ICER is a wavelet-based image compression file format used by the NASA Mars Rovers. ICER has both lossy and lossless compression modes. NASA Logo Listen to this article · (info) This audio file was created from the revision dated 2005-09-01, and does not reflect subsequent edits to the article. ... A Mars Rover is an unmanned land vehicle for exploration of the planet Mars. ... Lossless data compression is a class of data compression algorithms that allow the original data to be reconstructed exactly from the compressed data. ...

The Mars Exploration Rovers “Spirit” (MER-A) and “Opportunity” (MER-B) both used ICER. Onboard image compression is used extensively to make best use of the downlink resources. Amongst the findings from the Opportunity rover is the presence of hematite on Mars in the form of small spheres on the Meridiani Planum. ... MER-A (Spirit) is the first of the two Mars Exploration Rover Missions. ... MER-B (Opportunity) is the second of the two rovers of NASAs Mars Exploration Rover Mission. ...

Most of the MER images were compressed with the ICER image compression software. The remaining MER images that were compressed made use of modified Low Complexity Lossless Compression (LOCO) software, a lossless submode of ICER.

ICER is a wavelet-based image compressor that allows for a graceful trade-off between the amount of compression (expressed in terms of compressed data volume in bits/pixel) and the resulting degradation in image quality (distortion). ICER has some similarities to JPEG2000, with respect to select wavelet operations. This article is about the unit of information. ... A pixel (pix, 1932 abbreviation of pictures, coined by Variety headline writers + element) is one of the many tiny dots that make up the representation of a picture in a computers memory. ... JPEG 2000 is a wavelet-based image compression standard. ...

The development of ICER was driven by the desire to achieve high compression performance while meeting the specialized needs of deep space applications. Outer space (also called just space), as a name for a region, refers to the relatively empty parts of the Universe, outside the atmospheres of celestial bodies. ...