DxOMark Mobile Report: Nextbit Robin
The Nextbit Robin doesn't look much different than most other smartphones, but its Android operating system and hardware have been optimized to make it the first real cloud phone. When the device is connected to Wi-Fi and plugged into the charger it automatically backs up apps and photos to the cloud. When you start running out of local storage space on the device, files and apps you haven't used in a while are automatically archived. In the camera department the Robin comes with a 13MP sensor, phase detection AF, an F2.2 lens, dual-tone LED flash and 4K video support. You can read more about the Nextbit automatic archiving process and how we got on with its camera in our real-life test in the Nextbit Robin quick review.
In its DxOMark test the Nextbit Robin scores 81 points, currently taking the18th position in the DxOMark Mobile ranking. In still image mode the testers liked the "good detail preservation and fast and generally accurate autofocus". On the downside, "noise is very visible in all conditions", chroma noise levels are high, "white balance is sometimes inaccurate in outdoor conditions, mostly with a blue cast" and high-contrast scenes show little shadow detail and some highlight clipping. The test team also criticized "fringing and demosaicing artifacts and visible ringing".
When shooting video the Robin showed "good autofocus behavior, generally good noise reduction in bright light and good stabilization in bright light conditions". However, testers also found a "loss of detail in low light, and occasional oscillations with exposure adaptation." Some clips also showed "tremors and jitter artifacts".
Color, Exposure and Contrast
The DxOMark team found the Nextbit Robin images to be "mostly well exposed" but also criticized "visible color shading in all conditions, sometimes inaccurate white balance in outdoor conditions" and highlight and shadow clipping in high-contrast scenes.
Overall DxOMark awarded the Nextbit Robin scores of:
- 4.4 out of 5 for Exposure
- 4.1 out of 5 for White Balance accuracy
- 3.1 out of 5 for Color shading in low light*
- 4.2 out of 5 for Color shading in bright light*
- 3.0 out of 5 for Color Rendering in low light
- 4.5 out of 5 for Color Rendering in bright light
*Color Shading is the nasty habit cellphone cameras have of rendering different areas of the frame with different color shifts, resulting in pictures with, for example, pinkish centers and greenish corners.
Noise and Details
DxOMark's engineers reported that the Nextbit Robin images show well preserved detail in all conditions and that "low light noise has a fine grain". On the downside, "outdoor noise has a large grain, chromatic noise is very visible and luminance noise very noticeable in low light".
Texture acutance is a way of measuring the ability of a camera to capture images that preserve fine details, particularly the kind of low contrast detail (such as fine foliage, hair or fur) that can be blurred away by noise reduction or obliterated by excessive sharpening.
Sharpness is an important part of the quality of an image, but while it's easy to look at an image and decide visually whether it's sharp or not, the objective measurement of sharpness is less straightforward.
An image can be defined as 'sharp' if edges are sharp and if fine details are visible. In-camera processing means that it's possible to have one of these (sharp edges) but not the other (fine details). Conventional MTF measurements tell us how sharp an edge is, but have drawbacks when it comes to measuring fine detail preservation. Image processing algorithms can detect edges and enhance their sharpness, but they can also find homogeneous areas and smooth them out to reduce noise.
Texture acutance, on the other hand, can qualify sharpness in terms of preservation of fine details, without being fooled by edge enhancement algorithms.
At first sight, the images from these two cameras may appear equally sharp. A sharpness measurement on edges will indeed confirm this impression, and will even show that the second camera is sharper. But a closer examination of low contrasted textures shows that the first camera has better preservation of fine details than the second. The purpose of the texture acutance measurement is to qualify this difference.
Visual noise is a value designed to assess the noise in an image as perceived by the human visual system, depending on the viewing condition (size of image, size of screen or print, viewing distance). The measurements have no units and can be simply viewed as the weighted average of noise standard deviation for each channel in the CIE L*a*b* color space. The lower the measurement, the less noise in the image.
Noise and Detail Perceptual scoring
- Texture (bright light): 4.8 out of 5
- Texture (low light): 3.8 out of 5
- Noise (bright light): 3.6 out of 5
- Noise (low light) 3.1 out of 5
Phone cameras, like entry-level compact cameras, tend to suffer from artifacts such as sharpening halos, color fringing, vignetting (shading) and distortion, which can have an impact on the visual appeal of the end result. DxOMark engineers measure and analyze a range of artifacts. Their findings after testing the Nextbit Robin are shown below:
- Fringing and demosaicing artifacts are very visible
- Visible ringing
- Color artifacts
- Sharpness 4.4 out of 5
- Color fringing 3.2 out of 5
- Ringing center 16.3%
- Ringing corner 10.1%
- Max geometric distortion -0.3%
- Luminance shading 7.1%
Distortion and Chromatic Aberrations
DxOMark also tests autofocus accuracy and reliability by measuring how much the acutance - or sharpness - varies with each shot over a series of 30 exposures (defocusing then using the autofocus for each one). As with other tests these results are dependent on the viewing conditions (a little bit out of focus matters a lot less with a small web image than a full 8MP shot viewed at 100%). Using the 8MP equivalent setting, the Nextbit Robin performs well in all light conditions. The overall score is 96/100 in bright light and 83/100 in low light.
- Fast and generally accurate autofocus
- Occasional failure in bright light triggered mode
- Some irregularities in low light
The Nextbit Robin edge offers a dual-LED flash for illumination in very low light. DxOMark scored the camera a 80/100 overall for its flash performance.
- Flash images are well exposed
- Accurate white balance
- Noise is visible in areas of plain color
- Slight autofocus and exposure irregularities
Overall DxOMark Mobile Score for Photo: 82 / 100
DxOMark engineers put phone cameras through a similarly grueling set of video tests, and you can read their full findings on the DxOMark website here. Overall, DxOMark found the Nextbit Robin's video mode to perform very well, with fast autofocus, efficient stabilization and good color. On the downside, some noise is visible, especially in low light.
- Good autofocus behavior
- Generally good noise reduction in bright light
- Good stabilization in bright light conditions .
- Loss of detail in low light conditions
- Occasional oscillations during exposure adjustment
- Tremors and jitter artifacts
Overall DxOMark Mobile Score for Video: 78 / 100
DXOMark Image Quality Assessment
With a DxOMark Mobile score of 81 the Nextbit Robin takes the 18th place in the DxOMark smartphone rankings. The test team liked the accurate AF and good detail in all light conditions but weren't too happy with high levels of both luminance and chroma noise. They also criticized the sometimes unreliable white balance in daylight, limited dynamic range and several types of image artifacts, such as fringing, ringing and moiré.
In video mode the Robin's AF works reliably and footage shows efficient noise reduction and stabilization in bright light. On the downside, detail decreases noticeably in low light and some clips show jitter artifacts and abrupt exposure changes. For a more detailed analysis, visit www.dxomark.com.
Feb 20, 2016
Jun 20, 2017
Jun 23, 2017
Jun 21, 2017
|Smile by Olymguy|
from Ultra Asian Indian Female Faces
|Space Shuttle Cockpit- by vbuhay|
from Aircraft Control Stick
The 3D VR camera launched through a crowdfunding campaign in 2015 goes on sale beginning June 26.
Noctilucent clouds, a crescent moon and Venus were visible in the pre-dawn sky over Budapest yesterday. Photographer György Soponyai captured NASA's astronomy picture of the day.
Squirming pets won't sit still for photos? A Kickstarter campaign is looking to help.
Find out how Chris Burkard shifted from editorial photography to his true passions: landscapes, conservation and, of course, surfing.
The updated EyeEm app scans your camera roll and picks images that are composed particularly well, have the best quality, or highest chance of selling on EyeEm Market.
It's three years old but still a solid option for a Micro Four Thirds shooter looking for a high-quality, fast, wide-angle prime. Take a look at how we got along with it.
Tamron has announced the longest all-in-one zoom lens currently available, the 18-400mm F3.5-6.3 Di II VC HLD. Designed for Canon and Nikon crop-sensor cameras, the lens will be available in July.
When you're ready to step-up to full-frame from an entry-level or midrange camera, the choices can be overwhelming. Find out which models came out on top in our $1200-2000 enthusiast ILC roundup.
Just a guy wearing a VR headset, smashing invisible Goombas in Central Park.
NASA's Mars Reconnaissance Orbiter captured this gorgeous aerial photo of the Martian landscape. And if you look really close, you can actually see the Mars Curiosity rover in the very middle.
The city of Laguna Beach, California has provided some clarification around the kinds of photography permits it offers.
Later this year, a VR180 camera will be Joining Yi's Halo and 360 VR cameras, which will offer stereo 3D capture, yet be as easy to use and compact as a 2D camera.
Caltech researchers have developed an 'optical phased array' chip that uses time delays instead of a lens to focus the incoming light.
Pricing and shipping have finally been revealed for two highly anticipated lenses from Sigma, announced in February.
These macro photos of clouds of paint billowing through clear water might look like high-quality CGI, but they're real photographs. And photographer Alberto Seveso told us how they were made.
Facebook is testing a feature that prevents people from saving, sharing, or even taking a screenshot of your profile picture.
We've reshot the Sony a9 in our studio. The short story: it's sharper! The long story... well you can read it all here.
The collection will be officially launched during the Europeana Transcribathon Campus Berlin 2017 crowdsourcing event which will be held on 22 and 23 June at the Berlin State Library.
Light gives us some insight into the preparations for the launch of the pre-order shipments of its much anticipated L16 multi-lens camera.
OnePlus co-founder Carl Pei has confirmed in a tweet that the second lens on the back of the OnePlus 5 uses a 1.6x optical zoom and that digital zoom is used to reach the claimed 2x zoom factor.
Fujifilm recently unveiled the second in its series of affordable cine lenses, the MK50-135mm T2.9. We got our hands on it for a couple days and took it for a spin.
Leica's first attempt at an M-series digital rangefinder was rough around the edges, but set a pattern for all of the cameras that came after it. In this week's Throwback Thursday article, Barney remembers the M8.
No stranger to extreme situations, legendary climber and filmmaker Jimmy Chin talks to Outside Magazine about his career, and the challenge of filming Alex Honnold's rope-free solo climb of El Capitain.
A company backed by Android co-founder Andy Rubin is attempting to make video conferencing less terrible.
Rangefinder magazine asked five professional portrait and wedding photographers about posting on Instagram; no surprise, they got five different answers.
This captivating stop motion film was created by stripping away one layer of wood at a time. It's hard to look away.
It will enable users to simulate the presence of the sun, moon and Milky Way and see how they interact with an area's topography.
Since its introduction in November last year Instagram's live streaming feature has been used by millions, but videos could not be archived for watching at a later stage. A new update has now added the capability.
CopyTrack's study also found that the second most-stolen image is a woman wearing painted jeans. That's apparently a thing.
Forget expensive lenses with fancy coatings and special lens elements – photographer Robin de Puy took these portraits using just a water drop for a lens.