JPEGsnoop 1.3.0 by Calvin Hass http://www.impulseadventure.com/photo/ ------------------------------------- Filename: [D:\Temp\Large_formation_of_Boeing_B-17Fs_of_the_92nd_Bomb_Group.jpg] Filesize: [141554] Bytes Start Offset: 0x00000000 *** Marker: SOI (xFFD8) *** OFFSET: 0x00000000 *** Marker: APP0 (xFFE0) *** OFFSET: 0x00000002 length = 16 identifier = [JFIF] version = [1.2] density = 300 x 300 DPI (dots per inch) thumbnail = 0 x 0 *** Marker: APP13 (xFFED) *** OFFSET: 0x00000014 length = 2974 Identifier = [Photoshop 3.0] 8BIM: [0x0404] Name(0)=[] Len=[0x006C] IPTC [0x1C02:000] Record Version = [0x0002] IPTC [0x1C02:120] Caption-Abstract = [Large formation of Boeing B-17Fs of the 92nd Bomb Group. (U.S. Air Force photo)] IPTC [0x1C02:105] Headline = [Boeing B-17F] 8BIM: [0x03ED] Name(0)=[] Len=[0x0010] 8BIM: [0x040D] Name(0)=[] Len=[0x0004] 8BIM: [0x0419] Name(0)=[] Len=[0x0004] 8BIM: [0x03F3] Name(0)=[] Len=[0x0009] 8BIM: [0x040A] Name(0)=[] Len=[0x0001] 8BIM: [0x2710] Name(0)=[] Len=[0x000A] 8BIM: [0x03F4] Name(0)=[] Len=[0x0012] 8BIM: [0x03F7] Name(0)=[] Len=[0x001C] 8BIM: [0x0408] Name(0)=[] Len=[0x0010] 8BIM: [0x041E] Name(0)=[] Len=[0x0004] 8BIM: [0x041A] Name(0)=[] Len=[0x007F] 8BIM: [0x0411] Name(0)=[] Len=[0x0001] 8BIM: [0x0414] Name(0)=[] Len=[0x0004] 8BIM: [0x040C] Name(0)=[] Len=[0x0902] 8BIM: [0x0421] Name(0)=[] Len=[0x0055] 8BIM: [0x0406] Name(0)=[] Len=[0x0007] Photoshop Save As Quality = [8] Photoshop Save Format = [Standard] *** Marker: APP14 (xFFEE) *** OFFSET: 0x00000BB4 length = 14 *** Marker: DQT (xFFDB) *** Define a Quantization Table. OFFSET: 0x00000BC4 Table length = 67 ---- Precision=8 bits Destination ID=0 (Luminance) DQT, Row #0: 6 4 7 11 14 17 22 17 DQT, Row #1: 4 5 6 10 14 19 12 12 DQT, Row #2: 7 6 8 14 19 12 12 12 DQT, Row #3: 11 10 14 19 12 12 12 12 DQT, Row #4: 14 14 19 12 12 12 12 12 DQT, Row #5: 17 19 12 12 12 12 12 12 DQT, Row #6: 22 12 12 12 12 12 12 12 DQT, Row #7: 17 12 12 12 12 12 12 12 Approx quality factor = 83.88 (scaling=32.24 variance=430.71) *** Marker: SOF0 (Baseline DCT) (xFFC0) *** OFFSET: 0x00000C09 Frame header length = 11 Precision = 8 Number of Lines = 1425 Samples per Line = 1800 Image Size = 1800 x 1425 Raw Image Orientation = Landscape Number of Img components = 1 Component[1]: ID=0x01, Samp Fac=0x11 (Subsamp 1 x 1), Quant Tbl Sel=0x00 (Lum: Y) *** Marker: DHT (Define Huffman Table) (xFFC4) *** OFFSET: 0x00000C16 Huffman table length = 31 ---- Destination ID = 0 Class = 0 (DC / Lossless Table) Codes of length 01 bits (000 total): Codes of length 02 bits (001 total): 00 Codes of length 03 bits (005 total): 01 02 03 04 05 Codes of length 04 bits (001 total): 06 Codes of length 05 bits (001 total): 07 Codes of length 06 bits (001 total): 08 Codes of length 07 bits (001 total): 09 Codes of length 08 bits (001 total): 0A Codes of length 09 bits (001 total): 0B Codes of length 10 bits (000 total): Codes of length 11 bits (000 total): Codes of length 12 bits (000 total): Codes of length 13 bits (000 total): Codes of length 14 bits (000 total): Codes of length 15 bits (000 total): Codes of length 16 bits (000 total): Total number of codes: 012 *** Marker: DHT (Define Huffman Table) (xFFC4) *** OFFSET: 0x00000C37 Huffman table length = 181 ---- Destination ID = 0 Class = 1 (AC Table) Codes of length 01 bits (000 total): Codes of length 02 bits (002 total): 01 02 Codes of length 03 bits (001 total): 03 Codes of length 04 bits (003 total): 00 04 11 Codes of length 05 bits (003 total): 05 12 21 Codes of length 06 bits (002 total): 31 41 Codes of length 07 bits (004 total): 06 13 51 61 Codes of length 08 bits (003 total): 07 22 71 Codes of length 09 bits (005 total): 14 32 81 91 A1 Codes of length 10 bits (005 total): 08 23 42 B1 C1 Codes of length 11 bits (004 total): 15 52 D1 F0 Codes of length 12 bits (004 total): 24 33 62 72 Codes of length 13 bits (000 total): Codes of length 14 bits (000 total): Codes of length 15 bits (001 total): 82 Codes of length 16 bits (125 total): 09 0A 16 17 18 19 1A 25 26 27 28 29 2A 34 35 36 37 38 39 3A 43 44 45 46 47 48 49 4A 53 54 55 56 57 58 59 5A 63 64 65 66 67 68 69 6A 73 74 75 76 77 78 79 7A 83 84 85 86 87 88 89 8A 92 93 94 95 96 97 98 99 9A A2 A3 A4 A5 A6 A7 A8 A9 AA B2 B3 B4 B5 B6 B7 B8 B9 BA C2 C3 C4 C5 C6 C7 C8 C9 CA D2 D3 D4 D5 D6 D7 D8 D9 DA E1 E2 E3 E4 E5 E6 E7 E8 E9 EA F1 F2 F3 F4 F5 F6 F7 F8 F9 FA Total number of codes: 162 *** Marker: SOS (Start of Scan) (xFFDA) *** OFFSET: 0x00000CEE Scan header length = 8 Number of img components = 1 Component[1]: selector=0x01, table=0x00 Spectral selection = 0 .. 63 Successive approximation = 0x00 *** Decoding SCAN Data *** OFFSET: 0x00000CF8 Scan Decode Mode: No IDCT (DC only) NOTE: Low-resolution DC component shown. Can decode full-res with [Options->Scan Segment->Full IDCT] Scan Data encountered marker 0xFFD9 @ 0x000228F0.0 Compression stats: Compression Ratio: 18.56:1 Bits per pixel: 0.43:1 Huffman code histogram stats: Huffman Table: (Dest ID: 0, Class: DC) # codes of length 01 bits: 0 ( 0%) # codes of length 02 bits: 11216 ( 28%) # codes of length 03 bits: 28797 ( 72%) # codes of length 04 bits: 201 ( 0%) # codes of length 05 bits: 60 ( 0%) # codes of length 06 bits: 1 ( 0%) # codes of length 07 bits: 0 ( 0%) # codes of length 08 bits: 0 ( 0%) # codes of length 09 bits: 0 ( 0%) # codes of length 10 bits: 0 ( 0%) # codes of length 11 bits: 0 ( 0%) # codes of length 12 bits: 0 ( 0%) # codes of length 13 bits: 0 ( 0%) # codes of length 14 bits: 0 ( 0%) # codes of length 15 bits: 0 ( 0%) # codes of length 16 bits: 0 ( 0%) Huffman Table: (Dest ID: 0, Class: AC) # codes of length 01 bits: 0 ( 0%) # codes of length 02 bits: 83494 ( 42%) # codes of length 03 bits: 11437 ( 6%) # codes of length 04 bits: 66641 ( 33%) # codes of length 05 bits: 18471 ( 9%) # codes of length 06 bits: 10727 ( 5%) # codes of length 07 bits: 4763 ( 2%) # codes of length 08 bits: 1616 ( 1%) # codes of length 09 bits: 1419 ( 1%) # codes of length 10 bits: 270 ( 0%) # codes of length 11 bits: 129 ( 0%) # codes of length 12 bits: 45 ( 0%) # codes of length 13 bits: 0 ( 0%) # codes of length 14 bits: 0 ( 0%) # codes of length 15 bits: 4 ( 0%) # codes of length 16 bits: 41 ( 0%) YCC clipping in DC: Y component: [<0= 0] [>255= 0] Cb component: [<0= 0] [>255= 0] Cr component: [<0= 0] [>255= 0] RGB clipping in DC: R component: [<0= 0] [>255= 0] G component: [<0= 0] [>255= 0] B component: [<0= 0] [>255= 0] Brightest Pixel Search: YCC=[ 1014, 0, 0] RGB=[254,254,254] @ MCU[ 73,171] Finished Decoding SCAN Data Number of RESTART markers decoded: 0 Next position in scan buffer: Offset 0x000228EF.7 *** Marker: EOI (End of Image) (xFFD9) *** OFFSET: 0x000228F0 *** Searching Compression Signatures *** Signature: 01DBA012AAD2A61A6F11CC8823812392 Signature (Rotated): 01DBA012AAD2A61A6F11CC8823812392 File Offset: 0 bytes Chroma subsampling: Gray EXIF Make/Model: NONE EXIF Makernotes: NONE EXIF Software: NONE Searching Compression Signatures: (3327 built-in, 0 user(*) ) EXIF.Make / Software EXIF.Model Quality Subsamp Match? ------------------------- ----------------------------------- ---------------- -------------- NOTE: Photoshop IRB detected Based on the analysis of compression characteristics and EXIF metadata: ASSESSMENT: Class 1 - Image is processed/edited Appears to be new signature for Photoshop. If it doesn't appear in list above, PLEASE ADD TO DATABASE with [Tools->Add Camera to DB]