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MS Paint (jpeg resize) puzzle


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#1 Magic Sam

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Posted 07 March 2015 - 05:20 PM

I downloaded and saved a jpeg image from the internet.  I want to reduce the size.  I opened the file in [Office 2007] Paint and clicked on the resize button.  Then changed the horizontal and vertical percentage boxes from 100 to 50. Then saved again.

 

However when I print it out the result is as if I had increased rather than decreased the percentages.  I must be missing a trick somewhere and would appreciate if someone could clarify what's going on.  Tks.


Edited by Orange Blossom, 08 March 2015 - 12:15 PM.
Moved to more appropriate forum. ~ OB


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#2 Chris Cosgrove

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Posted 08 March 2015 - 07:22 PM

This is a feature that can work in both directions - to increase and reduce the size of an image, it may be you accidentally used increase instead of decrease - easy when working in %ages.

 

I personally prefer to work in pixcels. These are the number of 'dots' wide and high an image is. As an example, a photo comes out of my camera at approx. 4K x 3K pixcels which is what i save them at. But if I want to send one to someone over the internet I will often reduce them to say 1500 x 1100 pixcels unless they need them at full resolution.

 

In the size control box you have the option to work in %ages or pixcels. Click on the pixcel button and you will see the size (width x height) given in pixcels. So long as the box at the bottom - 'Maintain aspect ratio' - is ticked you only need to change one of these values, the other will change automatically to the correct value. Then save the image as the smaller size - add 'small' or 'reduced' to the image name if you are going to keep it in the same folder and want to keep the original, and that's it.

 

Chris Cosgrove



#3 Magic Sam

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Posted 09 March 2015 - 07:26 AM

Thanks for the tips.  All I can remember doing on 2 or 3 occasions was substituting "50" in place of "100" in the percentage boxes and keeping the tick in the maintain aspect ratio box. I didn't use pixcels because of the fear of mixing up resolution with size - only the latter is relevant to this exercise.  I can however try using the pixcels route and see what happens.

 

Must see if I can't get a post-independence avatar like yours.



#4 Chris Cosgrove

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Posted 09 March 2015 - 08:22 PM

I sympathise - the relationship between size and resolution is not entirely straightforward and is complicated by the resolution of the medium you are using for display !

 

For example, my monitor has 1920 x 1080 pixcel display so any image that size or bigger displayed at 'full screen' will appear that size. I use quite a few of my photographs as wallpapers, almost all of them taken with a DSLR which produces images in classic 35mm format - 4 x 3 - and approximately 4000 x 3000 pixcels. I usually process these before using as a wallpaper just to reduce the file size since my screen cannot reproduce a 4k x 3k image fully. I normally reduce the width to 1920 pixcels using PhotoZoom and then crop the image to 1920 x 1080 in a package similar to PhotoShop so as to finish up with an image that fits on my screen without any distortion.

 

However, if I was to print that identical 1920 x 1080 image in a glossy magazine - think Vogue or Scientific American - which print at approximately 600 dpi (dots per inch) the image would come out at about three and a bit by nearly two inches. If, on the other hand, I sold it to our local newspaper - who print at approximately 100 dpi - that image would come out at nineteen by eleven inches !

 

What I was taught years ago, working with B&W 35 mm film was you never throw resolution away. You always keep the original image in the condition in which it started. In digital terms if you want a larger or smaller image, make a copy and play with the copy. Apart from anything else, if you totally mess up the copy you can always go back to the original and make another copy. If you mess up the original - you are *** ( supply appropriate verb of choice !).

 

Chris Cosgrove

 

PS - I've been using the flag for quite a while, certainly from before Alex. Salmond got on the referendum trail.


Edited by Chris Cosgrove, 09 March 2015 - 08:25 PM.
Add PS


#5 Magic Sam

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Posted 10 March 2015 - 04:37 AM

Wow - all I wanted to do was reproduce and resize a Smiley from the internet and print it out on a piece of scrap paper!!!



#6 Chris Cosgrove

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Posted 10 March 2015 - 08:15 PM

You asked !

 

The most important bit is never to modify the original - make a copy and try changing that. If you don't like the change, delete and repeat the process trying different values. And if you want to see what it will look like when printed - to save on these pieces of scrap paper - you can usually find a 'Print pre-view' button somewhere.

 

Chris Cosgrove



#7 Magic Sam

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Posted 11 March 2015 - 07:24 AM

Obvious question: Is MS Paint the best program for opening, viewing and working on jpegs (and tifs and things) or is there a better alternative ? As a free download - it's not worth my while splashing out on specialised proprietary software for such simple tasks.



#8 Phantom010

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Posted 12 March 2015 - 04:25 PM

picresize is a free and simple online alternative. No need to install anything if you only need to do this occasionally.

 

 

N3nPHAh.png


Edited by Phantom010, 12 March 2015 - 04:33 PM.


#9 Magic Sam

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Posted 12 March 2015 - 05:01 PM

Great I'll try that, tks



#10 Chris Cosgrove

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Posted 13 March 2015 - 07:42 PM

A useful web-site Phantom, I've book marked it against possible future need. I agree with your comment about occasional use. I uploaded one of my photos out of curiosity and it did a perfectly good job of re-sizing it but it took quite a while to upload a full size photo. Against that, I do not have a brilliant upload speed.

 

It's certainly a very easy site to use. As I said above, I have PhotoZoom installed so i don't need something like Picresize but I could cheerfully reccommend it to someone.

 

Chris Cosgrove



#11 Phantom010

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Posted 13 March 2015 - 09:33 PM

I normally use Photoshop, but that one doesn't come cheap... :)



#12 PanickyD

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Posted 23 March 2015 - 11:08 PM

IrfanView is my absolute favorite photo viewer and editor. Totally free, fairly powerful, very small file size,and can be downloaded with or without an installer. I keep a copy of it on my flash drive because it runs as an exe with no installation needed. I'm actually surprised no one else has mentioned it for basic and not so basic editing. It's been around for years. Nowhere near the power of Photoshop or GIMP, but those programs are like using a 5 lb. sledgehammer to kill an ant, Everyone I've ever recommended it to is still using to this day.


Edited by PanickyD, 23 March 2015 - 11:09 PM.

After the game, the King and the Pawn go into the same box...


#13 Magic Sam

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Posted 24 March 2015 - 08:54 AM

Funnily enough I have had Irfanview on my home PC for years, but - not doing much "graphical" work myself- I have never thought of it as a resizer.  Just recently I programmed it to be my default viewer for jpegs. Must experiment with resizing also.



#14 Magic Sam

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Posted 27 March 2015 - 07:31 PM

Irfanview has somehow disappeared from my collection of installed programs so I was trying to download the latest version as a substitute.  However no matter what download source I use it comes up as a malicious file and is blocked - by Avast, then Chrome ...  I could override the cautions but in view of the several warnings I am reluctant.  Can anyone advise me what to do? Is this the right forum or should I post somewhere else?



#15 slowlane

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Posted 28 March 2015 - 09:05 AM

I get a clean report after submitting the SnapFiles download to VirusTotal






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