Does Sony's "clear zoom" work with non-Sony lenses? Or with the LA-EA2 + A-mount?

Started Mar 29, 2014 | Questions thread
GaryW Veteran Member • Posts: 8,473
Re: Does Sony's "clear zoom" work with non-Sony lenses? Or with the LA-EA2 + A-mount?

Digital Nigel wrote:

captura wrote:

Digital Nigel wrote:


CIZ is not new on Sony cameras, either -- it's been around for several years. But why isn't it just called digital zoom, as that's all it is? Obviously the interpolation is better when the upscaling is less (ie, <4:1 pixels), but it's just a modified upscaling algorithm. What I don't understand is why people who use CIZ don't just use smaller JPEG sizes, with smart zooming? That way, you don't get the damaging fake interpolated pixels added.

When you're not zooming, won't it still be small?  More settings to switch out. It's too bad that the digital zooming can't do this automatically.

Because they're no the same thing.
I refer you to this brief explanation from Sony:

"Below are the definitions of optical zoom, clear image digital zoom and Precision Digital zoom. In short for the best image quality Clear Image digital zoom has a database of patterns it can refer back to and create new pixels for a better quality image than Precision Digital zoom which is basically just crops in.

Optical zoom: true zoom, by using optical zoom quality remains the same and the full resolution of the camera can be used on the zoomed image.

Clear Image Digital Zoom: the processor compares patterns found in adjacent pixels and creates new pixels to match selected patterns, resulting in more realistic, higher quality images

And how, exactly is that different to bicubic resampling ("With bicubic resampling, first the coordinate of each pixel in the output map is determined; then the values of 16 surrounding pixels of the input map are used to calculate an interpolated value for each pixel in the output map”)?

Bicubic applies a formula, while CIZ pattern matches. You can read the difference in the blurbs above. We aren't going to find out details as it's proprietary.  Perhaps it uses even more pixels to establish a pattern. Who knows?

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Gary W.

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