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Posts Tagged ‘dualcam’

Vivo Xplay6 features 4-axis stabilized 12MP dual-cam

19 Nov

Chinese manufacturer Vivo has unveiled its high-end model Xplay6 and the new device comes with an interesting (at least on paper) dual-camera setup. The main sensor is a 12MP 1/2.55″ Sony IMX362 chip with a 1.4um pixel size. It is coupled with a fast F1.7 aperture lens, four-axis optical image stabilization and a dual-tone LED. Phase detection AF is on board as well and the main sensor is supported by 5MP secondary chip for depth measurement, which will presumably be used to create a ‘fake bokeh’ effect.

The front camera comes with a 16MP sensor and F2 aperture and images can be composed and viewed on a curved 5.46″ QHD AMOLED display. Also included are a fingerprint sensor and a headphone-jack with dedicated amp. Android 6.0 Marshmallow and Vivo’s Funtouch OS 3.0 are powered by a Qualcomm Snapdragon 820 chipset and a whopping  6GB of RAM. 128GB are available for storage and a 4,080 mAh battery should get you easily through the day. 

All the high-end components are wrapped up in a metal body that is available in gold or rose gold. The Xplay6 will become available in China on December 12 for approximately $ 651. No detail on international availability has been released yet. 

Articles: Digital Photography Review (dpreview.com)

 
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No dual-cam? No problem: Patch app for iOS uses neural networks to create fake bokeh images

11 Nov

Most dual-cam equipped smartphones offer a ‘fake bokeh’ feature. Thanks to the slightly offset position of their two lenses, cameras in devices like the Apple iPhone 7 Plus, Huawei P9 or LG G5, can distinguish between objects in the foreground and background of an image. By applying digital blur to the latter they can simulate effects of shallow depth-of-field you would typically achieve with a DSLR and fast lens.

If your phone just has one camera, there are still a few pure software solutions out there to achieve the same effect. The Patch app for iOS is the latest and uses neural networking to identify the foreground subject in an image and isolate it from the background. If the scene is too complex for the algorithms to work automatically, there is also a manual selection tool that can be used to optimize the results. You can paint in areas that should be sharp, and remove areas that should be blurred. A zooming function allows for greater precision in this task. 

Once the selection is finalized users can choose from 5 different blur strengths to generate the desired effect. Patch does not have any particular camera hardware requirements and therefore works with most iOS devices. If you want to try the app you can download a free version that will leave a watermark on your images from the Apple App Store. A $ 1 in-app purchase will get you an upgrade to the watermark-free version.

Articles: Digital Photography Review (dpreview.com)

 
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Xiaomi Redmi Pro quick review: dual-cam on a budget

08 Nov

Xiaomi Redmi Pro quick review: dual-cam on a budget

Dual-cameras are all the hype in 2016 and we have seen several high-end smartphones with the technology being launched in the past months, including the Huawei P9, LG G5 and, most recently, the Apple iPhone 7 Plus. While each device uses the dual-camera technology in different ways, one thing is common to all of those devices: a high price tag.

In the mid-range bracket of the market dual-cameras are still a rarity, but with the Redmi Pro, Chinese manufacturer Xiaomi has recently launched a dual-camera smartphone that is suitable for smaller budgets. The standard version with 3GB RAM and 32GB of internal memory is currently available for approximately $ 300. Not only is the dual-camera unusual at this price point, but its very solid metal body, deca-core chipset and 5.5″ OLED display make the Redmi Pro look and feel like a much more expensive device. 

The dual-camera setup combines a 13MP Sony IMX258 1/3.06″ sensor with a 5MP Samsung depth sensor. The system does does not offer any optical zoom capability, as on the LG G5 or iPhone 7 Plus, nor does it combine the captured image information from both sensors for improved image quality, ala the Huawei P9. Instead, it uses the dual-camera to simulate the bokeh of a fast lens on a large-sensor camera, something we first saw on the HTC One M8.  There is also a dual-tone LED flash and at the front the Xiaomi comes with a 5MP selfie-camera.

Thanks to retailer Gearbest.com that ships Xiaomi devices worldwide, we’ve had the chance to try the Redmi Pro and its dual-camera, shoot a wide range of samples and see how it generally performs as a device for mobile photography.

Key Specifications:

  • 13MP Sony IMX258 1/3.06″ sensor
  • Secondary 5MP Samsung depth sensor
  • F2.0 aperture
  • Dual-tone flash
  • 1080p video
  • 5MP front camera
  • 5.5-inch 1080p OLED display 
  • Mediatek Helio X20 Deca-Core processor
  • 3GB RAM
  • 32GB storage
  • MicroSD support
  • 4050mAh battery
  • USB Type-C port with quick-charging

Camera App

The Redmi Pro’s camera app is intuitively structured and easy to use.

The Redmi Pro’s camera app comes with a pleasantly simple and intuitive design. Above the shutter button you can find the button for switching to video mode. Other controls on the main screen let you activate HDR capture and the dual-cam’s Stereo mode. Swiping up opens the camera mode screen where you can enter Panorama and Manual modes among others. The latter only offers manual ISO and white balance, though. There is no manual control over shutter speed. Swiping down on the main screen opens up a thumbnail preview array of 12 simple filter effects. 

Image Quality

In bright light the Xiaomi Redmi Pro camera captures 13MP images that show very pleasant colors and good exposure in most conditions. For a smartphone in this price category the Redmi deals well with higher contrast scenes, keeping highlight clipping pretty well under control. 

Things don’t look quite as good when you start zooming into the image, though. At the center of the frame, image detail is decent for a mid-range device and luminance noise is kept at bay as well. However, our test sample’s lens shows strong softness on both the right and left edges of the frame, which is quite noticeable when viewing the image at screen size.

ISO 101, 1/834 sec
ISO 103, 1/1273 sec

In low light situations the Redmi Pro uses a maximum ISO setting of 2050 and slowest shutter speed of 1/15 sec, which in combination with the F2.0 aperture, allows for usable exposures even in pretty dark interiors and night scenes. There is no optical image stabilization, so holding the phone steadily when shooting in dim conditions is recommended, but overall camera shake is not too much of an issue. 

As you can see in the samples below, the Redmi Pro is capable of capturing nice exposures and colors, even in pretty dim light. Lens softness aside, detail is pretty good for this type of device at lower ISO levels, but things start falling apart at ISO 800 and above. On the plus side, luminance noise is well-managed and chroma noise is hardly visible, even at the highest sensitivity setting. Overall, the Redmi Pro’s low light images look nice at web and typical social network size, but at larger viewing sizes the smearing of detail and strong lens softness don’t make for a good combination. 

 ISO 155, 1/30 sec
 ISO 405, 1/30 sec
 ISO 841, 1/30 sec
 ISO 1413, 1/15 sec

Dual-camera Stereo Mode

Stereo mode is The Redmi Pro’s feature highlight. Thanks to the secondary depth-sensing camera, the Redmi can distinguish between foreground and background. Applying digital blur to the latter simulates the shallow depth-of-field you can achieve with a DSLR and fast lens. In the camera app you adjust the ‘virtual aperture’ between F0.95 and F5.6 to control the degree of background blur. Alternatively you can change the focus point and the aperture after capture in the gallery app.

As you can see in the samples below, the feature works reasonably well, but under closer scrutiny it becomes obvious that Stereo mode is not too precise at distinguishing the focal plane, and the transition of blur is often too abrupt to look natural. Generally things look better if you choose a smaller aperture setting and make sure there is some distance between the foreground subject and the background. Stereo images are captured in 16:9 format and are 5.3 MP large.

 ISO 434, 1/30 sec, F2.4 virtual aperture
  ISO 101, 1/1445 sec, F2.0 virtual aperture
  ISO 101, 1/896 sec, F3.5 virtual aperture

In addition to refocusing and controlling the background blur you can apply a range of effects to your Stereo images in the gallery app. Again, the foreground/background separation is not too precise, but the modes can be fun to play with. 

 In the gallery app several effects can be applied to Stereo images.
Blackboard effect

Conclusion

In its price bracket the Xiaomi Redmi Pro can score a lot of points with its premium look and materials, a bright and sharp OLED display and very good battery life. The 13MP camera delivers good color and exposure across the ISO range but our test sample suffered from strong lens softness away from the center of the frame.

The dual-camera does not offer the same zooming or image quality improvement functions we have seen on some recent high-end models, but the effects can be fun to play with. Close-up the results of the shallow depth-of-field simulation do look a little artificial but they are good enough for social sharing.

Overall, the Redmi Pro looks like a good choice for those who want a high-end look and feel for little money and want to try out the dual-camera as a bonus. However, if image quality is your number one priority, and you can live without the dual-cam and metal body, the Motorola Moto G Plus might be a good alternative at a similar price point. The 32GB version of the Xiaomi Redmi Pro is currently available at Gearbest.com for $ 299.

What we like:

  • Premium look and feel
  • Very god battery life
  • Bright and sharp OLED display
  • Good exposure and color across the ISO range

What we don’t like:

  • Lens softness
  • No manual control over shutter speed
  • Imprecise background separation in Stereo mode

There are 22 images in our Xiaomi Redmi Pro gallery. Please do not reproduce any of these images on a website or any newsletter / magazine without prior permission (see our copyright page). We make the originals available for private users to download to their own machines for personal examination or printing (in conjunction with this review), we do so in good faith, please don’t abuse it.

Unless otherwise noted images taken with no particular settings at full resolution.

Review sample gallery

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Articles: Digital Photography Review (dpreview.com)

 
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Huawei Mate 9 comes with next generation Leica dual-cam

04 Nov

Huawei has today launched its latest top-end phablet, the Mate 9. The new device features a large 5.9″ LCD IPS display with 1080p resolution and 1500:1 contrast ratio. In the camera department the Mate 9 comes with a new dual-camera that, like its counterpart in the P9, was co-developed with camera manufacturer Leica.

The new version of the Huawei dual-cam boosts resolution of its monochrome sensor to 20MP (up from 12MP in the P9) with a 12MP color chip. Both lenses feature an F2.2 aperture. There is a new 6-axis optical image stabilization system and a 4-in-1 hybrid AF system that combines, contrast detection, phase detection, laser time-of-flight measurements and depth information. 

As before, image data from both sensors is combined to achieve better image results than conventional cameras. Like on the P9, the dual-camera can also simulate the bokeh of a fast lens on a DSLR, but Huawei says the effect has been improved and is now visible in the live-view image. 

In addition the camera features a new hybrid zoom system, which uses image information from the 20MP monochrome sensor for ‘lossless’ digital zooming of the 12MP standard image output. Huawei says that, thanks to improved compression methods, the camera’s 4K video mode creates smaller file sizes without a loss in image quality. The front camera features an 8MP sensor and F1.9 aperture. 

Android 7.0 and Huawei’s EMUI 5.0 launcher are powered by the in-house Kirin 960 CPU, which, according to Huawei, delivers 180% more performance than the predecessor Kirin 950. Huawei also claims the 4000mAh battery is good for 2.5 days of normal use per charge, or 1.7 days of intensive use. An improved version of Huawei’c quick charging system is on board as well. The Huawei Mate 9 with 4GB RAM, 64GB storage and microSD support will be available in mocha, black, white, gold, space grey and silver and cost €699 in Europe (approximately $ 775). 

Huawei also introduced a limited Porsche Design edition of the Mate 9. This luxury device comes with 6GB of RAM, 256GB of internal memory and features a 5.5″ curved 2K AMOLED display. Other specifications are identical to the standard Mate 9. The Porsche Edition will be sold exclusively through Porsche Design Stores and set you back a hefty €1395 ($ 1545).

Related: Huawei P9 Review

Articles: Digital Photography Review (dpreview.com)

 
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iPhone 7 Plus dual-cam only offers stabilization in wide-anlge lens, report says

12 Sep

According to a report by Ming-Chi Kuo of analyst firm KGI that was obtained by MacRumors, the iPhone 7 Plus dual-camera is equipped with optical image stabilization in the 28mm equiv. wide-angle lens, but not in its longer 56mm equiv. lens. In the report, KGI claims that optical image stabilization will likely make it into the tele lens with the next upgrade of the device in 2017 via a ‘voice coil motor’ upgrade:

“Note that for the dual-camera of iPhone 7 Plus, wide-angle CCM is equipped with optical image stabilization (OIS) VCM, while telephoto CCM only comes with general VCM. We believe the focus of the dual-camera upgrade will be equipping telephoto CCM with OIS CCM, so as to significantly enhance optical and digital zoom quality.”

In the same report KGI predicts that for the foreseeable future the dual-camera feature will remain exclusive to the larger iPhone Plus model which is expected to represent 30-40% of all iPhone sales. 

Apple limiting certain camera features to the larger model is not without precedent. In the iPhone 6 and 6s generations only the Plus devices were equipped with optical image stabilization. With the 7th generation this has now trickled down to the standard model and we would expect the same thing to happen with the dual-camera at some point in the future. 

During the launch presentation Apple did not mention a lack of OIS in the tele lens. In practical terms this would mean that, when shooting with the tele module,  the camera has to use higher ISO values in lower light to avoid camera shake. That said, we’ll have to wait for a review model to find what this means for image quality.

Articles: Digital Photography Review (dpreview.com)

 
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LG V20 comes with dual-cam and stereo sound recording

08 Sep

LG has unveiled the V20, a smartphone with a focus on audiovisual performance that is also the first device to come with Google’s Android 7.0 operating system. The latter brings with it the new multi-window mode, a new notification system, improvements to battery management and the in-app search application, which allows for content search from third-party apps. Thanks to LG’s UX 5.0+ launcher the interface looks very similar to the LG G5’s. 

Also pretty much identical to the G5 is the V20’s camera specification. Like its smaller cousin the new model uses a dual-camera setup. A 16MP sensor is combined with a fast F1.8 aperture and optical image stabilization in the main camera, which is joined by an 8MP/F2.4 unstabilized wide-angle module. There is also on-sensor phase detection and laser assistance for AF. In video mode the new device can record up to 4K resolution and comes with Qualcomm’s new Steady Record 2.0 electronic image stabilization which optimizes synchronization between the image and the device’s gyro. At the front there is a 5MP camera with F1.9 aperture.

In addition, thanks to a built-in 32-bit Hi-Fi Quad DAC, the V20 can record high-quality stereo sound with its videos and eliminate background noise. Recorded images and video can be viewed on a 5.7″ Quad HD display that, like on the predecessor V10, features a secondary small display for quick access to apps, notifications and quick settings.

The Android OS is powered by a Snapdragon 820 chipset and 4GB of RAM. 64GB of expandable storage are on board and the 3200 mAh battery is removable. It also supports Quick Charge 3.0 via a USB Type-C connector. All the components are wrapped up in a smooth-surfaced metal body. The LG V20 will first be released in Korea later this month but availability in other regions, including the US, should be announced soon. 

Articles: Digital Photography Review (dpreview.com)

 
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Apple unveils iPhone 7 and dual-cam iPhone 7 Plus

08 Sep

Apple has today unveiled the iPhone 7 and iPhone 7 Plus. As with previous generations, the main differences between the two models are screen size and the camera. The 4.7″ 1334 x 750 pixel Retina display in the iPhone 7 is 25% brighter than before and offers a wider color gamut. As before, it supports 3D touch. The iPhone 7 Plus screen offers the same characteristics but is 5.5″ large and comes with a 1920 x 1080 resolution. 

Like its predecessor, the iPhone 7 comes with a 12MP camera. However, the new model features optical image stabilization and sensor readout is 60% faster than before. At F1.8 the aperture of the six-element lens is wider and the new true-tone flash comes with 4 LEDs for more power output and better color balance. There is also a new flicker-sensor that can detect flickering in ambient light and correct for it at image capture. 

Apple claims the new in-house designed ISP is faster than before and can complete tasks, such as noise reduction, image stacking and exposure control in approximately 25ms. The moving Live Photos are now captured using video image stabilization and the 7th iPhone generation is the first capable of saving Raw data in DNG format. There is also 4K video and both 1080p and 720p slow-motion modes. At the front the pixel count has been increased from 5 to 7MP.

Next to the standard 28mm module is a 56mm tele-lens with its own 12MP sensor

The larger iPhone 7 Plus model’s camera comes with all the iPhone 7 features but adds a second camera module. Next to the standard 28mm module is a 56mm tele-lens with its own 12MP sensor, and this dual cam implementation is predominantly used for zooming. In the camera app you can tap a zoom button to change to the 2x lens, and drag it all the way up to a 10x magnification. After 2x magnification the zoom applies digital magnification, but given the ‘base image’ captured by the tele-lens uses a longer focal length than other smartphone cameras, the quality of digitally zoomed images should be better than normal.

The camera’s second headline feature is a shallow-depth-of-field simulation as we’ve seen it on several other devices before. The mode is automatically activated in the Portrait scene mode. ‘Depth Mode’ will be provided via a software update later this year, so we’ll have to wait a little while to find out if it performs better than the systems we’ve seen so far. 

The home button has been improved and provides haptic feedback for notifications and other events. Additionally, the iPhone 7 models are the first ones to come with stereo speakers which provide twice the volume and a higher dynamic range than the previous generation. The devices are powered by Apple’s new A10 Fusion 64-bit four-core chipset, of which Apple says it is 40% faster than the previous A9 chip. Thanks to a new GPU graphics power has been increased by 50% as well.  

In terms of design, the new models come with a similar basic shape to the previous generation but the antennae are now embedded in the enclosure and therefore almost invisible. The new models are also available in a new high-gloss finish which goes through an anodization process for protection. The body is water and dust resistant in line with the IP67 standard and will be available in jet-black, black (blasted aluminum), gold, silver or rose gold. There will be 32, 128 and 256GB storage options for both new models and pre-ordering starts on September 9. Start of shipping is scheduled for September 16.

The iPhone 7 starts at $ 649 for the 32GB version, for the Plus model you’ll have to invest at least $ 769.

Articles: Digital Photography Review (dpreview.com)

 
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Xiaomi Redmi Pro offers dual-cam and OLED technology at budget price point

28 Jul

Chinese electronics manufacturer Xiaomi has today announced the latest model in its affordable Redmi line of smartphones. Looking at the device’s body materials and specifications it would not look out of place in the company’s flagship Mi series, though. 

In the imaging department the Redmi Pro features a dual-camera setup that combines a 13MP Sony IMX258 1/3.06″ sensor with a 5MP Samsung depth sensor. The dual-cam does not offer any optical zoom capability, like on the LG G5, nor does it combine the captured image information from both sensors for improved image quality, like on the Huawei P9. Instead, it uses the dual-camera to simulate the bokeh of a fast lens on a large-sensor camera, something we first saw on the HTC One M8. Like on the HTC and several other dual-cam devices, you can change the focus point of the image post-capture in the gallery app. 

There is also a dual-tone LED flash and at the front the Xiaomi comes with a 5MP selfie-camera. Images can be viewed and composed on a 5.5″ 1080p OLED display with full NTSC gamut. A fingerprint reader is on board for increased security and all the electronics are provided with power by a beefy 4050mAh battery that supports quick charging via a USB Type-C port.

The components are wrapped up in a gold or silver brushed metal unibody that gives the device a premium look. The Redmi Pro comes comes in several versions that differ in terms of processor power and memory. Pricing starts at approximately $ 225 for the deca-core Helio X20 chipset, 32GB of storage and 3GB RAM and go up to approximately $ 300 for the faster Helio X25 chipset with 128GB storage and 4GB of RAM.

Articles: Digital Photography Review (dpreview.com)

 
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Rumor has it: Galaxy S8 to come with dual-cam, iPhone 7 won’t have one

21 Jun

Another week, another dual-camera rumor. According to Chinese sources the Samsung Galaxy S8, which is expected to launch in early 2017, will come with a UHD screen for better performance with virtual reality applications. That would make it only the second device from a major manufacturer to feature such a high screen resolution, after the Sony Xperia Z5 Premium. The same sources say the S8 will also come with a dual-camera setup that will be made by Samsung subsidiary SEMCO. Apparently, this move is a reaction to the possible inclusion of a dual-camera in at least one version of the upcoming Apple iPhone 7 series, expected to launch in September this year. 

But the plot thickens! If another rumor is to be trusted, there won’t actually be any dual-cam iPhone 7 models this year. It appears an anonymous employee of Apple’s production contractor Foxconn has said that plans for a dual-cam iPhone 7 Plus have been cancelled due to ‘immature technology.’ There is also a possibility that sensor maker Sony would not be able to provide the required number of sensors due to yield issues and production lines that have been damaged by a recent earthquake.

It would certainly be interesting to see Samsung’s and Apple’s take on this new type of camera design but we’ll have to wait at least another few months before we’ll find out what, if anything, they can come up with. In the meantime you can have a closer look at the LG G5 and Huawei P9 which both have dual-cam modules and are available for purchase already.

Articles: Digital Photography Review (dpreview.com)

 
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Dual-cam Duel: Sony and LG Innotek rumored to be competing for Apple orders

28 May

Judging by the number of rumors buzzing around the internet it seems almost certain that at least one version of the upcoming iPhone 7 will come with a dual-camera setup. Word on the street until now has been that in addition to the standard model Apple is planning to offer a premium version of the larger ‘Plus’ model with a dual-cam designed by Linx, an optical engineering company that was bought by Apple last year.

According to new information this might be, at least partly, incorrect. Financial publication Barron’s quotes Citi Research in saying that all 5.5-inch iPhone models coming this fall will have dual-cameras on the back, not just a premium model.

Barron’s also quotes Chris Chan of Asia-based financial services group Nomura:

‘We think Sony may not be able to deliver its full share of dual cameras to Apple due to: (1) lower-than-expected yield, and (2) damage to its production facility from the April earthquake in Kumamoto. As a result, we think LGI will gain majority share of the initial dual camera orders from Apple…’

Looking at the amount of information out in the open there is almost no doubt that whatever the manufacturer of the modules, we’ll have a dual-cam iPhone to play with in September. The question is if the dual-lenses will be used for optical zooming, as on the LG G5, or to enhance image quality and simulate a shallow depth-of-field, as we’ve seen in the Huawei P9.  We’ll only have to wait a few more months to find out…

Articles: Digital Photography Review (dpreview.com)

 
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