One of the problems with a large diversity of image formats is that sometimes you can`t open an image because the format is incompatible with your programs. To get around this conflict the best thing to do is have a tool like SView5, which works as an image converter, among other things.
With SView5 you can convert images in popular formats (BMP, GIF, PNG, JPEG 2000), and also those that are less known (ILBM, RGFX y QRT). Also, SView5 includes the option to resize images as you need.
More advantages? Yes: it offers a large range of effects filters for photos that lets you change the brightness and contrast, change the order of the colours in the RGB (red, green, blue) system, create shading and mosaics, etc.
SView5, for its versatility, is something more than an image converter.