The IXUS 175 has a CCD sensor type which is better than most new compact camera digital cameras. Most compact camera digital cameras that were released around the same time as it have a MOS sensor type. CCD sensors produce high quality, low-noise images but consume a lot more power than CMOS sensors. CCD is the most common image sensor type used in digital cameras.
A CCD sensor type is in fact the best sensor type amongst all compact camera digital cameras that are a comparable age to the IXUS 175.
Amongst comparable types of camera the worst sensor type is MOS.
We compared this camera to all the other cameras that have a CCD sensor and we think cheaper digital cameras such as the Sony DSC-W810 ($101.97) is also worth considering.