Most JPEG images are produced by digital cameras, which are optimized to preserve as much information as possible in order to allow the image to be edited and post-processed. Most of this information is not visually detectable and unnecessarily increases the size of the file. NXPowerLite uses a number of techniques to reduce the amount of data in JPEG files, resulting in impressive size reduction without discernible loss of quality.
NXPowerLite can reduce the file size of your JPEG photos by more than 50% without resizing them.
We decode and then re-encode JPEGs using more efficient settings. This allows us to substantially reduce the file size without reducing the image resolution and without changing the perceptual quality of the image. The lossy compression approach we use does create slight pixel differences in the before and after file. If you analyze the uncompressed and compressed images with a computer using a threshold algorithm, you can see minor differences — but by eye, they look identical.
Printing optimized images
Image resolution is the main factor when considering how images will print - if the resolution is too low then it negatively affects the print quality. Because NXPowerLite doesn't change the image resolution you can be comfortable that images on your network will still look great when printed.
How it works
Where appropriate, NXPowerLite applies additional JPEG compression to images. The default setting (8) will result in an undetectable loss of quality, even at 100% zoom or when printed.
NXPowerLite uses a number of additional techniques to reduce the amount of data in JPEG files, resulting in impressive size reduction without any discernible loss of quality. These techniques include optimized Huffman coding and Chroma subsampling.
Note: By default JPEG images are not resized as part of the optimization process and EXIF metadata is preserved.