Win an Amazon Fire TV!

We recently took a look at the new Amazon Fire TV box, and now we’re giving one away! Enter the competition using the widget below. The competition lasts for about two weeks and is open to all readers where the Fire TV is available. Good luck! Amazon Fire TV (2017)

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5 Alternative New Browsers to Replace Chrome

Browsers are the windows to the world wide web. Google Chrome rules the roost today, but a few new challengers might fit your needs better. For all its great features, Chrome hogs system memory and drains the battery. But that huge collection of extensions, and exclusive features like Translate and Google Cast, make it hard to give up on. So in case you’re feeling trapped in Chrome, try out one of these. 1. Colibri (Windows, Mac): Distraction-Free Browser Without Tabs The introduction of tabs changed internet browsing back in the day. Colibri wants to go back to those old days....

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Nintendo may make as many as 30 million Switches next year

 Rumors in early October had Nintendo more than doubling production for the highly successful Switch in order to meet what will almost certainly be crushing demand during the holidays. The company may be planning even higher volumes for next year — perhaps as many as 30 million consoles. Read More

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There’s a New South Park Game on Android and iOS

South Park: Phone Destroyer has arrived to destroy your phone. South Park: Phone Destroyer is a new South Park-themed mobile game that is a collectible card game like Hearthstone. But all you really need to know is that South Park fans will love it, while everyone else will find it infantile. Collect Cards to Vanquish ManBearPig South Park: Phone Destroyer is a turn-based RPG which has you building a card collection in order to battle other players. The collectible cards grant you access to different characters from the show, grant you special abilities to use in battle, and help make...

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Best Black Friday Deals NOT Found on Amazon

Thanksgiving approaches faster than a turkey running away from the chopping block. Or that sense of foreboding that goes hand in hand with familial visits. With it comes Black Friday for unbelievable deals. Whether you’re shopping for yourself or holiday shopping for friends and family, these are the best Black Friday deals around. Note: Some of these deals won’t be available until Black Friday begins at 12am EST on November 24, 2017. LG 49-Inch 4K LED UHD Smart TV ($400 at Kohl’s) Image Credit: Kohl’s Kohl’s may not rank among the most well-known electronics retailers like Best Buy. Nevertheless, Kohl’s...

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Get Trading Cards on Steam Without Actually Running the Game

Trading cards on Steam tap into our love of collecting, while also providing a way to trade and make money on the platform’s marketplace. In fact, many gamers idle their eligible Steam games to collect these cards. While some just leave a game open on their computer and wait for time to pass, others take a more methodical approach with idling software. These programs idle your games without the need to open them at all. For many, it’s how you turn game achievements into money. Two major options, IdleMaster and ArchiSteamFarm, will allow you to earn trading cards on Steam without even opening (or...

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Bike-share platform Spin poaches Seattle transit regulator and launches in a dozen new cities

 Spin, one of several bike-sharing companies now vying for dominance in a number of U.S. cities, has a new weapon to wield against its competitors: Kyle Rowe, the architect of Seattle’s permissive and apparently successful bike-share permit system, who is joining the company to work on government partnerships. In addition, Spin is gearing up to launch in a dozen or so new cities. Read More

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Uber “Express Pool” offers the cheapest fare if you’ll walk a little

 Uber’s found a way to shave another 25% or so off the price of a ride. Uber Express Pool asks you to walk up to a few blocks to your pickup and destination before and after the ride in exchange for the cheapest fare out of all of Uber’s options. The feature dynamically generates “smart spots” that are easy to drive to and close to the origin or destination of… Read More

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How to Set Up and Use Your Amazon Echo Show

Amazon’s powerful and handy Alexa can now be both seen and heard. The once voice-only personal assistant has made a move up with the Amazon Echo Show. The headlining feature of the device, currently only available to Amazon Prime members in the U.S., is a 7-inch touchscreen that showcases anything you can imagine including Amazon Video content, music lyrics, video flash briefings, and weather forecasts. While the touchscreen is a new feature, the Echo Show offers all the other great features of any Echo device including room-filling sound, eight microphones, and the ability to be heard from across a crowded...

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Instagram could let you follow hashtags soon

 Instagram is testing a new feature with a small fraction of its user base. As spotted by Pippa Akram and The Next Web, some users can now search for a hashtag and follow this tag in particular. Ok this is new. What does this do @SimonSocialMM @BizPaul @NatalieTFG any ideas? I've followed 2 but can't find what that means!! http://pic.twitter.com/LlCBk4Wmfv — Pippa Akram… Read More
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Logitech Bricks Devices, Offers Free Replacements

Logitech is intentionally bricking Harmony Link devices in March 2018. This means your Harmony Link will “no longer function after this date”. However, after the backlash that followed this announcement, Logitech is offering a Harmony Hub to all Harmony Link owners for free. All hardware manufacturers stop supporting their products eventually. It’s the only way they can operate, or they’ll be forced to support countless products forever. However, when it comes to cloud-based products, ending support can essentially stop these products from working… Logitech Responds to Complaints Earlier this week, it was revealed that Logitech is planning to brick all...

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Fused Video Stabilization on the Pixel 2 and Pixel 2 XL

Posted by Chia-Kai Liang, Senior Staff Software Engineer and Fuhao Shi, Android Camera Team

One of the most important aspects of current smartphones is easily capturing and sharing videos. With the Pixel 2 and Pixel 2 XL smartphones, the videos you capture are smoother and clearer than ever before, thanks to our Fused Stabilization technique based on both optical image stabilization (OIS) and electronic image stabilization (EIS). Fused Video Stabilization delivers highly stable footage with minimal artifacts, and the Pixel 2 is currently rated as the leader in DxO's video ranking (also earning the highest overall rating for a smartphone camera). But how does it work?

A key principle in videography is keeping the camera motion smooth and steady. A stable video is free of the distraction, so the viewer can focus on the subject of interest. But, videos taken with smartphones are subject to many conditions that make taking a high-quality video a significant challenge:

Camera Shake
Most people hold their mobile phones in their hands to record videos - you pull the phone from your pocket, record the video, and the video is ready to share right after recording. However, that means your videos shake as much as your hands do -- and they shake a lot! Moreover, if you are walking or running while recording, the camera motion can make videos almost unwatchable:

Motion Blur
If the camera or the subject moves during exposure, the resulting photo or video will appear blurry. Even if we stabilize the motion in between consecutive frames, the motion blur in each individual frame cannot be easily restored in practice, especially on a mobile device. One typical video artifact due to motion blur is sharpness inconsistency: the video may rapidly alternate between blurry and sharp, which is very distracting even after the video is stabilized:

Rolling Shutter
The CMOS image sensor collects one row of pixels, or “scanline”, at a time, and it takes tens of milliseconds to goes from the top scanline to the bottom. Therefore, anything moving during this period can appear distorted. This is called the rolling shutter distortion. Even if you have a steady hand, the rolling shutter distortion will appear when you move quickly:

A simulated rendering of a video with global (left) and rolling (right) shutter.

Focus Breathing
When there are objects of varying distance in a video, the angle of view can change significantly due to objects “jumping” in and out of the foreground. As result, everything shrinks or expands like the video below, which professionals call “breathing”:

A good stabilization system should address all of these issues: the video should look sharp, the motion should be smooth, and the rolling shutter and focus breathing should be corrected.

Many professionals mount the camera on a mechanical stabilizer to entirely isolate hand motion. These devices actively sense and compensate for the camera’s movement to remove all unwanted motions. However, they are usually expensive and cumbersome; you wouldn’t want to carry one every day. There are also handheld gimbal mounts available for mobile phones. However, they are usually larger than the phone itself, and you have to put the phone on it before start recording. You’d need to do it fast before the interesting moment vanishes.

Optical Image Stabilization (OIS) is the most well-known method for suppression of handshake artifacts. Typically, in mobile camera modules with OIS, the lens is suspended in the middle of the module by a number of springs and electromagnets are used to move the lens within its enclosure. The lens module actively senses and compensates for handshake motion at very high speeds. Because OIS responds to motion rapidly, it can greatly suppress the handshake blur. However, the range of correctable motion is fairly limited (usually around 1-2 degrees), which is not enough to correct the unwanted motions between consecutive video frames, or to correct excessive motion blur during walking. Moveover, OIS cannot correct some kinds of motions, such as in-plane rotation. Sometimes it can even introduce a “jello” artifact:

The video is taken by Pixel 2 with only OIS enabled. You can see the frame center is stabilized, but the boundaries have some jello-like artifacts.

Electronic Image Stabilization (EIS) analyzes the camera motion, filters out the unwanted parts, and synthesizes a new video by transforming each frame. The final stabilization quality depends on the algorithm design and implementation optimization of these stages. In general, software-based EIS is more flexible than OIS so it can correct larger and more kinds of motions. However, EIS has some common limitations. First, to prevent undefined regions in the synthesized frame, it needs to reduce the field of view or resolution. Second, compared to OIS or an external stabilizer, EIS requires more computation, which is a limited resource on mobile phones.

Making a Better Video: Fused Video Stabilization
With Fused Video Stabilization, both OIS and EIS are enabled simultaneously during video recording to address all the issues mentioned above. Our solution has three processing stages as shown in the system diagram below. The first processing stage, motion analysis, extracts the gyroscope signal, the OIS motion, and other properties to estimate the camera motion precisely. Then, the motion filtering stage combines machine learning and signal processing to predict a person’s intention in moving the camera. Finally, in the frame synthesis stage, we model and remove the rolling shutter and focus breathing distortion. With Fused Video Stabilization, the videos from Pixel 2 have less motion blur and look more natural. The solution is efficient enough to run in all video modes, such as 60fps or 4K recording.

Motion Analysis
In the motion analysis stage, we use the phone’s high-speed gyroscope to estimate the rotational component of the hand motion (roll, pitch, and yaw). By sensing the motion at 200 Hz, we have dense motion vectors for each scanline, enough to model the rolling shutter distortion. We also measure lens motions that are not sensed by the gyroscope, including both the focus adjustment (z) and the OIS movement (x and y) at high speed. Because we need high temporal precision to model the rolling shutter effect, we carefully optimize the system to ensure perfect timestamp alignment between the CMOS image sensor, the gyroscope, and the lens motion readouts. A misalignment of merely a few milliseconds can introduce noticeable jittering artifact:

Left: The stabilized video of a “running” motion with a 3ms timing error. Note the occasional jittering. Right: The stabilized video with correct timestamps. The bottom right corner shows the original shaky video.

Motion Filtering
The motion filtering stage takes the real camera motion from motion analysis and creates the stabilized virtual camera motion. Note that we push the incoming frames into a queue to defer the processing. This enables us to lookahead at future camera motions, using machine learning to accurately predict the user’s intention. Lookahead filtering is not feasible for OIS or any mechanical stabilizers, which can only react to previous or present motions. We will discuss more about this below.

Frame Synthesis
At the final stage, we derive how the frame is transformed based on the real and virtual camera motions. To handle the rolling shutter distortion, we use multiple transformations for each frame. We split the the input frame into a mesh and warp each part separately:

Left: The input video with mesh overlay. Right: The warped frame, and the red rectangle is the final stabilized output. Note how the non-rigid warping corrects the rolling shutter distortion.

Lookahead Motion Filtering
One key feature in the Fused Video Stabilization is our new lookahead filtering algorithm. It analyzes future motions to recognize the user-intended motion patterns, and creates a smooth virtual camera motion. The lookahead filtering has multiple stages to incrementally improve the virtual camera motion for each frame. In the first step, a Gaussian filtering is applied on the real camera motions of both past and future to obtain a smoothed camera motion:

Left: The input unstabilized video. Right: The smoothed result after Gaussian filtering.

You’ll notice that it’s still not very stable. To further improve the quality, we trained a model to extract intentional motions from the noisy real camera motions. We then apply additional filters given the predicted motion. For example, if we predict the camera is panning horizontally, we would reject more vertical motions. The result is shown below.

Left: The Gaussian filtered result. Right: Our lookahead result. We predict that the user is panning to the right, and suppress more vertical motions.

In practice, the process above does not guarantee there is no undefined “bad” regions, which can appear when the virtual camera is too stabilized and the warped frame falls outside the original field of view. We predict the likelihood of this issue in the next couple frames and adjust the virtual camera motion to get the final result.

Left: Our lookahead result. The undefined area at the bottom-left are shown in cyan. Right: The final result with the bad region removed.

As we mentioned earlier, even with OIS enabled, sometimes the motions are too large and cause motion blur in a single frame. When EIS is further applied to further smooth the camera motion, the motion blur leads to distracting sharpness variations:

Left: Pixel 2 with OIS only. Right: Pixel 2 with the basic Fused Video Stabilization. Note that sharpness variation around the “Exit” label.

This is a very common problem in EIS solutions. To address this issue, we exploit the “masking” property in the human visual system. Motion blur usually blurs the frame along a specific direction, and if the overall frame motion follows that direction, the human eye will not notice it. Instead, our brain treats the blur as a natural part of the motion, and masks it away from our perception.

With the high-frequency gyroscope and OIS signals, we can accurately estimate the motion blur for each frame. We compute where the camera pointed to at both the beginning and end of exposure, and the movement in-between is the motion blur. After that, we apply a machine learning algorithm (trained on a set of videos with and without motion blur) to map the motion blurs in past and future frames to the amount of real camera motion we want to keep, and blend the weighted real camera motion with the virtual one. As you can see below, with the motion blur masking, the distracting sharpness variation is greatly reduced and the camera motion is still stabilized.

Left: Pixel 2 with the basic Fused Video Stabilization. Right: The full Fused Video Stabilization solution with motion blur masking.

Results
We have seen many amazing videos from Pixel 2 with Fused Video Stabilization. Here are some for you to check out:

The videos are taken by two Pixel 2 phones mounted on a single hand grip. Fused Video Stabilization is disabled in the left one.

The videos are taken by two Pixel 2 phones mounting on a single hand grip. Fused Video Stabilization is disabled in the left one. Note that the videographer jumped together with the subject.

Fused Video Stabilization combines the best of OIS and EIS, shows great results in camera motion smoothing and motion blur reduction, and corrects both rolling shutter and focus breathing. With Fused Video Stabilization on Pixel 2 and Pixel 2 XL, you no longer have to carefully place the phone before recording, hold it firmly over the entire recording session, or carry a gimbal mount everywhere. The recorded video will always be stable, sharp, and ready to share.

Acknowledgements
Fused Video Stabilization is a large-scale effort across multiple teams in Google, including the camera algorithm team, sensor algorithm team, camera hardware team, and sensor hardware team.

Mysterious ‘green line of death’ appears on some iPhone X displays

 It wouldn’t be the launch of a first-generation Apple product without a few hiccups — who can forget Antennagate and Bendgate? — and the iPhone X is no different. A handful of users report that a mysterious and inextinguishable green line has appeared on their device’s display. Read More

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Mysterious ‘green line of death’ appears on some iPhone X displays

 It wouldn’t be the launch of a first-generation Apple product without a few hiccups — who can forget Antennagate and Bendgate? — and the iPhone X is no different. A handful of users report that a mysterious and inextinguishable green line has appeared on their device’s display. Read More

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Is a Free PDF Editor Good Enough? Adobe Acrobat Pro DC vs. PDFescape

Adobe Acrobat Pro DC is the brand’s newest PDF editor. Advertised as an all-encompassing solution, it seems great for heavy-duty PDF users. But it also costs $14.99/month after a free, week-long trial. If you’re an equally cost-conscious and tech-savvy person, you may be wondering about free alternatives. A Free Adobe Acrobat Pro DC Alternative One Adobe alternative that I’ve used in the past is PDFescape. For this post, I’m going to compare PDFescape to Adobe Acrobat Pro DC, just to see if Adobe really is better. PDFescape is available in three versions, including PDFescape Basic. This version is free, and...

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Looking to Do Some Shopping? Here Are Some Great Deals for You

Today, you can get great deals on a waterproof Bluetooth speaker, a carpet cleaner, a TomTom fitness watch, PC gaming accessories, and much more! TomTom Spark 3 Cardio TomTom Spark 3 Cardio + Music, GPS Fitness Watch + Heart Rate Monitor + 3GB Music + Bluetooth Headphones (Black, Small) TomTom Spark 3 Cardio + Music, GPS Fitness Watch + Heart Rate Monitor + 3GB Music + Bluetooth Headphones (Black, Small) Bluetooth Music Player & Wireless Headphones: Included Bluetooth sport headphones have contoured ear hooks, are sweat and waterproof, last for up to 4 hours, and pair with your Spark and...

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Top 10 Most Popular Accounts on Twitter: Should You Follow Them Too?

With hundreds of millions of accounts on Twitter, how do you know which ones are worth following? We’ve shared 20 essential accounts that everyone should follow, but there are so many more. Recently, we looked at the top 10 most-followed Instagram accounts. This time, we’re going to do the same for the most popular Twitter accounts. Let’s find out who the biggest names on Twitter are, and whether they’re worth following. 10. Twitter (@Twitter) Followers: 62.1 million | Following: 169 | Tweets: 6,222 The list begins with Twitter’s own account. Of course, this handles official Twitter business, so its tweets...

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Apple’s iOS App Store adds weekend deals to boost app downloads

 With the introduction of iOS 11, Apple redesigned the App Store with a heavier focus on editorial content, including articles, interviews, how-to’s, lists and other round-ups with app recommendations. Now, it’s adding another feature, as well, called “This Weekend Only.” The new section lists deals that can be found inside apps, as opposed to discounts on downloads of… Read More

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Amazon expands its Influencer Program to include Twitter and Instagram, in addition to YouTube

Amazon is expanding its Influencer Program beyond YouTube to also include Twitter and Instagram, the company announced on Thursday. First launched into beta earlier this spring, the program initially targeted YouTube stars by offering them a way to make money from the products they promoted in their videos through an affiliate-like relationship with Amazon. Many of today’s influencers… Read More
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How Every Operating System Keeps You Safe

Operating systems are responsible for being the go-between for allowing programs to run on your computer. They divide up your computer resources, splitting them up between applications, to let you manipulate the hardware underneath. Put shortly, any machine that can run programs needs one, whether that be macOS, Windows, or Linux. While some operating systems are more secure than others, many modern ones these days do their best to protect themselves from potential problems out of the box. As such, it would be erroneous to say that just because some are known to have more exploits than others that they...

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