Yo what happened?

2021.11.28 10:47 jimmygarterex Yo what happened?

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2021.11.28 10:47 Agima FREE: Create a Node JS backend app and host it on AWS (Free course for now)

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2021.11.28 10:47 UnfulfilledDreamz Action Bronson - Ceviche

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2021.11.28 10:47 Advanced-Theme144 Chroma Key software built with python

Chroma Key software built with python After a whole week and a half, I have finally completed my project, so without a further ado... I present to you all my Chroma Key software.
This program has two functions, one is changing the background of pre-recorded videos and the other is changing the background live, for example when in Google Meets. To use it you will need to take a photo of the background you want to exclude, and then insert it into one of the lines in the file. You then insert another photo that you want to replace the background into the program and run it. I am going to make a simple GUI later on to make this process more user-friendly, but for now I have added instruction in the README.md file on how to do it.
My program uses basic concepts in geometry and statistics to remove the background, and these concepts are what I'm learning in AS-Levels currently. It then splits the video into it's individual frames and edits each of them. The program works like so in a nutshell:
When you insert the photo of the video's background into the program, it analyzes it and returns a list containing all the unique colors present. In my first version of testing these color values where enough to change most of the background, but not all. The reason for this is because of changing light levels. So how do you counter these light levels, you may ask? Simple, create a range of colors in the image that are allowed to be edited.
This would have been very simple with grey-scale videos since they only have one channel, but as we all know videos use three color channels, red, green, and blue. This therefore made it difficult to create a range of accepted colors, since I couldn't just write:
if 18<=image[w, h, 0]<=246 and 65<=image[w, h, 1]<=129 and 10<=image[w, h, 2]<=230: image[w, h] == (0, 0, 255) 
This condition would end up converting the entire frame instead of parts of it, since all pixel colors fall in this range. I would have to centralize it. So the first thing I did was create a 3d graph representing all the color values in the background:
https://preview.redd.it/wjd708yn1c281.png?width=640&format=png&auto=webp&s=6132e059ae5540418c5f2fd22d4d8c8d718b25f6
This graph has the red, green, and blue values along the X, Y, and Z axis respectively. From the graph you can tell that these colors are going from black to white. All I needed to do was construct a cuboid that would surround these points perfectly. This would therefore create the perfect range for comparison.
I achieved this by creating 8 line equations which have the following format of Y = MX + C. These are calculated by splitting the the three color channels into pairs of two, one pair will contain the red and green values, and the other will contain the blue and green values. These values can then be used to create two normal graphs that look somewhat like this:

https://preview.redd.it/dcjq1cng5c281.png?width=1062&format=png&auto=webp&s=a0c422f067e829a59f1dd63eeed38cd7fb53af11
From these graphs I can draw out 4 lines for each of them that surround the lines:

https://preview.redd.it/iq5qesz26c281.png?width=1062&format=png&auto=webp&s=2768d49f4507e9469b4043eb79497b3230d85145
These two rectangles form a cuboid that surround all the color values perfectly. Therefore I can pass a color value and check if it is within this cuboid. If it is within the cuboid, then the pixel color will be change, if not, nothing is done to it.
But there is one problem, the light levels. As you record a video, the light levels will constantly rise and fall. This could be due to the clouds in the sky, or your own shadow against the wall. Either way, you can't stop the changing levels of light. But you can account for them using an offset value.
This offset value is added to the y-intercepts of each of the line equations. It is calculated by getting half of the standard deviation of all the color values. How did I find this out? By shear luck I guess. It took a lot of trial and error but I finally came to the conclusion that this works with any video and background. (Assuming the background is a constant color.) And that's how my chroma key works.
One of the biggest challenges I had with this project was the speed. It took ~6 seconds at first to edit a single frame, and that was just way too long if I wanted to edit half an hour videos or evening use it in google meets. So to speed it up, the program uses the library Numba. This idea was not mine, the credit goes to u/dkxp. He helped speed up my code using Numba and it's speed increased to 0.01 seconds per frame. This speed up was perfect to use for live camera streaming since there wouldn't be any lag. So thanks u/dkxp.
I hope that this works for you guys too, especially if you have an actual green screen. I'd love to hear if it works well and let me know of any problems.
submitted by Advanced-Theme144 to Python [link] [comments]


2021.11.28 10:47 Monstrodolago People from non-English speaking countries: what's your opinion on the use of anglicisms? Do you perceive it as a threat to your maternal language?

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2021.11.28 10:47 xShaggyDoo710x H: 3star handmades W:offers

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2021.11.28 10:47 Anomaly1134 What is your favorite Hamilton song and why?

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2021.11.28 10:47 mammuman Where can I get toy (short) broomsticks for kids?

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2021.11.28 10:47 EDMLiveset Rinse FM Podcast 2021-11-25: Jyoty

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2021.11.28 10:47 chinesedramaworld Top 10 Chinese Dramas with Smart Female leads [Historical Version] | Sma...

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2021.11.28 10:47 REAPERD0C Thanks for the add :)

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2021.11.28 10:47 EDMLiveset The Anjunadeep Edition 377 with William Orbit

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2021.11.28 10:47 Llamayoda Life imitates art

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2021.11.28 10:47 madiekate87 Had a long day but felt cute 🥰👉👈

Had a long day but felt cute 🥰👉👈 submitted by madiekate87 to crossdressing [link] [comments]


2021.11.28 10:47 HiLmAO10 BITS GOA VS VIT VELLOE CSE

Hi everyone,
I got admission in BITS GOA chemical in the last iteration, but am currently 2 months into studying CSE with Data Science at VIT VELLORE. I am super confused as to what to do. If I am to be honest, I am not sure what my interests are. I like coding etc but I don't think its my passion if u understand what i mean. I don't know much about the scope of Chemical in India. Apart from the amazing tag of being a Bitsian, the only reason I am inclining towards BITS is the far lower number of students. VIT Vellore has 3k students ONLY in CSE core(fresher), while I think BITS GOA has a total of 3k students. I point this out as I am not a massive fan of crowds. There is the risk of joining college about 2 months late, missing out on a lot of the syllabus and the whole friend making process (sry for the cringe lol).
I am well-adjusted in VIT Vellore ,I think. Starting to make decent friends and the teachers and students seem alright. I was blown away by the quality of students in my class itself, some of them have such extensive experience in coding and are extremely knowledgeable. Many of them have scored marks in JEE and Bits much higher than mine but seem perfectly content in VIT Vellore. As I said, I am not fully sure if my interests are in coding or cs related fields, and the tag of BITS is a bit of a dream of mine. But not sure if Chemical is a safe branch for me, as I think I am more likely to get to know my interests doing CS.
I have to make a decision by tomorrow, so pls all suggestions would be appreciated.
Thank you
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2021.11.28 10:47 Tiny-Art8472 A Town Built by Cannabis

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2021.11.28 10:47 StanTheManInBK OFFICIAL BROWNS @ RAVENS GAME THREAD: Erin! Why Is The Game So Late?!? Edition

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2021.11.28 10:47 Czarben Emergence potential of mosquito-borne arboviruses from the Florida Everglades

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2021.11.28 10:47 mango4everdo 👜 TRENDY 👠 | Anonymous luxury shopping 🛍️ | 💎 Low mcap | No pump and dump | Redistribution and buyback

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2021.11.28 10:47 pigusluke 12 tabs of some gorgeous acid

12 tabs of some gorgeous acid submitted by pigusluke to drugsarebeautiful [link] [comments]


2021.11.28 10:47 nippertown Today’s Top Tips for Live Music (November 28, 2021)

Best bet: John Pizzarelli @ Caffe Lena, Saratoga Springs.
One of today’s premiere interpreters of the Great American Songbook, Pizzarelli is internationally known as a brilliant fretman with a knack for uptempo swing. He has recorded more than twenty solo albums and has appeared on more than forty albums by other recording artists, including Paul McCartney, James Taylor, Rosemary Clooney, and many others. (two shows, 5:00 and 8:00)
Other Featured Events
“Brunch with Bob” featuring Carolyn Shapiro @ Argyle Brewing, Cambridge. (1:00)
“The Singing Anchors Holiday Show” with Jerry Gretzinger and Benita Zahn @ Cohoes Music Hall, Cohoes. (2:00)
Milayne Jackson and friends @ The Strand Theatre, Hudson Falls. (3:00)
Sarah Perrotta (album release) @ The Colony, Woodstock. (7:00)
For additional listings, see our Calendar at Nippertown.com
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2021.11.28 10:47 EDMLiveset Rinse FM Podcast 2021-11-25: Jyoty

Rinse FM Podcast 2021-11-25: Jyoty submitted by EDMLiveset to EDMmixes [link] [comments]


2021.11.28 10:47 Conscious-Elk To those working as a product manager in tech, do an MBA from a top university worth its value?

Hi, I'm an SWE with masters and I'm interested in making a career switch to a PM role. But I'm not sure if an MBA would be worth its value, considering the hefty price tag it comes with. I already applied to the likes of ISB, NUS, NTU which costs a minimum of 40-50 lakhs but quite lost about their value/influence. Would anyone please advise?
What's the career trajectory of a typical software engineer who makes a career switch to Product Management in tech with an MBA as opposed to SWE being promoted to PM internally? Where do both typically end up with and what exactly does an MBA add ? Do you think a top MBA gives you an edge in tech and help you to learn useful skills that you apply in your daily work? Thanks!
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2021.11.28 10:47 Old_Advertising4990 I installed the device from the helium application, the device was synchronized, it gave its 3-word name, but the device does not appear in the helium application, it may be suspended, how can we solve the problem

I installed the device from the helium application, the device was synchronized, it gave its 3-word name, but the device does not appear in the helium application, it may be suspended, how can we solve the problem submitted by Old_Advertising4990 to HeliumNetwork [link] [comments]


2021.11.28 10:47 diegoisfrench How? What the?

How? What the? submitted by diegoisfrench to ihadastroke [link] [comments]


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