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À̹ÌÁö :: metadata :: jpeg :: structures´Â JPEG ÆÄÀÏÀÇ ±¸Á¶¸¦ ¼³¸íÇÏ´Â Perl ¸ðµâÀÔ´Ï´Ù.
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À̹ÌÁö :: ¸ÞŸ µ¥ÀÌÅÍ :: JPEG :: ±¸Á¶¹° ¼øÀ§ ¹× ¿ä¾à

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  • °Ô½ÃÀÚ À̸§:
  • Stefano Bettelli
  • °Ô½ÃÀÚ À¥»çÀÌÆ®:
  • http://search.cpan.org/~bettelli/Image-MetaData-JPEG-0.15/lib/Image/MetaData/JPEG/MakerNotes.pod

À̹ÌÁö :: ¸ÞŸ µ¥ÀÌÅÍ :: JPEG :: ±¸Á¶¹° ű×


À̹ÌÁö :: ¸ÞŸ µ¥ÀÌÅÍ :: JPEG :: ±¸Á¶¹° ¼³¸í

Image :: metadata :: JPEG :: Structures´Â JPEG ÆÄÀÏÀÇ ±¸Á¶¸¦ ¼³¸íÇÏ´Â Perl ¸ðµâÀÔ´Ï´Ù. Image :: Metadata :: JPEG :: Structures´Â JPEG ÆÄÀÏÀÇ ±¸Á¶¸¦ ¼³¸íÇÏ´Â Perl ¸ðµâÀÔ´Ï´Ù. ¸®´õ°¡ ÀÚ¼¼ÇÑ ³»¿ë°ú ÀÏ¹Ý ¹üÀ§¸¦ ÂüÁ¶ÇϽʽÿÀ. JPEG Picturesthe JPEG (Joint Photographic Experts Group) ISO Ç¥ÁØÀÇ ±¸Á¶´Â ¼Õ½Ç À̹ÌÁö ¾ÐÃà ¸ÞÄ¿´ÏÁòÀº 1990 ³â ÀÌÀü¿¡ °³¹ßµÇ¾úÀ¸¸ç, »ö»ó ¶Ç´Â ±×·¹ÀÌ ½ºÄÉÀÏ »çÁø Çö½ÇÀûÀÎ À̹ÌÁö¸¦ ¾ÐÃàÇϵµ·Ï ¼³°èµÇ¾ú½À´Ï´Ù (¶óÀÎ ¾ÆÆ® µµ¸éÀÌ Àß ÀÛµ¿ÇÏÁö ¾ÊÀ½). JPEG ¸ÞÄ¿´ÏÁòÀº Àΰ£ÀÇ ´«ÀÇ ¾Ë·ÁÁø Á¦ÇÑÀ» ÀÌ¿ëÇϵµ·Ï ¼³°èµÇ¾úÀ¸¸ç, ƯÈ÷ »ö»ó º¯È­°¡ ¹à±âÀÇ º¯È­º¸´Ù Á¤È®ÇÏ°Ô Àνĵȴٴ »ç½ÇÀº "±âÁؼ±"JPEG Çü½ÄÀÌ Æ¯Çã°¡ ¾øÁö¸¸ ÀϺδ ÀÏºÎ¿Í °ü·ÃµÈ ƯÇã°¡ ÀÖ½À´Ï´Ù. ¼±ÅÃÀû ±â´É, Áï »ê¼ú ÄÚµù ¹× °èÃþ Àû ÀúÀå¼ÒÀÔ´Ï´Ù. ÀÌ·¯ÇÑ ÀÌÀ¯·Î ÀÌ·¯ÇÑ ¼±ÅÃÀû ±â´ÉÀº À¥ (ÁÁÀº Á÷¾÷, ƯÇã ÆÒ ...)¿¡¼­ »ç¿ëµÇÁö ¾Ê½À´Ï´Ù. JPEG´Â ƯÁ¤ ÆÄÀÏ Çü½ÄÀÌ ¾Æ´Ñ ¾ÐÃà ¾Ë°í¸®Áò Ŭ·¡½º¿¡¸¸ ÂüÁ¶ÇÕ´Ï´Ù. ÀÓº£µðµå JPEG ½ºÆ®¸²ÀÌÀÖ´Â ÆÄÀÏÀ» »ý¼ºÇÏ·Á¸é ÇØ´ç ÆÄÀÏ Çü½Ä (¹Ý) Ç¥ÁØÀÌ Àû¿ëµÇ°Å³ª °í¾ÈµÇ¾úÀ¸¸ç ÀϺδ Çü½Ä ¼½¼Ç¿¡ ³ª¿­µÇ¾î ÀÖ½À´Ï´Ù. Àß Çü¼ºµÈ JPEG ÆÄÀÏÀÇ ±¸Á¶´Â ´ÙÀ½ ÀÇ»ç »ý»ê ±ÔÄ¢ (´Ü¼øÈ­¸¦ À§Çؼ­, Å×À̺í°ú SOF ¼¼±×¸ÕÆ® °£ÀÇ ÀϺΠÃß°¡ Á¦¾àÀÌ ¹«½ÃµÈ´Ù)¿¡ ÀÇÇØ ±â¼ú µÉ ¼öÀÖ´Ù. JPEG -> (SOI) (MISC) * (À̹ÌÁö)? (EOI) (À̹ÌÁö) (À̹ÌÁö) -> (ºñ´Ü) (ºñ´ÜÇØ.) (°èÃþ) (DHP) (ÇÁ·¹ÀÓ) + ( ÇÁ·¹ÀÓ) -> (misc) * (exp)? (ºñ´Ü) (ºñ´Ü) (ºñ´Ü) -> (SOF) (½ºÄµ) + (SCAN) -> (MISC) * (SOS) (µ¥ÀÌÅÍ ) * (ECS) (DNL)? (µ¥ÀÌÅÍ) -> (ECS) (RST) (MISC) -> (DQT) | (DHT) | (DAC) | (DRI) | (com) | (¾Û) = À̹ÌÁö ½ÃÀÛ (EOI) ) = À̹ÌÁöÀÇ ³¡ (SOF) = ÇÁ·¹ÀÓ Çì´õ ½ÃÀÛ (SOS) = ½ºÄµ Çì´õ ½ÃÀÛ (ECS) = ¿£Æ®·ÎÇÇ ÄÚµå ¼¼±×¸ÕÆ® (Çà µ¥ÀÌÅÍ, ½ÇÁ¦ ¼¼±×¸ÕÆ®°¡ ¾Æ´Ñ) = ¶óÀÎ ¼¼±×¸ÕÆ®ÀÇ ¼ö Á¤ÀÇ (DHP) = Define Hierarchical P ??? ¼¼±×¸ÕÆ® (EXP) = È®Àå ¼¼±×¸ÕÆ® (RST) = Àç½ÃÀÛ ¼¼±×¸ÕÆ® (DQT) = DAC (Huffman Coding Table) = DEFINE »ê¼ú ÄÚµù Å×À̺í (DRI) = DEFINE RESTART °£°Ý (COM) Á¤ÀÇ = ´ñ±Û ¼¼±×¸ÕÆ® (App) = ÀÀ¿ë ÇÁ·Î±×·¥ ¼¼±×¸ÕÆ®ÀÌ ÆÐÅ°Áö´Â JPEG ÆÄÀÏÀÌ ½ÇÁ¦·Î ¿Ã¹Ù¸¥Áö È®ÀÎÇÏÁö ¾Ê½À´Ï´Ù. Looser ±¸¹®À» Çã¿ëÇÏ°í, ¼¼±×¸ÕÆ®¿Í ECS ºí·ÏÀÌ ¿¬¼ÓÀûÀ̾ú½À´Ï´Ù (±âº»ÀûÀ¸·Î À̹ÌÁö¸¦ Ç¥½Ã ÇÒ ÇÊ¿ä°¡ ¾øÀ¸¹Ç·Î). ¸ðµç ¸ÞŸ µ¥ÀÌÅÍ Á¤º¸´Â (com *) ¹× (¾Û) ¼¼±×¸ÕÆ®¿¡ ÁýÁߵǾî (¿¹ : À̹ÌÁö Ä¡¼ö)ÀÇ ÀϺΠ·¹Äڵ忡 ´ëÇÑ ¿¹¿ÜÀÔ´Ï´Ù. ÂüÁ¶ : B <"µðÁöÅÐ ¾ÐÃà ¹× ¿¬¼Ó À½»öÀÇ ÄÚµù : ¿ä±¸ »çÇ× ¹× Áöħ" ccitt Ãßõ t81 1992 ³â ±¹Á¦ Àü½Å ¹× ÀüÈ­ ÀÚ¹®À§¿øȸ Ç¥ÁØ iso iec´Â 10918-1 ¶Ç´Â itu-t Ãßõ t81/>ÀÔ´Ï´Ù. ¶ÇÇÑ : B <"jpeg ½ºÆ¿ »çÁø ¾ÐÃà Ç¥ÁØ" gkwallace 1991 ¼ÒºñÀÚ ÀüÀÚ Á¦Ç°ÀÇ ieee °Å·¡> Àç¹ßÀÎ : ¡¤ Perl ¿ä±¸ »çÇ× : ¡¤ Perl.


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