TC2: More RGB Weirdness

ladies and gentlemen it is time for a technology connections to video following up the original one if you got here without seeing the original video well hello it's good to see you for your convenience I've provided a card which you can click on to visit the original video should you choose I think it will help give a little more context into what we are doing here so I would consider it recommended viewing but I won't judge if you decide to just watch this one what we are doing here is we are taking a deeper look closer look into deeper dive whatever into the differences in color reproduction when using a truly white light source and an RGB white light source now keep in mind that the color rendering index of LEDs is not perfect but we've gotten them really really close to essentially perfect I think if it's to be believed the CRI of the lights I'm using is 97 it's at least 95 so now I will note that people point out that the CRI to actual process for determining CRI is flawed but still it's a very close to full spectrum lighting for most intents and purposes so this scene has a lot of colorful stuff in it and I will give you a fun fact I shot this in blue originally and you may notice that one of the markers is not blue I had some problems with fluorescence of certain things under blue light and I will show you some more of them but there was an orange marker here and it's cap was just vividly fluorescent under both blue and green light so I was like well gone so that is why there's a space here there wasn't I wasn't planning on there being a space but the orange marker was a little too vibrant a little too excited that's a fluorescence joke alright so other thing I wanted to show you the exposure this is the actual exposure between normal white and RGB white it is little the light is much brighter under RGB white so I had to tame it down and this is be normal white and RGB why oops I just got a text message anyway back on track so the the exposure I did I think I did a pretty good job as to me because the other thing was I couldn't really see what the difference was so I was just basically like I couldn't get a before-and-after look so I was just basically taming it down to what I remembered and for the most part did a good job and you'll I think the best thing to look at too for comparison exposure levels is the white of the marker and also this is a good point to start the white of the markers doesn't actually change all that much what you see is a slight difference in white balance the markers appear to be or the RGB light looks to be balanced closer to maybe 6000k whereas the true white is balanced at 5,600 K it might be 50 400 K but I think is 56 so it's definitely a coups wrong one it's definitely a cooler light but that shouldn't mess with colors all that much at least definitely not to the extent that the RGB is messing with red so red is obviously too vibrant here so the things that are too vibrant the snake is a perfect example look at its head which is orange and its body which is not a very bright red it's not super bright like if you look at the marker its it's a pure red than this and in fact let me do a color picker look at how far down the color is this is not a very bright red it's it's certainly more of a burgundy but let me go over to the RGB light oh it's much much brighter let me for consistency's sake right in the center at the two white spots there okay so this is what you should be looking at I'll zoom in on that and now the same spot under RGB it is way way more saturated and that's what the color red just in general tends to have this happen to it so let me take a reading on the marker here you'll see that this is pretty saturated but it's not all the way up in the corner whereas if I go back to our oops the see overexposed let's go back who are wicked red that is man very very close to 100% saturation which is just in the real world objects don't look like that and in fact you know with my eyes seeing the scene under RGB white light in particular Reds were just too freakin red and you see it in this scene really well the Rubik's Cube stickers don't show it quite as much but well actually maybe they show it more consistent is not this is a pretty dull red let's take a sample if you look at the burgundy the color that it is it's actually out of context it looks more like a burgundy and then if we go to our very wrong looking photo then in fact this is what I should do let's put the correct red on top of this yeah that is quite quite different and let's go do in Reverse we'll take a reading on this um that red here okay this is just to red to red and then another thing I wanted to look at was this orange gets shifted much closer to red look at it's a little like we do still see some difference but if you I mean look at where look at what the hue is actually at it's it's sitting right on red even where can I give it to move I can't that like this only looks orange mainly out of because of context it's it's Wow this is weird I didn't even think so that I wonder if I just this is truly one of those things where I wonder if I didn't know that the snakes the head was orange if this would still look orange to me how much of this is just my prior knowledge influencing what I'm seeing I don't think so I don't hmm I don't think my visual perception is that influenced by my prior knowledge but maybe it is because I'll tell you looking at this color that is a red and in fact you can see the ring going into the snake's body it's practically the same color some weird stuff okay so just some other things to note looking at the construction paper label here again these the these colors blues do get pushed a lot to the color that doesn't really change much under RGB lighting is green and that kind of that sort of makes sense because our eyes are most sensitive to green and being that the long and medium cones are both pretty sensitive to green light it might be that okay well even if a third of the light is green that's kind of more normal but having a third of the light be blue is also wrong so if you look at you know I was concentrating on the red marker but the blue marker - gets quite a lot more intense and this blue on the cradle of thing gets much - in fact this is I didn't notice this the spectrum in the under the Crayola mark or logo that the blue part gets very bright much brighter under RGB lighting than white light same with the red so basically blues and reds in general are getting pushed way to saturated under the RGB light so let me take a just for poop and laughter a blue here compared over here yeah it's too blue and again look at that set this is like perfectly saturated blue all the way up there it's it's a so they're basically no white in this color at all it is purely blue it's a little more cyan it's a little more toward cyan than perfect blue kind of curiosity what is this blue sticker as is even worse I had but the fact that it's all the way up in the corner like that means that that is a practically completely saturated color because if I look at you know if I take the white that's way over here towards white still a little bluish but I should look there see that is Boop all the way white because it's pushing the exposure it's a little overexposed okay how about we move on to another thing pairs putt-putt I don't want to get too much into putt-putt because I kind of like one over this a lot in the video but again going between and this I've already done the exposure compensation going between these two the the purple is just so wrong it's not even close to correct so this purple is it is a purple like to be fair they said I'm going to write on his cheek call it a professor whatever you want to call that so that's this purple it's kind of like a lavender here you can see it's it's like a look you know what I should do man I should have thought of this hang on I'm just gonna make the blank canvas all so that we can put so that is that is the color we were seen oh boy now we got to go back to it okay so this is that purple okay now this is correct putt-putt color and you can see it's actually more it's actually more towards magenta this is interesting to me as far as the hue it's closer to pure magenta it's just not it's not 100% saturated so it's got a lot of gray mixed into it too so it's a darker magenta so if we go back to here this is the color putt-putt is supposed to be and you know depending on I like to me these are very very different colors if your color perception is different from mine you might think they're closer just do the same but not at all correct but the other thing to keep in mind is that white lips white balance is whoa what am i doing where did puppet go okay he's all over there okay white balance is affecting this too because we see that this white is a cooler white interesting it's considering this white to be bait okay there's a better meaning of it this awfully purpley with white depending on where we're clicking and then the real putt-putt white is much closer to actually white was it I wasn't paying attention hang on now that's pretty close to white that's not though that's pushed over anyway so white white balance does confuse this a little bit and the other thing which I didn't mention I wanted to put a note on screen I don't know why I didn't do this because it was definitely my mind to do it is that the the color of the table is also influencing how we perceive this color because the table goes from brown to kind of purple so that also influences how we're seeing the color but definitely these are different purples they're not the same purple by any stretch of the imagination though it is interesting that out of context this almost looks like it would be the more correct purple but in fact this is the correct purple let's move on from putt putt putt putt putt and by the way if you don't know what putt putt is I if you think I've just named this random plush toy I didn't - this is a series of kids games I don't even know why I have this plush toy I found it at my parents house so presumably they bought it for me and my brother when we were really little but yeah anyway so that's why I have this I don't even know why but presumably my parents bought it okay so this going to this this scene here again I showed just how this is what the exposure was before I corrected it the thing that I want you to focus on here and the reason why I include it was yellows so the game boy is very much pushed towards an orange under the RGB light so the dandelion color of the gameboy color is certainly not a pure yellow so it's not like you know it's not like it's fair to expect it to what was that where is like going with that it's not a pure yellow so it is shifted towards red a little bit but under RGB has shifted much more to red so let's do our same color experiment here yeah definitely look at that this is this is past orange almost when you look if you're looking at just the hue it's changed a little bit by the fact that we're you know we're outside of the 100% saturation area but this looks mm-hmm this is very different for what I was expecting so let's go back to here and see this is it's it's still a little orange like I said this isn't a pure yellow but this is um it's just wild and this this is it this is a thing that like honestly had not really clicked with me is that I knew that we don't because you might think why are we so focused on having phosphor coated LEDs why don't we just use RGB LEDs if we see the world in RGB couldn't RGB LEDs just replace everything and it's like no not at all colors don't look right if you don't have the whole spectrum just they can't look right so let me um let me compare let's do the same out of context comp comparison so this is the actual game thing again it's interesting because out of context this looks much more much more orange than you might think it actually is but when we actually grab a sample and put it next to here that is whoa again this is surprising me just doing this doing this this is such a different Wow and then just to make sure you know like if I put a dot there that you can't see the dot that is in fact the color that this is until I get down there you don't notice that I mean painting anything then if I put that dot there it's like yeah this is it's almost like a peach color as tough as what that turned so again just color science it's very complicated stuff and you it's just amazing really I'm having fun I hope you're having fun because I'm clicking around I get to click on the stuff you just have to watch this very poorly produced video other things to see we already looked at putt-putt we already looked at this thing let's move along okay the construction paper I wanted to include the construction paper for a couple of reasons one because I never actually I never actually included in the video what the real colors were because I didn't write a piece in it to be like oh and by the way here's what the construction paper looked like so what looked to be this with in all red was in fact this so there's a lot of pink and and these for whatever reason to read sheets and an up on top but there was in fact black so if you look at the if you look at the red and you see this that is actually black but this color here looks very close to black when in fact it's blue and interestingly the purple then again this goes to this is another just interesting thing to see is that the purple and the red light looks much much brighter than blue even though under white light the blue looks pretty close to purple but again that's because purple is dark magenta so this is reflecting blue and red it's just absorbing green essentially whereas this is absorbing green and red so if you're if you shine it with red it's gonna reflect almost nothing but the purple will still reflect basically the same amount of light that it was reflecting with white light so under red light this gets much much darker but this doesn't really get darker at all but the other thing I wanted to show was even with green light I was having fluorescence issues with this paper I didn't want the the beginning of the video was very red heavy and I didn't want that because it was like I keep showing this under red light and monochromatic red light to me doesn't look as odd as blue and green but even with green light the orange paper was fluorescing a bit and you could see that like well this is a different color this is not just the different shade of green you can see looking at the cover because this is this is a glossy on print it's not actually construction paper this is all incomprehensible it's all just different shades of green but here you actually see this it looks kind of red this looks kind of orange and in fact this looks to be well I might just be seen it because the orange underneath it but under blue the fluorescence is even more intense this is also and again if you look at the cover sheet you can see that like you can't tell colors apart but the actual paper the bleaching agents that they use do fluoresce although I'm not sure what exactly is because it's construction paper so it's not gonna be a bleaching agent I'm at oops I imagine it's part of the dye that makes the orange and the red and it just fluoresce is under both green and blue light but yeah so that's why I put that here other thing um this is the red object scene I happen to have the box of my phone which has this red insert it was fluorescing a lot too so fluorescence was something that I wasn't really encounter and expecting to encounter a lot but I didn't some of the things I was setting up who's like oh great that's fluorescing so this image right here is lit under you could it's not really cyan because the light on the right is blue and the right on the left is green so that's it overall at cyan but there's some different like there's a gradient going on but this does box it's not shouldn't you shouldn't be able to tell it's red although interestingly and you may have caught this in the video that that's a sketch I don't know if it's fluorescing I think it's just a little a little bit or what but you can kind of see that that's red in fact let's let's poke at that color yeah it's like a very very very dark magenta but you'll notice this on to the right so it is more like so correct me if I'm wrong with the way to interpret the color space here is that the top right is a hundred percent few hundred percent saturation this is 100 percent hue but more black and then this is more white and then this is actually true black so this a lot as you're over here this is like gray but going to the right it's getting more saturated in color and as you're going up you're getting more towards white so I'm pretty sure I'm interpreting that correctly but the way that so this would indicate that it is actually fairly magenta and it is you know close to black which obviously it is but it is actually a bit red this color is definitely red yeah so this was this was just a thing I wanted to point out and also I wanted to go through these pictures actually showing the RG and B because I didn't really do that in the video all that much so here these three images you've got and remember that the subject of this was to because you have object so here the blue you know obviously things that are white look blue and then things that are red look black or gray going over to red then the thing is and I didn't show this under pure red light now things look very odd because a lot of the a lot of the things that used to be distinct from white are no longer so you look at the measuring cup you can't really see the markings on it anymore the paint can or the spray paint can lid looks almost the same as the white and then this this is a little red cap from a clearance marker like from a trailer don't ask why I have that but it is it's not really noticeable in this scene but one of the things like on camera didn't pick this up but one of the very strange effects of this object in person was that under red light it appears to become transparent whereas under blue light it looks black and under green light it also looks black because it doesn't let blue and green light pass it only lets red light pass so you kind of see that it becomes transparent looking but it's it's not quite it's not quite obvious here but so the other thing is you know just looking at the scene all all the red objects look just way too bright if you look at the RCA cable well red and white now you can't really tell them apart believe the one in front is red yeah definitely because now it's black oh whoops the other thing just to watch is the Rubik's Cube because you'll see how different sections become bright a dark interestingly green and I guess this makes sense green the more more of it looks light then because the only color that doesn't reflect any light with green is red all the other stickers orange is gonna reflect some green yellows and reflect a lot of gray and white of course is all green and blue in fact will reflect most of the green back and then interestingly I don't know if you can tell but this maybe this is fluorescing a bit too or else it's possible that I don't have it set to pure green in this image and I'm just not sure that I'm not aware of that but the blue looks a little distinct from these other colors let's let's do some hue spottin yeah this is a cyan as that's more of a green it's also more of us than those so maybe this isn't pure green I thought it was apologies if it's not but definitely just going through and seen oops seem like the white is definitely bright blue is pretty bright too but it's still absorbing some of it cuz it's a very dark blue and then you go to red and it's like well blue and green now just become practically indistinguishable and then green now all these colors light up so I found that to be interesting as well ooh whoops this might be the end of the things that I wanted to show you uncovered that we covered that we can break that got putt-putt we got our game boy in particular our weird colors blue cheese construction paper alright so I hope you enjoyed this extra look into the weirdness of color and how just how weird it is it's pretty weird man and again if you didn't see the original video you might want to check it out I'll put a link in the description and thanks for watching also if anybody wants me to do more of this the only reason why I'm not looking at anything other than what was in the video is because I am not at the studio and I cannot do I left the lights there so even if I brought a light here at home I did I don't have one to add other things so if you want to look at more stuff if you think you might want me to revisit this later let me know but for now yeah thanks for watching

Channel: Technology Connextras

Views: 61,165

Rating: 4.9530554 out of 5

Keywords: technology connections, TC2, technolgy connections 2, RGB, RGB light, monochromatic, putt-putt

Id: gN5TSzRUxKk

Length: 24min 48sec (1488 seconds)

Published: Wed Aug 28 2019