... Previous: Adaptive, Lossless Compression of 2-D Astronomical Images . ... A new method based on simultaneous contouring the image content with subsequent converting of the contours to a compact chained bit-flow, thus providing efficient spatial image compression, is proposed. ... The existing real-time encoding schemes, allowing incremental image compression, like those implemented in CCITT/ITU-T telecommunication coding standards, are usually behind the leading still image compression techniques. ...