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the LINUX Terminal, I would recommend getting Imagemagick.
I use a Debian sytem (Ubuntu 12.04) which I think is great, and you can download the Imagemagick for free in the software center.
If using the terminal in ubuntu, you can use a combination of keys to open the terminal CTRL ALT and
T to open the terminal, and then enter the command:
sudo apt-get install imagemagick -y
Once installed, I open up the terminal CTRL ALT T and then I go to my home directory by typing cd /home/eugene/ and then I enter ls to see whats in there.
I then pick a photo for example: p.JPG which is a file that I want to sharpen.
Next I type the command (in the terminal):
convert p.JPG -sharpen 0x3 psharper.JPG
The code above is saying to use the program "convert"
which is part of "imagemagick" to take the picture p.JPG
and sharpen it, and the amount of sharpness will be 0x3
It is also going to rename the picture psharper.JPG so that you will have a sharpened version plus your original version still called p.JPG
Along the way, if you want to view some of the pictures in your home directory or wherever you have them, you can use the command for example: eog psharper.JPG
(you will substitute the name of your pic where you see
psharper) and your picture will display. If you do not have eog installed (eye of the knome), then the terminal will prompt you to install it, by entering the command:
sudo apt-get install eog Once you do that, you may be promted to enter the letter Y because it will take a certain amount of space on your hard drive, and then whenever you want to look at a picture anywhere on your computer from the terminal, you can enter: eog whatever.JPG and your pic will display (change whatever to the name of your pic).
Below is a link for a picture of some of the commands mentioned above for clarity. Good Luck!
[please contact me for website address]
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