch nowadays, except some streamers purposefully wear bits of the keyed color, or use the accent color of their chair as a key color, causing their hat or their chair to have holes in them.

[@wefinishthisnow3883]

Deane on Hey Hey it's Saturday was the best segment of that show. I loved the optical illusion with small and big people which I think they had/have at Questacon in Canberra. Why? Well I'm glad you asked!

[@thomasfenn9017]

I want to cry seeing the tiny stubby clay model of him with the moustache. He's just so small.

[@boudreaux99buddy65]

10 out of 10 would bet this dude could "throw a pig skin a 1/4 mile!" 😁

[@martinwooder4174]

Watch your steak!

[@fourteencrows1244]

Deadly

[@davidribeiro]

It's so refreshing to see a science show for kids that don't feel the need to turn things into a loud party and repeat the same basic concept 200 times. Bravo.

[@AchtungBaby77]

Great demonstration Deane, very well done! I don't suppose you remember which street or suburb is shown in the footage at the beginning?

[@CuriosityShow]

Curiosity Show was produced at Channel Nine(NWS9) North Adelaide - a suburb of Adelaide, the capital of South Australia. I think the scene was shot in a suburban street near the studio (North Adelaide, Prospect or Walkerville). Deane.

[@HxTurtle]

that's so valuable! simply priceless. the way he educates his audience. especially the last part. it might be disguised as just an innocent homework style of task. but it's essentially trying to make people/kids watch out for scams. don't believe anything you see. only bummer, it turned out not to be like overly successful, lol (which is surely not their fault .. they tried the best possible but some that prefer to stick their heads into sand among us are simply beyond help).

[@steviebboy69]

Very informative, what about the other special effect I have heard of Slit-Scan, is that what they used to do that scene in Space odyssey and Dr Who.

[@ChandravijayAgrawal]

I wonder why we dont have such informative shows in india,we only got tarang and gyan darshan

[@thedave7760]

You have You tube don't you? This is a very old show from the 70's from Australia.

[@BlackStoneMoviesMinecraft]

well put

[@redblack9858]

Its amazing how common this is now

[@jessstuart7495]

Now everyone can do this at home using OBS Studio or another video streaming or editing software.

[@johjoh4571]

if these guys were on american tv guys like bill nye would be remembered as nothing more than a fart in the wind.

[@Ptpop]

joh joh So, your saying our American TV is superior with such great shows such as Housewives of New Jersey, Pickers, Pawnstars and Happy Days?

[@CalamityHillMusic]

No, he's saying it's shit.

[@johjoh4571]

no, i'm saying the "i freakin love science" trend is some of the most inane and ignorant bullshit ive seen in my life and i'd like it to be put down like a rabid dog.

[@sillygoose635]

@@johjoh4571 i can say the same about this, and bill is better

[@Trepidity]

Are you saying Bill Nye isn't a fart in the wind? I would say he just certainly is.

[@RB747domme]

That's great and everything, I just have one question. How does it work? Yes, yes I know the principle that he's just described, but how do they get the camera to ignore that particular shade of blue? .. I'm guessing some kind of computery wizardry going on inside a processor somewhere but it would be cool to learn.

[@matthewsaia409]

What i want to know is how they see what is going on behind them? Do they actually see whats behind them or are they looking at a monitor in front of them to know the relative location of things? You can see he grabs the edge of the leaf and you can see it on the weather forecast when they point, but how do they know the relative location of what is where?

[@Worstplayer]

They don't see what's going on. That's why they only make those vague "somewhere around there" gestures in weather forecasts. When doing a movie, you simply film the actor first, and then set up background so it fits.

[@Worstplayer]

As for the principle behind it, it's rather simple: camera records 3 color channels - red, green, and blue. Subtract red and green channels from blue (in case of blue screen), and what remains are pixels that should be replaced with the background. In practice it's a bit more complicated, you can have partial transparency, various methods to filter out color spill from edges etc, but that's the basic principle

[@garyv2196]

why is it a green screen now instead of blue?

[@suryatejas3013]

This is the best show on earth

[@CuriosityShow]

Thanks for your kind remarks. Keep sharing the good news about our KZbin science channel with your friends. kzbin.info Deane.

[@kumarsajal8400]

How big the camera were in those days.

[@fishingfan1500]

Wow, so this is how they did it before the colour green was invented!

[@alexgader8769]

Same concept is using currently, but most of the people are still not aware of this. So helpful and so lovely as always :) ♥️

[@wildeninja2836]

Now it’s all digital and a green screen lol

[@andrewrussack8647]

That’s gotta be Colonel Light Gardens from the 1980s at the start of the clip…..

[@electronwave4551]

With the pace and acceleration Dean exhibited after jogging 20 km, he'd be a shoe-in for gold in the marathon at the Olympics. Took off like a car. 🚙

[@trilllkartel2077]

Dude was ahead of his time

[@Fifury161]

Another gem, thanks for sharing. You can tell this is vintage as they switched over to green screen....

[@smadaf]

You can do it with any color. It was true in the 1950s; it's true now.

[@apststreet8489]

It’s now green screen

[@woodworking6]

Very informative ❤😊

[@redalertsteve_]

I can watch this forever

[@pleitgeb]

How did this end up in my recommended videos?

[@TheTrippersMindTrip]

Dean seemed like such a nice guy

[@CountDrunkula]

It's amazing that we can now do this on our phones.

[@jeanpietrini]

Cold you tell me how?

[@ask343]

Count Drunkula what app

[@ask343]

LoneAlphaWolf23 i can do it on pc with vegas 14

[@surajpalsharma5272]

Kinemaster or Power director best for chroma editing in andriod

[@rooneye]

For anyone wondering; Camera number 2 is fine and well. In fact your watching the fruits of his labor!

[@jaxnean2663]

Really interesting and enjoyable show

[@CuriosityShow]

Thanks. Curiosity Show featured Dr Rob Morrison and Dr Deane Hutton. A science TV series for children, it was broadcast nationally in Australia (where it was produced in Adelaide) and to 14 countries overseas and dubbed into German for European audiences. It won the Prix Jeunesse International in 1984, the top award in the world for children's TV. Lots more segments at kzbin.info where archived segments are uploaded every week

[@marvelfoxmorty5057]

When was this video are shoot?

[@morisd5066]

Probably in 1700's

[@lebro4401]

It pretty much green screening

[@anirudrapal7358]

It went from this to CGI real quick.

[@randyzeitman1354]

When were these made?

[@CuriosityShow]

Thanks. Curiosity Show was a national science program for children featuring Dr Rob Morrison and Dr Deane Hutton. It was made in Adelaide, South Australia and screened nationally from 1972 - 1990 in Australia as well as in Europe, Asia and Australasia (14 countries). So that children could repeat the demonstrations, Rob and Deane would use everyday materials around the home that most children could find easily (eg old tins). In 1984 Curiosity Show won the Prix Jeunesse International, the world's top award for children's TV programs. Rob and Deane are steadily uploading segments at kzbin.info

[@benji274]

This segment would be early-mid 80s I’m guessing

[@angosalvo5734]

Results look better than some shots in modern marvel movies

[@ObiWanBillKenobi]

Cool at-home trick: Today, with the free software OBS Studio and a bedsheet, anyone with a computer can use chromakey! 🟥🟧🟨🟩🟦🟪 Try it!

[@ehrenloudermilk1053]

As an American I'm a bit upset that you guys have kept this gem from us.

[@ashr7590]

I UNDERSTAND SPLIT SCREEN BETTER NOW... PROGRAMMING IS AWESOME

[@yemarican]

thank you.

[@NAICartist]

XD por qué tan antiguo lo que enseñan? Es como estar enseñando en 2018 los colores primarios

[@bertjesklotepino]

Hmm, a key. They use a key. I remember this guy, Ace Baker (who pretended to shoot himself on live radio if im not mistaken, but anyways) He produced a video about Keys and how they might have been used to construct certain videos. Hmm.

[@Adogsmate4267]

Way back in the seventies, my great uncle told me, believe almost nothing of what you hear, and only half of what you can see. Of course he was talking about government's and the media, radio and television.

[@chriskelso723]

It fits, anytime people are involved. Consider how often we all lie to ourselves.

[@scrapgrace]

Holy moly he fooled me good there at the beginning

[@chazzlebazzle69]

That must be an 80's intro

[@TechsScience]

Today it's quite simple to do cromakey effect

[@raeandrewarevalo6438]

Wow its incredible

[@Jose95926]

So, seems like gravity is not linear?

[@XxYERMOM123xX]

nigga wut

[@jaymo3205]

Whenever I get my mind blown in the first 30 seconds of an episode of youtube I tell my cellmate to pour cold water on my head to cool down my brain. Now that successive inmates have requested to be moved to another cell, I am usually alone. I worry for the welfare of my head brains.

[@neslavej8851]

Its like 3000 dollar to made it we have phone already

[@kitsunegiblaze8022]

Tooncis the Driving Cat

[@kings_of_tekken6795]

wow, he just explained the green screen in simple terms.........

[@ricksanchez3176]

Home work: brush up on my 1980's NASA missions? :)

[@msamour]

The good old days when they had blue screens...

[@michaels3815]

So what would happen if a presenter had blue eyes?

[@Ayman-BP]

Better than keylight.

[@SARTAZ]

This used to be so fascinating back in the days.. now its only a matter of some clicks and that's it

[@badoobadoo6154]

damn its addictive

[@eldenboi8354]

He looks like the uncle from napolean dynamite, its actually kinda freaky.

[@yeahyeahyeah5089]

somehow this is really interesting even tho pretty much everyone knows this these days

[@CalamityHillMusic]

4:41 That smile is creepy as shit.

[@alasyon]

Calamity James Oh, that is brilliant!

[@Fettupwithyou]

And I thought that seeing is believing

[@Tristan_jpg]

No, but believing is magic

[@NigelThornbery]

He looks like uncle Rico in Napoleon Dynamite.

[@mmachefert]

That's how they do the space station !

[@blocksarefun1]

Nah M8

[@MeaHeaR]

Ivé Scené é Khromá Quáy uséd

[@LapisCyborg]

The first 50 seconds are really quite funny

[@92kosta]

All those Twitch streamers could learn a thing or two from this video.

[@therearenonamesinthevoid5772]

I wish this show made it into my life when I was a kid, ive watched a lot of episodes, even on topics that i am already knowledgeable of, but theyre both fun and interesting.

[@Eduardo_Espinoza]

Is that how Skype works?

[@spiralnapkin]

Wizardry.

[@jontesgamlakanal2992]

This video is very old

[@prefeitobear9209]

uncle rico is awesome

[@randomcharacter6501]

If only he knew in the future all movies would be made using this one effect.

[@Cukito4]

Back when it was blue and not green.

[@Thorpe]

Either one is used today. Green works good with digital production but can spill on edges and blonde hair. It works good for daytime or light scenes. Blue requires more sophisticated lighting and works good for night or dark scenes. Blue is a common clothing colour (jeans) so green seems more appropriate to use for a streamer.