Overview of the inner world of JPEG

Many file formats supported by ImageConverter Plus use various types of compression to reduce the file size. Some of these compression schemes are considered lossless, because they do not sacrifice image quality for the sake of smaller files. Other compression schemes are considered lossy, meaning that the compression algorithm selectively discards data in order to achieve file sizes otherwise unachievable. JPEG is known to be a method of a lossy compression, but more than that, it can be considered a toolkit of image compression methods that may be altered to fit the needs of the user. When launching ImageConverter Plus and choosing the output image to be of the JPEG format, there are 4 types of compression methods available: baseline, sequential, lossless and progressive. JPEG baseline is set with our software as a default method and provides practically the same image quality as of the original image. There is no reason for not always using it. It is fast, offers good compression with little noticeable image degradation and allows the user to specify the level of image quality.