Computer Graphics Stack Exchange
Computer Graphics Stack Exchange

Questions tagged [video]

17 questions
8
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3 answers

How to denoise video?

Video noise is random and not correlated in time. I assume, the best method is using wavelet denoise in this case, right? If yes, how is wavelet denoise implemented for video? Is there something to consider in order to apply the calculation to the…
p2or
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7
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1 answer

What is the state-of-the-art on using computers to "clean-up" images?

TWO PART QUESTION - We've all seen the movies/TV shows where the police/feds/spies use computer software to take a grainy photo and do a "clean-up" to see a better picture and more details. I assume the concept is executed by some sort of uber-power…
O.M.Y.
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5
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3 answers

Was Evans & Sutherland CT5 really created in 1981?

A few days ago I found a video on Twitter showing the Evans & Sutherland CT5 Flight Simulator system. It was labeled as 1981 footage and looked really amazing. The first time I saw similar 3D grahics in computer games was in the late 90s and in ealy…
Gonrah
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4
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1 answer

Non real-time rendering on Unity3D

I made an audio visualizer using Unity3D (you can see it here) but I am not satisfied on the video quality, as the compression destroys the graphics. I recorded the screen during a real-time rendering. I tried many screen recorders, but always the…
L. Chaumartin
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2
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0 answers

debugging VGA signal timings for 640x480 @ 60hz

I am trying to get started with implementing a basic display (i.e a simple red screen) onto a VGA monitor by programming a Xilinx spartan3a fpga for the same. I have studied about the signal timings for a 640x480 @ 60hz display and implemented the…
nalostta
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1 answer

A way to save 360° panorama video

What is the best way to save video from faces of a cube? The render can produce 6 squares (90°x90°) of 1024x1024 resolution. Faces oriented along axies and only position is changed continuously. I want to save them into the video stream and then…
Tomilov Anatoliy
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2
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0 answers

Converting from 360 degree vr to rectangular

What I am interested in doing is taking a 360 degree stereo video (Oculus Rift etc), and a description of how the viewing direction changes with time (rather than reading from gyroscopes) and then rendering that to a simple side by side rectangular…
John Allsup
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1 answer

Is it possible to decode and play e.g. 60fps video as 30fps, if computer is too slow for 60fps?

I am wondering this, as e.g. YouTube offers some videos 60fps, but computer may be too slow to play them.
jarno
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1
vote
2 answers

Rendering 3-D point clouds obtained from depth maps as a 2.5D video

Suppose I have code to generate a bunch of frames, each of which is a depth map(I have access to the matrices which represent depth) which in turn is used to generate a point cloud. One frame would look like this: In short I have a point cloud…
Ashish Rao M
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vote
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YUV (NV12) Chroma subsampling while converting from RGB image

I convert RGB input to YUV 420 semi-planar output using compute shader.Luma plane is straightforward as it maps 1:1 with RGB dimensions. As we know, NV12 packs Cb and Cr into one plane, which means the CbCr values must be calculating from…
Michael IV
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Is 100 Hz really 100 Hz, or is it 99.97Hz

We are trying to check some hardware and our 100Hz video card is running at 99.97Hz. Maybe this is just the natural speed of the chip and it is called 100Hz. I would have thought, however, that 100Hz is very slow for a computer and that control…
Jeff
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Streaming video camera input from WebCamTexture on mobile? (Possibly via WebRTC or websocket?)

I'm building an application where I stream video camera feed from one mobile device to another in Unity. I tried searching for answers, but most of the topics deal with how to display a video stream, rather than how to send it. I tried looking for…
Apolotary
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What fast algorithms can generate not-realistic but quite handsome animated landscapes?

I was looking for algorithms that quickly compute quite nice realistic, or not realistic, animated landscapes, in video format ("animated" = the camera moves, or the water is animated, etc.) But all I found were: deep learning GANs, which are…
JarsOfJam-Scheduler
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What would be an example of decoding-intensive video?

my question might come in a bit weird but I'm looking for something that would be considered very CPU-intensive video to decode (for playback I mean). I would like to have some sample of 1080p and 4k videos that would classify to see if my CPU can…
graywolf
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Why does my Dell laptop monitor give this weird color banding?

I've noticed some very obvious color banding on the screen of my Dell Precision 7750 laptop while watching video (same in every video program; VLC, built-in Windows video player, etc.) Not only does this not happen for the same video on other…
Jez
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