Reducing the file size of a very large images, without changing the image dimensions

Question

Consider an application handling uploading of potentially very large PNG files.

All uploaded files must be stored to disk for later retrieval. However, the PNG files ca

Answer 1

If you want to modify the image size in ubuntu, you can try "gimp". I have tried couple of image editing apps in ubuntu and this seemed to be the best among them.

HOW TO INSTALL?

-Open terminal

-type: sudo apt-get install gimp-plugin-registry

-give admin password. you need net connection for this.

-Once installed, open the image with GIMP image editor. Then goto: File > Export as > Click on 'Export' button

-You will get a small window, where check box on "Show preview in image window". Once you check this option, you will get to see the current size of the file along with Quality level.

-Adjust the quality level to increase/decrease the file size.

-Once adjusting is done, click on 'Export' button finally to save the file.