A　scheme　for　self-embedding　an　image　into　itself　is　proposed　as　a　means　for　detecting　and　locating　tamper,　and　self-recovering.　The　image　is　divided　into　small　8×8　blocks　and　each　block　is　DCT　transformed.　A　specified　number　of　the　lower　frequency　DCT　coefficients　are　quantized　and　encoded　using　a　fixed　number　of　bits.　The　number　of　coefficients　and　their　bit　lengths　are　carefully　chosen,　according　to　the　statistical　property　of　these　coefficients,　the　resulting　bit-string　for　each　block　satisfies　the　payload　of　each　block　and　has　good　self-recovering　capability.　The　information　about　one　block　B　(the　bit　string)　is　inserted　into　the　LSB　of　another　distant　block,　which　is　separated　from　B　with　an　offset.　We　analyzed　the　method　for　choosing　the　offset.　The　proposed　scheme　is　an　one　way　watermarking　and　secure　algorithm,　and　can　well　resist　possible　forged　attack.