PureView Technology (Optimisation & Evaluation Techniques in Image Processing)

Abstract

PureView Technology is the combination of a super high-resolution image sensor and high-performance optics. It further applies advanced image processing algorithms and pixel oversampling to give the best quality outputs. It uses pixel oversampling method. Pixel oversampling combines many pixels to create a single (super) pixel. When this happens, we keep virtually all the details but filter away visual noise from the image. The speckled, grainy look we tend to get in low-lighting conditions is greatly reduced. One of the major benefits of this technology is loss-less zoom. The level of pixel oversampling is highest when we are not using the zoom. It gradually decreases until we hit maximum zoom, where there is no oversampling. This technique thus allows us to have loss-less zooms even when we are using the camera for taking zoomed in photos. The core of this technology lies somewhere in the satellite imagery system which uses a similar method of pixel oversampling and high-resolution image sensors. With PureView, uses a system called oversampling, which takes the original greater number of megapixels captured with the enormous sensor and reduces them to a high-quality image consisting of only a few megapixels. Pixels are pulled together into groups of seven and those seven pixels are then condensed into one, so that even though the resulting photograph is only a few megapixel images it is of a better quality than those captured with more traditional five megapixel cameras. For example, Nokia Lumia 1020 uses a 41-megapixel camera to take the original image, however, reduces this to only an output of 5 megapixels. This thus produces a very clear picture.

Keywords: PureView, Pixel, Oversampling, Zooming, Interpolation

View PDF