If you must decompress and recompress a JPEG image, using the exact same quality setting each time seems to introduce little or no degradation to the unedited areas of the image.
Ọ bụrụ na ị ghaghị decompress na-akwụghachi ụgwọ oyiyi JPEG, na-ejikwa otu ọnọdụ ọnọdụ ahụ oge ọ bụla yiri ka ọ na-ewebata obere ma ọ bụ enweghị mmebi ọ bụla na mpaghara ndị a na-achọghị na ya.