Coque trepied iphone 8 How DXOMARK scores smartphone rear cameras-coque samsung s6 edge de foot-eqkfac

How DXOMARK scores smartphone rear cameras

DXOMARK Camera (previously called DxOMark Mobile) scores and rankings are based on testing every camera using an identical, extensive process that includes shooting nearly 1,500 images and dozens of clips totaling more than two hours of video. The tests take place in both lab and real world situations, using a wide variety of subjects. Our scores rely on purely objective tests for which the results are calculated directly by the test equipment, and on perceptual tests for which we use a sophisticated set of metrics to allow a panel of image experts samsung galaxy j3 coque disney to compare coque samsung galaxie j3 2017 cactus various aspects of image quality that require human judgment. Testing a single mobile device involves a team of several people for a week. Once we have tested the device, we score the Photo and Video quality separately, and then combine them into an Overall score for quick comparison among the cameras housed in different devices.

We test every device in exactly the same way, in identically configured lab setups, using the same test procedures, the same scenes, the same types of image crop rankings, and the same software. This means DXOMARK results are both reliable and repeatable.

DXOMARK smartphone camera reviews, which include scores, sample images, and analyses, are fundamentally different from most camera reviews. Instead of being driven by a reviewer personal experience with and feedback about a camera, they are driven by coque samsung j5 2017 pogba the scores and analyses that come out of our extensive coque portable samsung j3 2016 disney tests. We get a samsung galaxy j5 coque psg lot of questions about our scores, as well as about our testing and review process, so we sharing with you what goes into a DXOMARK Camera (previously DxOMark Mobile) score, as well as the process we use for testing and for writing up the subsequent review.

DXOMARK Overall score

The most frequently cited score for a mobile device camera is the Overall score. It is created when we map the dozen or so sub scores into a number that gives a sense of the device total image quality performance. An overall score is important, since we need to provide some way to rank results and have a simple answer for those not coque samsung j3 2016 donut wishing to investigate further.

This graphic illustrates the overall process of creating a DXOMARK Camera (previously called DXOMARK Mobile) score. The Overall score is created from a combination of the Photo and Video scores. Each of those scores in turn are a function as f (x) a set of attribute sub scores. As an example of what goes into each of these sub scores, we have broken out thesub score for Photo. coque de mickey samsung coque samsung j7 j3 2016 You can see how it is based on tests performed under a variety of lighting conditions, including 20, 300, and 1000 Lux coque victoria secret samsung j5 2016 light levels. For each light level, the tests include both objective and perceptual scores that measure a variety of attributes. Similarly, we broken out coque personnalisable pour samsung galaxy j3 2016 the Exposure sub score as an example of how the Video sub scores are also created from tests that we conduct under a variety of lighting conditions. These sub scores also utilize both objective coque rhinoshield samsung j4 and perceptual tests that measure a variety of attributes, as well as incorporate both static and temporal (changing) scenes.

We weight the various results in a way that most closely matches their importance in real world applications as judged by mainstream users people typically interested in capturing family memories or sports and by those who coque samsung 1 care about image quality above all else (whom we refer to as photo enthusiasts). We work with many different types of smartphone photographers to ensure that both the deconext coque samsung a70 DXOMARK Camera (previously called DxOMark Mobile) Overall score and its sub scores reflect what is important to them in their photography. Following from this, we test results finished images and not technologies. So, for example, autofocus and bokeh performance are tested independent of the method a particular camera uses to accomplish them.

This means that a device with very good overall scores may receive a higher rating than one which has a few excellent strengths and some coque huawei nova noticeable weaknesses. However, every user is different, and each has differing priorities. For that reason, we encourage anyone reading our reviews to dig in past the Overall score into the sub scores and written analysis.

We also get asked how a device Overall score can coque samsung j4 be higher than its sub scores. The Overall score is not a weighted sum of the sub scores. It is a proprietary and confidential mapping of sub scores into a combined score. The Overall score is also not capped at 100. That just happens to be where some of the best devices are currently.

Photo and Video sub scores

To help evaluate how well a smartphone camera will perform in specific use cases, we provide sub scores for both Photo and Video, covering Exposure and Contrast, , , Texture, Noise, , Flash, and Stabilization (for Video). In 2017, we added Photo sub scores for Zoom and Bokeh to reflect the advanced capabilities of many current mobile devices.

Which sub scores are most important to you will depend on the types of photography you do with your mobile device. In many cases, you can learn more about some of the hardware and software coque samsung j3 2016 militaire we use by looking at our Analyzer product website.

Exposure and Contrast

Exposure measures how well the camera properly adjusts to and captures the brightness of the subject and the background. Dynamic range is the ability of the camera to capture detail from the brightest to the darkest portions of a scene.

Conditions challenges: This sub score matters most to those who shoot in difficult lighting conditions (such as backlit scenes), or in conditions with a large variation between light and dark areas (for example, sunlight and shade). Overall, it is coque samsung j3 2016 camion the most important sub score, as it affects all types of photography.

Details: We assess and measure target exposure and contrast under varying light levels and types of lighting. We also calculate the maximum contrast values for each image.

Conditions challenges: As with exposure, good color is important to nearly everyone. In particular, landscape and travel harry potter coque samsung j5 2017 photographs depend on pleasing renderings of scenes and scenery. Pictures of people benefit greatly from good skin tones, too.

We measure color rendering by shooting a combination of industry standard color charts, carefully calibrated custom lab scenes, and outdoor scenes under a variety of conditions. A closed loop system controls coque clapet samsung j3 the lighting to ensure accurate light levels and color temperatures.

Details: As with Exposure and Contrast, we testusing a variety of light levels and types of coque samsung s6 light, but this time with the purpose of measuring how well and how repeatably the camera calculates white balance, and then how accurately it renders colors in the scene. We also measure uniformity of color. We do not penalize cameras for slight differences in color rendering that are deliberately introduced to create a particular look desired by the manufacturer.

Conditions challenges: Anyone who photographs action, whether it is children playing or a sporting event, knows that it can be difficult to get the subject in focus in time to capture the image you want. We measure a camera autofocus accuracy and speed performance in a variety of lighting conditions. The importance of this sub score is directly related to how much activity there is in the photographs you tend to take.

Details: When measuring autofocus performance, the camera needs to be defocused before each shot, and then the exact interval between when the shutter is pressed to when the image is captured has to be recorded accurately, along with the exact shutter time. In addition to our custom coque samsung j5 2017 serpent LED timer, we have created a system that uses an artificial shutter trigger and multiple beams of light to ensure the accuracy of our autofocus measurements.

Texture and Noise

The Texture sub score measures how well the camera can preserve small details, such as those found on object surfaces.