enlarge images with no loss of quality – is that possible?

Images consist of pixels. If one enlarges images, incurring only large pixels. We explain how to enlarge images and to what extent it works. just a freeware program you need to do so.

enlarge images with no loss of quality - is that possible?

Suppose we have a picture of only 4 pixels. 2 by 2 square pixels. If we magnify the image, then each pixel of the image is zoomed to fit in the new measure. 2 times 2 is, for example, 200 times but 200. On display were only four surfaces. The original four pixels. That would soon be enlarged so that each of them has a side length of 100 pixels. That's the problem when we want to enlarge images.

If we magnify images, we must not only increase pixelsIf we magnify images, we must not only increase pixels

enlarge images: Is that no loss?

Each program that allows us to increase advertiser Pictures in or out, use a reasonably smart algorithm to match the pixels it. The aim of the action to avoid jaggies and move halfway clever lines between different color values. To a certain degree this works reasonably well. If the output image is not too small and the zoom level is not too ambitious.

There are expensive programs that promise an increase in the images on up to 3,000 percent. If this really makes sense is another question times. If we magnify images, choosing 100 percent, the image is twice as large. 1,000 percent is a tenfold increase in output. An image of 100 by 100 pixels would be at 3,000 percent magnification 3,000 times 3,000 pixels in size afterwards so. How much of the original content then probably still? In fact, the result at this zoom level looks more like a faded oil paintings, viewed through thick glasses. You guessed already what is to be represented as &# 8211; but there is no question that you really can magnify images so without any loss of quality.

enlarge images by 500 percent - results wishy-washy ...enlarge images by 500 percent &# 8211; gives wishy-washy ...

enlarge images: clever resampling?

Special tools, as well as programs such as the image viewer IrfanView, offer several different filter functions to an image to zoom in or zoom out. The trick is to calculate by clever distribution of the original image information on the new pixel, the new output image. Instead of turning so a straight line into a collection of square steps, new lines are calculated and the pixels above and below filled with matching color values ​​of the environment. The result can &# 8211; if we magnify images &# 8211; not be perfect. But it's definitely better than a simple 1: 1 transmission of pixels.

SmillaEnlarger can magnify imagesSmillaEnlarger can magnify images

One should perhaps even try out for yourself without spending any money. The freeware tool SmillaEnlarger loads an image and then it can zoom in up to 3,000 percent. It offers 4 different zoom sizes of which sharp or sharp & bring noisy the best results. We can either a fixed target size (in pixels) or specify a percentage. The results are not bad at already relatively large output images and small images nevertheless still acceptable. but in fact they are not much better than a resample with IrfanView. You just can not really expect good pixel blooming without finishing.

14.11.2017

Posted In: software

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