how to make a JPEG larger with out loosing the sharpness


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biancehotbabe
from USA
Member for 6 years 50 weeks
GuG-Points: 18

Hi Everyone and anyone

 can some one help me??!!! I have pics that are way to small. They are in a JPEG format. Is there a way to make it larger with out loosing the quality or sharpness? The pics were emailed to me. No way to get it from its original source at this time.

Any help would be greatly appreciated.

 Thanks!!!!

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SleuthWannaBe
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I am Master of my own domain from Somewhere in the Western Hemisphere. :)
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Re: how to make a JPEG larger with out loosing the sharpness
Laoghaire, very informative reply!! I'm going to have to look for genuine fractals. Been itching to edit some old scanned photos prior to enlargements and for other uses. But other than the unsharp mask option for photoshop, didn't know how else to enlarge a scanned photo without sacrificing sharpness too much.
 
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laoghaire
from Ohio
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Re: how to make a JPEG larger with out loosing the sharpness

I use a photoshop plug-in named genuine fractals printpro and I highly recommend it . Keep in mind I am by no means a professional photographer and our notions of clarity in a picture might be very different. But for example if a friend shares a picture with me over the internet whether in a photo album or through an email they generally will have low resolution because a) they don't want to waste room on there memory cards with huge picture files, b) don't want to have long upload/download times due to large photograph files and C)they themselves don't intend to print the photo but only use them on the internet where most people don't display 4x6 let alone larger sized pics.

The above plug in does a very good job of maintaing the same quality image as what you see on the screen if you were to print the photograph as a 4X6. Any larger than that (in my opinion) just depends on each individual picture and its resolution. There is only so much you can do if the file is simply very small and has poor resolution. Even then, though, you will still have a much better enlargement than you would if you simply magnified the photograph.
This plug-in is VERY user friendly and allows you to simply punch in the size height and length you want the photo using pixels,mm,cm, inchs, or %. Then it automatically adjust (I believe by adding and blending additional pixels into the photo) so it can maintain appearance as it is resized.

It also works great for people whose fathers (like mine...lol) tend to take great huge 6Mb billboard size pictures because he doesn't understand how to adjust his camera. Just as easily it will allow you to downsize a file to a reasonable print size without distortion. Also a preview image is shown while you adjust the picture. so you don't have to keep reopening the plug in if you need to adjust like other programs. Hope this helps some.

ThisGirl
I am Not a hater from in my head
Member for 6 years 45 weeks
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Re: how to make a JPEG larger with out loosing the sharpness

laoghaire wrote:

I use a photoshop plug-in named genuine fractals printpro and I highly recommend it . Keep in mind I am by no means a professional photographer and our notions of clarity in a picture might be very different.

This is an excellent plug-in! It's actually an extremely powerful piece of software that was designed for professional photographers. It is user friendly, but if you take the time to learn its features in-depth you can enlarge a low quality file over 1000% and get a high quality print that is good enough to display in any number of venues. For example, you can take a jpeg file that was originally recorded at 72dpi ~6x10" and increase it to 300dpi 11x17" for professional printing and display. I have taken files with those original specs and increased them for print to over 4' wide. (You can really tell it was a low quality file at that point, but the increase in print quality is really amazing.)

The key is to be very careful with the sharpening controls, this is true for any upsizing process. If it is over-sharpened it will look more like a painting, if it is under-sharpened there will still be too many artifacts in the image. The plug-in won't make the resulting file look exactly like a TIFF file that was originally shot at a very high resolution. But when all you have to work with is a small file, this program will do the job and do it better than any other program or process I have found yet.

But, like I said before, if you aren't increasing the file more than 400% of it's original size, you don't need to invest a couple hundred bucks in Genuine Fractals. The same goes for downsizing, especially because girlfriend was made for upsizing not downsizing. girlfriend does a very good job of downsizing, but I have yet to see any real difference between what it does to a file through downsizing and what Photoshop does (and I've run a lot of tests on the differences.)

The biggest benefit that girlfriend offers over PS in upsizing a file at 400% or less (aside from richer tones in the print, especially blacks, but really no one will notice that besides a professional when the two prints are compared side by side--you won't be able to see the difference on screen) is that the sharpening controls are more streamlined and can be done at the same time as the upsizing, which does makes a difference because the upsizing and sharpening should be the very last process done to a file.

Also, what you see in the preview window and what you see on your screen once the file is upsized is not what you will see when the file is printed! The file must be viewed at 100% on screen to be sharpened. Because of this, it will look very different (and worse) than the way it looks printed.

One more thing, the girlfriend plug-in uses a lot of memory. If you're working with a system not necessarily built for graphics or that doesn't have a lot of processing power, it will slow your computer down when it applies the changes to the file. This is especially true the more you are increasing the file. It is a good practice to write down the settings you are applying as you work with the plug-in (they will be different for each file.) In case the plug-in crashes (which it does a lot at very high percentage increases) you already have your settings written down, so when you re-open PS & girlfriend you don't have to start over from the beginning, you can just type the numbers in again.

ThisGirl
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Re: how to make a JPEG larger with out loosing the sharpness

well, it depends. do you have photoshop? there are 3rd party plug-in's made specifically to upsize image files, but they will cost you. i think GIMP has the same features as PS for upsizing, but I'm not sure of that. photoshop has a few features of it's own that can be as good as the plug-in's, the difference is how large you are trying to increase the file size. anything under 400% photoshop can do just as well as the plug-in's (or, good enough that only a prof photographer/processor is going to know the difference.) if you tell me the specs of the photos (resolution, document size, and file size) and what you want to do with them, i can give you a better idea what you can do.

FairyGirl
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Re: how to make a JPEG larger with out loosing the sharpness

I was actually wondering the same thing some days ago. I have photoshop, could you point me in the right direction? I'm not a pro at all and just have to increase the pics a little, not much. Something that wouldn't cost me would be perfect..

ThisGirl
I am Not a hater from in my head
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Re: how to make a JPEG larger with out loosing the sharpness

Just for the record, it is not possible to size a file larger than its original size without losing sharpness. Any process that is done to the file to increase it beyond original size with result in a loss of sharpness. However, some things can be done to the image after increasing its size to give it an appearance of some of the sharpness that was lost. After you upsize the files, you will need to sharpen them.

 

To increase file size 400% or less in Photoshop:

1. Go to Image>Image Size

2. In the dialogue, increase by Pixel Dimensions or Document Size. Whichever one you don't use will automatically adjust itself according to the one you do use. 

3. Check the box at the bottom of the dialogue that says "Resample Image" and  select "BiCubic Smoother

4. Hit "Enter" 

5. You will now need to sharpen the image

 

To decrease file size in Photoshop:

Do the same as above, but at step #3 select "BiCubic Sharper

FairyGirl
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Re: how to make a JPEG larger with out loosing the sharpness

Thank you for the awesome step-by-step instructions.

I now have a stupid question... 

ThisGirl wrote:

5. You will now need to sharpen the image

How do I do that? I looked a bit around in Photoshop but I didn't find the appropriate tool. 

 

 

ThisGirl
I am Not a hater from in my head
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Re: how to make a JPEG larger with out loosing the sharpness
FairyGirl wrote:

How do I do that? I looked a bit around in Photoshop but I didn't find the appropriate tool.

 

it's not a stupid question! there are whole books and thousands of pages and pages on the internet full of opinions on what is the best way to sharpen images.

how you sharpen the image depends on what you want to do with it after it's been upsized and how much you enlarged it. since there are so many variables, why don't you tell me what you want to do with the images. do you want to print them or display them online? (it makes a difference) and how much time do you really feel like devoting to these images?

ThisGirl
I am Not a hater from in my head
Member for 6 years 45 weeks
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Re: how to make a JPEG larger with out loosing the sharpness

if you do want to spend some time on the images and get a decent print, this is a good and trustworthy overview of sharpening in photoshop

http://www.adobe.com/designcenter/photoshop/articles/phscs2at_sharpening.html 

 

but it's still a fairly technical explanation if you don't have a lot of photoshop experience. my best suggestion with sharpening is to spend some time messing around with the controls on a copy of the image so your eyes can get used to seeing what the different controls do.

Almost Evil
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Re: how to make a JPEG larger with out loosing the sharpness

You really can't enlarge a picture without it becoming pixelated.  Its easy to make them smaller, but not bigger. Wish I had better news for you!

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