32" or 34" 4K IPS Monitor

Started Jun 17, 2019 | Discussions thread
Bill Heiser
Bill Heiser Contributing Member • Posts: 504
Re: 32" or 34" 4K IPS Monitor

ppage wrote:

Charles2 wrote:

ppage wrote:

I also have some concerns about trying to do noise removal when editing images at 100% on a monitor with the very small pixels found in 4K monitors.

Couldn't you view the image at 200% while you do the noise reduction?

Unfortunately, noise reduction is really about the image pixels. I could view an image at 200% but then I wouldn't be seeing the image pixels; I'd be seeing a representation of them, each image pixel being represented by two or more monitor pixels. And that's more or less what I'm wondering about because pixels are discrete and arranged in a grid format. How is an image pixel represented at 200%? If it's a square of 4 monitor pixels then the image is being viewed at 400%, not 200%. If it's represented by 2 pixels they must be arranged either vertically or horizontally, and that doesn't make sense; if all the pixels were displayed that way the image would be either twice as long or twice as high as when viewed at 100%. So is 1 pixel displayed as a 4x4 square of monitor pixels while one or more other image pixels are not displayed at all? Anyway, whatever the algorithm is, it seems clear that the image at 200% is not a simple and accurate enlargement of the original image.

How would this inaccuracy affect image processing? Maybe hardly at all; I'm just not sure. Much as I would love it if some local vendor had a few 32" monitors on display with Photoshop running so buyers can experiment I can see why that's just not going to happen.

I've learned from experts on this topic (people who do retouching & high end printing for a living) that this same issue with monitor dot pitch also affects sharpening. e.g. its not possible to do critical sharpening on a 4K monitor. The dot pitch is so fine that it makes images appear sharp even if they're not, and you can't see the individual pixels to properly do the sharpening.

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