Recovering the incomplete fragments of a JPEG file is a challenge in the digital forensics field

especially in the case of where JPEG header is lost or damaged. In this paper

we present a method to decode and display JPEG file fragments whose header has been lost or damaged and its data doesn't include any restart marker. First

the decoding parameters (Huffman tables

image width

quantization tables

sampling factor)are estimated based on the fragment content; second

corresponding adjustment algorithms for the display problems about mismatched positions and colors are proposed. Experiments show that the proposed method can correctly decode and display the JPEG file fragments without header and RST marker.