Thread: 4k screens
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Old 27th June 2015
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Graham_of_Rainham Graham_of_Rainham is offline
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Re: 4k screens

One of the key things to keep in mind; is resolution and aspect ratio matching.

All to often we hear of people being disappointed with the quality of the image, saying it lacks resolution. However when they are shown their image, correctly formatted for the screen, often the difference comes as a surprise.

Taking a sensor with, for ease of example, a resolution of 4000 x 3000 and displaying the image on a screen of 1024 x 768, can mean only one thing.

Re-Sizing... So how do you do yours

Just clicking on the image is all well and good for a preview, but if you are wanting to see the image at its very best, then surely matching the aspect ratio of the image and display is at minimum the first step, unless you don't mind oval wheels on the car, or the bumpers cropped off...

This is much the same as when we took a roll of 35mm into the chemists and they printed them at whatever size was most cost effective, and heads & feet were chopped off willy-nilly.

Being digital and having so much more capability, we can set the camera to match the display format or post process (crop) to get what we want. But still there is that little problem of having way more pixels in our image than we have on the display.

So: What are you going to do with all those "Precious Pixels"

Type "image scaling" or "resize algorithms" into Google and life will never be the same. In much the same way as there is a debate as to which flavour ice cream is the best, the algorithms that can be used to get your image data represented on a display, are also many and varied. However, there is no "One Size Fits All" solution, and you really will need to do some homework and experiment, to find the maths that works best for both the display and the images that you send to it.

Keep in mind: If the "Chunky Monkey" just don't taste right, it may well be that the freezer truck was parked in the sun.

By way of interest The PAGB have standardised on a display resolution of 1400 x 1050 for Digitally Projected Image competitions, which is good news for all us 4/3rds users. However if you shoot in a portrait orientation, the image can still only be 1050 high, so now you have to sacrifice around half of the display capability, just because you like portraiture. But I doubt there are many that rotate their monitors 90 to see the full quality of their images.

Anyway; something to think about, before spending all that money and having to explain it to the other half.


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