.The challenges to achieving a quality VR video experience.We call it “virtual reality,” but the quality of the video we watch in VR headsets still doesn’t look real. Why is quality important?
The feeling of really being there, called “spatial immersion,” is undermined by poor-quality video. Today, a great deal of VR video struggles to achieve immersion, because the poor quality distracts the viewer from the feeling of realism.A true feeling of immersion comes from a combination of narrative and spatial immersion. Narrative immersion occurs when the viewer becomes emotionally invested in the story. Think about reading a novel or watching your favorite movie. You get so caught up in the story that you lose track of time.
Spatial immersion occurs when the viewer becomes convinced by their senses that they are in a new space. When we are experiencing the sights and sounds of a new space and engaged with a compelling story, we can be powerfully moved.
When we get these two ingredients right, we feel like we are truly in virtual reality.There are no hard and fast rules for achieving narrative immersion. But we can define how to make a great-looking video that can fool your senses to create spatial immersion.Many things that are called VR today fall far short of this goal. Services such as Google’s YouTube 360° and Facebook 360° have started to regularly offer 360-degree video content that simulates VR by displaying spherical video in a standard video player. 360-degree video is usually delivered through a web browser or on a simple device like Google Cardboard.
But moving a mouse or holding up a cardboard box to your face requires hand-eye coordination that makes your brain take on tasks that interfere with immersion. Holding a smartphone up to your head is fine for a few minutes, but who wants to do that for a two-hour movie?
A better experience comes from a head-mounted display that accurately and naturally tracks your movement.A mobile phone-based headset like the popular Samsung Gear VR has good motion sensors and fast response times, and is capable of creating an immersive experience. There are many new headsets coming to the market in 2016. The Oculus Rift and HTC Vive are both tethered by cables to a PC, making use of the PC’s GPU capabilities to render 3D data quickly, and using additional sensors to track user motion in more directions than the Gear VR. Both the mobile and PC-tethered headsets have high-resolution displays with plenty of pixels, but when those displays are used to play video, the video quality tends to be poor.Even with good display hardware in a headset, low video quality can break the sense of true immersion. The tricky part is delivering a great looking image to the device at the right moment. Since the Gear VR is the most widely available set today, let’s look at its technical specs and the challenges of using it to achieve a quality VR video experience. The challenges of VR video contentWhile all the headsets have cutting-edge high-resolution displays, the shortfall comes from content delivered at low resolution.File size.
With Gear VR, many of the video-based experiences in applications from VRSE and others require an initial download. The downloads are very large—more than 1 GB in size— and slow to load onto the device. That is the first ding against the experience.Video quality. The second and bigger issue is the quality of the videos. Even professionally produced VR media is alarmingly soft. Viewing it feels like jumping back in time to the 1990s when computers struggled to play anything more than standard-definition video. The VR videos that seem to suffer the most are in stereo format.Certainly the video content must have been captured at high quality, but in the headset it appears very mushy.
The answer is resolution. ResolutionThe Gear VR can support Ultra High Definition (UHD)-size playback. In pixel terms, that UHD video has a frame size that is 3840 pixels wide x 1920 pixels tall.
The video often plays back at 30 frames per second (higher frame rates can be supported at lower resolution). Clearly the Galaxy S6 phone is a little powerhouse that is able to easily play 4K video. But this turned out to be too low a resolution to make a good-looking image.To understand why, we need to answer two different questions about resolution.
What is the display resolution that we are looking at on the Galaxy’s screen? Let’s call this screen resolution. The second question is, how much of that big UHD size image do I see inside the headset?
Let’s call this the field-of-view resolution.The screen resolution on the Galaxy S6 is 2560 x 1440 pixels. So each eye gets 1280 x 1440 pixels to view through one lens of the Gear VR. A short digression: Gear VR lenses distort the image quite a bit, so the practical resolution is really 1280 x 1280. Each eye gets to look at a 1280 x 1280 image.
Not bad, but not exactly “Full HD.” But at over 500 pixels per inch, this should be plenty to make the image look sharp.Let’s return to the field-of-view resolution. Recall that each frame of UHD video is 3840 x 1920 pixels, but this video frame has to fill 360° of the horizontal view and 180° of the vertical view.
On the Gear VR, the field of view is 96°—a bit over one-fourth of the full 360° view. When we view the image, we are only looking at a little square section of the whole frame. As we turn our head, the area of the video we are pointed at has to update, and the software shows just the small section we need to see from moment to moment as we turn our heads. That little square is defined as the field of view. The field of view is a small part of the complete 360° video frame.Simple math shows that each degree of view corresponds to 10.6667 pixels/degree (1920 pixels/180 degrees = 10.6667 pixels/degree). So multiply 10.6667 x 96 and you get 1024.So the image that we are shown when looking through the headset is 1024 x 1024 pixels (at most), but the size of the display is 1280 x 1280 pixels. There is our first clue to why the video looks soft.
The little piece of video that the software cuts out of the frame is SMALLER than the display resolution. So the software has to stretch the video to map the field-of-view crop to the display resolution. This is done with a relatively low-quality scaler, since the Galaxy phone has to also simultaneously decompress and warp the image to project it on the screen. The result is a little bit of softening. But a 20% scale shouldn’t be that big of a problem.Stereo Makes it WorseAll of the display issues discussed so far are only related to “mono” video—where each eye sees the same image. To increase immersion, stereo display is preferred, where each eye sees an offset image to trick your brain into perceiving depth. On the Gear VR, stereo display can really boost the sense of realism.
A stereo image just looks more lifelike because the offset provides depth cues that help to separate objects in a scene. Some 3D games on the Gear VR can show the virtual environment of the game in stereo, adding to the realism.Each eye should ideally get a full-resolution 360° view. That would require that we double the resolution in one dimension, for example vertically, to have separate images for each eye.If regular UHD video is 3840 x 1920, a frame that is twice as tall would be a giant 3840 x 3840, which is too large for the hardware to support. Instead, we must pack this super-tall video into the smaller 3840 x 1920 frame. The left and right eye share the frame, and each eye gets a 3840 x 960 pixel image that covers the full spherical view horizontally, but must be stretched vertically to cover the full view. A stereo image with top bottom views packed into 3840 x1920 pixels. The field of view is squeezed vertically by 50%.
Image Credit Bob Dass – Flickr.The result of packing two image views into a single frame is a much smaller resolution for each eye. Scaling 20% is not great.
But scaling 150% (512 pixels vertically stretched to 1280 display pixels) is going to result in a big perceived loss of resolution. Whether the format is packed top/bottom or left/right in the frame, you lose half the resolution. Smaller and smaller streamsWhen we look at streaming video, the situation gets much worse. Services like YouTube 360° and others stream video in a lower resolution than 4K because few viewers have the bandwidth to accommodate UHD video. Because the video is being played from a server on the internet and not locally on the device, the services reduce the resolution to maintain a smooth streaming experience. Typically the image is streamed in a 2048 x 1024 frame size. Using the same math above, the field-of-view resolution works out to 540 x 540 pixels for a YouTube size frame.
Streaming HD-resolution 360° video really does result in a resolution comparable to old television (720 x 480 or 720 x 576) and it must be stretched more than 230% to fit the display. That is why streaming stereo VR video looks so soft. Much bigger is betterFor current displays like the Galaxy S6 (or even the forthcoming Oculus Rift), a field-of-view resolution that is slightly larger than the display resolution would help.
Scaling down a slightly larger image will make the image look smoother and will reduce distracting artifacts such as aliasing and noise.A resolution of 1536 x 1536 pixels would be a good solution. This is about 17% bigger than the display, and in our tests it shows a significant improvement in the experience.
Using the math from earlier, if we want to cover a 96° field of view with 1536 pixels, we need a resolution of 16 pixels/degree. Multiply that by 360° x 180°, and you get a resolution of 5760 x 2880.
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So it turns out we need images that are nearly 6000 pixels across to get better coverage for mono video.What about stereo? Remember that for stereo, we ideally want a full resolution image for each eye (or a clever way to pack left and right together). So a rough measure would mean sending video files that are at least 5760 pixels wide by 5760 pixels tall. That works out to 33 megapixels per frame.
Even with next-generation gigabit or 5G wireless networks and better compression, streaming 33-megapixel videos to a headset is going to be a big challenge. The Pixvana SystemAt Pixvana, we think there are other clever ways to solve these resolution and streaming problems. It’s possible to create streams that are closer to HD resolution to allow the viewer to experience VR video at an ideal resolution. Facebook is trying an approach for their own platform that tries to minimize the bandwidth and increase the quality by focusing the quality on the front view with. You can read a bit more on their.We are investigating methods for covering the field of view with greater resolution. One strategy is to cover the current field of view with higher-resolution imagery and add extra padding to account for head motion. Switching between multiple streams as the viewer turns could generate perfect coverage for headsets like the Gear VR (or the PC-tethered systems—HTC Vive, or the Oculus Rift), or even future headsets that will offer much higher display resolution.
A better approach might be to have multiple ways to pack and encode the data based on content. Video shot in a closed studio environment with a fixed camera could have vastly different encoding from a VR video shot from a moving vehicle, for example.intends to build an open system that gives content creators all the tools they need for creating beautiful high-resolution VR video.
Such a system would be responsive to changes in headset position, changes in bandwidth, and headset display characteristics, and still deliver the right image for the viewer at any moment. The Pixvana system will work on a variety of platforms, from mobile to PC.
With our system, future video streamed to the Gear VR will be significantly better than the video we view now, and VR video will achieve the immersion we desire.
A Quick Primer on SupersamplingPerhaps not. Now that PC game developers have become experts at getting their games to run at 60 frames per second even on middling hardware, and even under-$200 graphics cards are getting ridiculously powerful and efficient, a new technique to make games look better has emerged. It’s called “supersampling,” among other names, and the basic gist is that the game renders its graphics at a resolution above what the monitor can displaythen scale it down to your monitor’s native resolution. Various software-only solutions for this have been around for awhile, but now video cards are powerful enough to brute force the technique onto games that don’t natively support it.The benefit is that you “see” graphics at a much higher level of detail, avoiding some basic pitfalls like aliased polygon edges and lighting artifacts. You’re basically using your GPU’s graphical power to render images at a much higher resolution than your eyes can see on the screen, causing various subtle but pleasing enhancements to the way polygonal edges and lighting effects appear.
This can be achieved in other ways with more complex anti-aliasing techniques, but GPUs now have enough juice to dispense with the subtlety and just render things much more sharply behind the scenes. The downside, of course, is that your graphics card has to work harder render super-high-res graphics and then down-sample the image to fit it in your displaywhich can make the game run below 60 frames per second (or whatever your monitor’s refresh rate is), giving you diminishing returns in terms of visual performance.Here’s an Overwatch character being rendered with standard, screen-matching resolution on the left and a 200% super sampling technique on the right. Both are displaying at 1080p, the maximum resolution of many standard monitors.
But the image on the left is being rendered in the game’s engine at 1080p, while the image on the right is rendering at 4K (3840×2160). Note the smoother, less jagged lines at the edge of rendered objects like Lucio’s goggles and the more even transition of shadows and skin tones. And predictably, I observed a significantly lower framerate while the game ran at 200% of its normal resolution, dropping down into the 40s and 30s during complex battle scenes where previously the game ran at a rock-steady 60fps.The results of applying super-sampling techniques can vary from system to system, and even game to game.
The general consensus among the performance-minded enthusiasts who use the technique is that it’s best for older PC games or low-performance console ports, which don’t usually require the full power of your gaming PC and sometimes lack more complex anti-aliasing options. These games can handle 60 frames per second even when over-rendered. It’s also a great tool for taking artistic or interesting screenshots or recording high-quality video, if you’re into that.Here’s a pretty good example of the fine detail that can be added by artificially boosting the resolution, in this case via AMD’s proprietary Virtual Super Resolution.There are two basic ways to achieve this: through your graphics card’s driver program, or through the game itself. Note that only a few games support the latter option at the moment. We recommend trying both if they’re available to you. Option One: Enable Supersampling via the Graphics CardThis method is going to force Windows itself to render images at greater resolution than would normally be possible. NVIDIA Graphics CardsFor NVIDIA GPU owners, open the NVIDIA Control Panel, than click on “Adjust desktop size and position.” Make sure that the “Override the scaling mode set by games and programs” option in section 2 is checked.Now click on “Change resolution” under the “Display” column on the left-hand side.
Click “Customize,” then “Create Custom Resolution.”You want to make a new scaled resolution that’s higher than native, but scales with your monitor’s aspect ratio: 16:9 for most widescreen displays, 16:10 for some rarer “pro” displays, and 4:3 for older LCD and CRT monitors. So for example, if your regular monitor has a 1920×1080 resolution (which is a 16:9 ratio), you can add a new resolution at 2560×1440, or bump it up to a full 4K resolution at 3840×2160—both of which are also 16:9 ratios.Click “test” to see if your monitor will accept the new resolution—some won’t, just displaying a blank screen or error message. If that’s the case, you’re more or less out of luck, and you need to proceed to the game-specific section below.If the test is successful, you’ll now have a new resolution option in Windows’ Display Settings (right-click on the desktop, then click “Display Settings). You can simply set the resolution higher before beginning your game and adjust the rendering resolution as necessary. Note that with the NVIDIA Control Panel, it’s possible to add multiple custom resolutions in Windows.
July 5, 2019 hashmi 0 CommentsMalwarebytes 3.8.3 Crack + License Key 2019 PremiumIntroduction:3.8.3 Crack industry-leading scanner detects and removes malware like worms, Trojans, rootkits, rogues, spyware, and more. All you have to do is launch Malwarebytes Key Anti-Malware and run a scan. It’s that simple.
S letter reinforces my expectation that he'll be able to retain his objectivity.We often post re the increasing quality of Asian-made pianos, but I was struck by his mentioning that computerization has so broadly increased quality that he now sees his role as having changed from critic to guide.And he's absolutely right about the consequence of the current expectation of money for nuthin' and chicks for free.Re: Larry Fine's new book and website are 'live'.08/20/09 12:58 AM 08/20/09 12:58 AMJoined: Jul 2001Posts: 15,502. We often post re the increasing quality of Asian-made pianos, but I was struck by his mentioning that computerization has so broadly increased quality that he now sees his role as having changed from critic to guide.This is similiar to what I heared some say during my recent trip to Germany.They said 'we can't build for the price of Estonias and we'll most definitely never get anywhere near the cost of the Chinese'.' So, let's invent the next generation CNC machinery and sell that to them'If the Chinese are start building better and better pianos, go ahead, blame us - at least we'll make money with something'.Norbert.
GenYoutube is a fast Youtube video downloader service. Now download videos in all formats from Youtube using GenYoutube video downloader.Using GenYoutube you can download any type of videos from the Youtube.Using it you can search the videos also and can play them too before downloading.You can even search the episodes and movies and download them. Search results can the sorted on the basis of relevance, view count, title, rating and publish date.Now you can download songs, movies, episodes, trailers, clips or any Youtube video without visitng the Youtube site with hassle free controls and beautiful responsive UI.Currently It supports 55 formats of video downloads.GenYoutube provides Youtube video downloads in mp4, webm, m4a, 3gp and 3D formats which ranges from mobile friendly to HDTV resolution.It can download Vevo videos, age-restricted videos, region protected videos. It also supports new formats which recently Youtube rolled out.GenYoutube is based on super fast script which can handle a number of downloads simultaneously.
Note: The cheats and tricks listed above may not necessarily work with your copy of the game. This is due to the fact that they generally work with a specific version of the game and after updating it or choosing another language they may (although do not have to) stop working or even malfunction.Extra care should be taken with modifications, trainers, and other things that were not created by the game’s developers. In this case the possibility of malfunctioning or even damaging the game, which may necessitate reinstalling the game, is particularly high.
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Far Cry: New Dawn +15 trainer for PC version 1.0.5 and supports STEAM, UPLAY.
What is a Trainer?A 'Trainer' is a third-party program that is designed to alter memory locations of running programs (games). In order for a Trainer to work, it must be running simultaneously with the game it was written for. It is best to first start the game and actually begin playing, then switch back to Windows (using Alt+Tab) and run the Trainer. Select the desired options and switch back to the game.
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In other cases, you must first run the 'Trainer' then start the game after. Do not CLOSE the Trainer until you are finished playing the game.
Since Trainers are written to alter SPECIFIC memory locations, they usually only work with specific versions of the game. This is the most common problem when Trainers seem to be 'not working'. Most of the time read the 'nfo' or 'txt' file in the 'zip' file before using it.More information and explanations for the type of file you want to download?.
My first question is what is the impact do any of these homeopathic remedies while it literally “waits” to be digested? Advocates of homeopathic remedies are doing in home calculations on dosages based upon human body weights. I saw above that a formula was given to a bird by by determining the bird was 1/130th of your body weight. Did you take into account that your standing heart rate is 80 your bird standing heart rate is 200? Do homeopathic remedies get absorbed more quickly in birds after they pass the crop than in humans?
New BlackBoard™ heat transfer vinyl by Siser®, transforms plain materials into a walking chalkboard – without making you feel like a walking sandwich board! Lightweight and super soft, BlackBoard is unlike any HTV you’ve ever experienced. With a low application temperature and warm peel carrier, this HTV is ideal for heat sensitive.
Over 1,600 people walked through our thematic maze this year.and walked out with candy and a reminder that ‘Jesus blood never fails’We are continually humbled and thankful for all the people that came and those that return each year to see what the theme is and thank us for the impact.we hope you always remember that you are loved by The One who shed His blood for you!?And thank you to those who were rooting and praying for Tadee. She wasn’t doing too well but made it out towards the end. We are grateful for you!??.
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The perfect guide to conversational English—now updated with new exercises, practice dialogues, and FREE mobile access to audio recordings With more than 1 million copies in print, the Practice Makes Perfect series is the world’s go-to resource for learning and mastering languages. If you are an intermediate speaker of English, but want to brush up on your conversation skills, this updated 2rd edition will help you practice your English using the most effective tools available—including new audio exercises you can access FREE via app or online. This premium edition provides a wide range of common phrases, sample sentences, and interactive dialogues that will help you identify the important “markers” in everyday conversations and situations. You can practice your skills using audio exercises you can access on the app or online. In no time at all, you’ll be speaking English fluently, engaging in conversations easily, and expressing yourself with confidence.
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