![]() We can clearly observe a progression of the score in the period up to 2013, which approximately corresponds to a sensitivity gain of 1.3EV. (Credit: DXOMARK)īy contrast, smartphone image quality increased by over 4EV. This graph shows the DXOMARK Sensor Score for a set of APS-C cameras overtime. That difference in sensor size is the equivalent of a 4.5EV ( f-stop) deficiency to overcome. Since a typical smartphone sensor might receive less than one-twentieth of the photons of a 35mm full-frame sensor for the same exposure time, it is much more prone to noise. The amount of noise is directly related to the overall amount of light captured in an image (which Guichard describes as the photon flow). Advances in sensor technology quickly began to close the resolution gap with larger cameras, but noise reduction continued to remain an elusive challenge for the smaller-sensor cameras in smartphones. Noise represents the toughest challengeĮarly smartphones suffered in both resolution and noise due to their small sensor size. However, one area that has proven remarkably stubborn in resisting improvement is image noise. They also often have access to additional information about the distance to the primary subject or even a depth map of the entire scene. Smartphone makers can do that because they provide the complete system, including the sensor, optics, and image processing pipeline. (Credit: DxO)Īll of these automatic corrections do require measuring the characteristics of the optic and sensor combinations very precisely. The color fringes in the original images on the left can largely be fixed automatically, as you can see by the corrected images on the right. When we test cameras and sensors at DXOMARK, it requires over 1600 images in a variety of lab and natural environments to get a good measurement of its performance for the most important of these: There are dozens of axes on which image quality can be measured, and hundreds of attributes. If so, is there still a role for digital cameras?īridging the gap: Smartphones caught up by conquering noise.Are today’s smartphones actually better than digital cameras?. ![]()
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