In our smartphones, we generally have a digital camera. You might have noticed that whenever you zoom using your smartphones camera, the image quality deteriorates.
The reason is that your smartphone does digital zooming and digital zooming reduces the image quality. Now you may be wondering why it is so?
Why digital zooming reduces image quality?
The quality reduces because the camera actually crops a portion of the image and then, it simply enlarges that cropped image to fill the screen.
Optical Zoom vs. Digital Zoom
You can find optical zooming in camcorders and DSLR like cameras. These cameras have lens that can move in and out while performing a zoom function. That’s why they retain the original image quality. On contrary, in a smart phone, lens can’t move in the same way as they do in cameras like DSLR and camcorders.
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Now to solve this problem Sony may introduce super resolution digital zooming as a new feature in their upcoming smartphones’ cameras.
This feature will let you capture images with high resolution even after performing digital zooming.
Sony filed a patent application for this technology in 2013 and recently USPTO granted the patent to Sony. You can get an access to the patent from here.
Let’s have a look how Sony is performing super resolution digital zooming from multiple images.
How Sony’s Super Resolution Digital Zoom Function Works
The patent hints that Sony is using multiple images to perform the zooming function.
Whenever you will be using the zoom function while clicking a picture from the Sony’s Smartphone camera; the camera will be capturing multiple images.
In next step, these multiple images are overlapped on each other to produce a single image. The overlapping or superimposing of these images is done by a technique called super-resolution.
As a result, the image that you will get after using superimposing multiple images will be having a high-resolution in comparison to any of the images from which it is has been derived.
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