Enlarge an image without losing quality Solved/Closed

Question

Hello,  I would like to know which software to use to enlarge a photo without losing its quality.  Thank you in advance.

picturart · Accepted Answer

Illustrator is made for vector images. Inkscape is a free equivalent. A photo is not in vector format even though it can be converted, but there is only one advantage to doing it: the file format when the image is really heavy (as in advertising printing on highways, to send lighter files to the printer or press). photo = raster (not just bitmap)  More vector information: https://fr.wikipedia.org/wiki/Image_vectorielle More raster (bitmap) information: https://fr.wikipedia.org/wiki/Image_bitmap  To simplify, when you enlarge a raster image, the software invents pixels in gradients between two existing pixels, so if we want to be accurate, there is no loss of quality but an invention of information that did not exist... as a result, the image once enlarged cannot contain additional information like sharpness or resolution, detail... now if we print, instead of seeing pixels (little squares), we will see gradients between the original pixels, so indeed the image will not be of high quality, at least not as much as if the image had been created from the start with the desired resolution, but at least at print, the image will not look like a chess game...  More information here: https://www.commentcamarche.net/faq/5627-agrandir-une-image-de-petite-taille  See examples of software here: https://forums.commentcamarche.net/forum/affich-4145638-augmenter-resolution-sans-diminuer-la-taille#14

sebastien61 · Answer

Hi,  when you enlarge, you inevitably lose quality, that's math. However, you can play with interpolation (how to calculate the new pixels on your larger image). For that, you can use GIMP, freeware that uses trilinear interpolation, really cool ;o)  Good luck!

taz067 · Answer

simply impossible you will always have a loss of quality

vankop · Answer

…additional information: Link…

Damstounet · Answer

Hi,   I also thought it wasn't possible to enlarge an image without distorting it, but I discovered the software "VSO Image Resizer" by chance (https://www.01net.com/telecharger/windows/Multimedia/photo_numerique/fiches/50362.html  Moreover, its operation is super simple: just select the resolution you want (personally, I always choose the largest, it seems better to me...) in the "Profile" category, then select "Resize Original" in the "Action" category, hit "OK", and that's it!   I haven't found any drawbacks, so don't hesitate to recommend it, it’s great!

Anonyme · Answer

In my opinion, you must be talking about bitmap, so you're definitely going to have a loss of quality.  For this kind of thing, it "just takes" vectorizing the image in any software capable of working in vector (Illustrator, Flash, Director, and many others). This will allow you to make a printout at any size (A6, A4, A0, etc).  Otherwise, to enlarge an image without limits and without loss of quality, you need to call in the NCIS, the experts, or any other American series (lol)

mio · Answer

You have PhotoZoom Professional v2.28, it's really not bad, but it's paid.

picturart · Answer

PhotoZoom Professional v2.28 ---> I didn't know it, I just tried it out, after 15 minutes, it doesn't seem any better than enlarging with Gimp or Photoshop... I don't see the point in paying for this when Gimp is free... it only offers the choice to enlarge with lower quality or even the same quality as Gimp or Photoshop... don't waste your time downloading it like I did...

archimboldo · Answer

Yes, it's definitely surprising, but you can enlarge an image using several photos of the same object, each slightly different from the others. It's called super-resolution. There is the photoacute software that does this: http://www.photoacute.com/studio/download.html  Of course, if you only have one image, you can't use this technique.  Check it out on Wikipedia: https://en.wikipedia.org/wiki/Super_resolution

Dordogne · Answer

To enlarge a photo without losing too many pixels, you need software like Adobe Photo, go to the image menu and choose the size of your new photo, but you will still lose pixels, although it remains within a reasonable range.

DJ An · Answer

No loss of quality? Impossible, but you can decrease it without damage, I use Photoshop and Arcsoft Photo Studio. But you must know, it all depends on how your photos are taken and what size you want (x3, x4, or x10). Hope this helps....

Maylou · Answer

Here's another super interesting software that allows you to enlarge images without noticeable loss:  https://www.tunibox.com/lifestyle/photo/agrandir-les-images-sans-perte-de-qualite-avec-imageenlarger.html

coucou · Answer

enlarge angel images for wallpaper

sherred · Answer

even if the original message is old, it can still be useful today  and as I am a photography enthusiast, "before the advent of digital"  we were already talking about enlarging images without loss....  for those who are confident and think they hold the truth... move along  for the others ;)  there are interpolation algorithms that allow you to add "missing" pixels when enlarging a photo  software has evolved tremendously, the results are amazing  of course, it's artificial  but you do take digital photos with your phones, without complaining  do you know that with an old camera "the cube" from 1930, I can take a photo that has an equivalence between 20 and 50 million pixels  lol  and as today everyone thinks that the more pixels there are the better the quality, megapixels are sold  like hundreds of watts for crappy hi-fi systems  it's just commercial  actually, the quality of a photo depends mainly "but not only" on the amount of light   and the more pixels there are, the less light there is per point  plus, very often, the zoom is digital, and there, it's an enlargement without interpolated calculation

ydemers · Answer

You just have to take a photo of your photo in very good quality and scan it at high resolution, then reproduce it full page.

sherred · Answer

a little aside, for all those who are shouting against interpolation programs  you have at home "for all those who follow technology" new LED screens 100, 200, 400, 600, and even 800hz  and well, in reality, it's interpolation  TV programs are at 50 hz, and 100 hz at best  the screen therefore does 50 or 100 hz "at best" the rest results from a clever calculation of interpolated images  and no one complains  lol -- When the limits are crossed, there are no more boundaries What I wrote, I wrote it

alolo33 · Answer

So, I might have a solution. PNG images, I was looking for scalable images for a poster (in a professional context), and my colleague was making "tubes" for images, and she was using PNG images. It's mainly the weight of the photo that will be decisive, 600kb! And I found images of 600kb in PNG format! That means that once enlarged, they will lose some sharpness, but not by much! They don't all weigh that much, but you can find some.

Fatalicious · Answer

Otherwise, there's Paint, it keeps everything perfectly :)

MK7 · Answer

Easy, if you want to enlarge 5 times, enlarge 20 times, blur to remove pixelation, then reduce by 4 times! And there you go!

Enlarge an image without losing quality

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