I have no experience with any image processing/editing tools. I am doing a project which requires me to convert the images(small icon) with background colour(red/blue/white) to transparent for the website.
The goal is to transform the red background to transparent.
- What image editing tool(s) should I consider?
- How to filter that background colour and make it transparent?
The answer is
For Photoshop you need to download Photoshop portable.... Load image e press "w" click in image e suave as png or gif....
If you want a command-line solution, you can use the ImageMagick convert utility:
convert input.png -transparent red output.png
Quick solution without downloading anything is to use online editors that has "Magic Wand Tool".
Paint.net is a free photo-editing tool that allows for transparent backgrounds. There is a simple example on YouTube http://www.youtube.com/watch?v=cdFpS-AvNCE. If you are still on Windows XP SP2 and that's an issue, I would first recommend doing the free service pack upgrade. But if that is not an option there are older versions of Paint.net that you could download and try.
Source: Stackoverflow.com