Recently, I have started to look into image optimisation. Specifically, optimising images for the web.
Using Photoshop, I have come to notice that when you open a new image, the file size could appear around the 45kb whilst in Photoshop, it can appear at over 2mb. That's a big difference.
Furthermore, I can then save the image for the web, where I can reduce the file size by over 75% in Photoshop but when I then look at the file size on my Desktop, the image either has negligible difference or can sometimes appear larger than the original, despite Photoshop indicating that the image has been reduced.
How can all this be? Am I missing something here?