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  1.  
  2. JPEGsnoop 1.8.0 by Calvin Hass
  3. http://www.impulseadventure.com/photo/
  4. -------------------------------------
  5.  
  6. Filename: [Z:\home\kiruha\Yandex.Disk\shad\shad-cpp\jpeg-decoder\tests\save_for_web.jpg]
  7. Filesize: [275000] Bytes
  8.  
  9. Start Offset: 0x00000000
  10. *** Marker: SOI (xFFD8) ***
  11. OFFSET: 0x00000000
  12.  
  13. *** Marker: APP1 (xFFE1) ***
  14. OFFSET: 0x00000002
  15. Length = 24
  16. Identifier = [Exif]
  17. Identifier TIFF = 0x[49492A00 08000000]
  18. Endian = Intel (little)
  19. TAG Mark x002A = 0x002A
  20.  
  21. EXIF IFD0 @ Absolute 0x00000014
  22. Dir Length = 0x0000
  23. Offset to Next IFD = 0x00000000
  24.  
  25. *** Marker: APP12 (xFFEC) ***
  26. OFFSET: 0x0000001C
  27. Length = 17
  28. Identifier = [Ducky]
  29. Photoshop Save For Web Quality = [100]
  30.  
  31. *** Marker: APP14 (xFFEE) ***
  32. OFFSET: 0x0000002F
  33. Length = 14
  34. DCTEncodeVersion = 100
  35. APP14Flags0 = 49152
  36. APP14Flags1 = 0
  37. ColorTransform = 1 [YCbCr]
  38.  
  39. *** Marker: DQT (xFFDB) ***
  40. Define a Quantization Table.
  41. OFFSET: 0x0000003F
  42. Table length = 132
  43. ----
  44. Precision=8 bits
  45. Destination ID=0 (Luminance)
  46. DQT, Row #0: 1 1 1 1 1 1 1 1
  47. DQT, Row #1: 1 1 1 1 1 1 1 1
  48. DQT, Row #2: 1 1 1 1 1 1 1 2
  49. DQT, Row #3: 1 1 1 1 1 1 2 2
  50. DQT, Row #4: 1 1 1 1 1 2 2 3
  51. DQT, Row #5: 1 1 1 1 2 2 3 3
  52. DQT, Row #6: 1 1 1 2 2 3 3 3
  53. DQT, Row #7: 1 1 2 2 3 3 3 3
  54. Approx quality factor = 98.25 (scaling=3.50 variance=4.81)
  55. ----
  56. Precision=8 bits
  57. Destination ID=1 (Chrominance)
  58. DQT, Row #0: 1 1 1 2 2 3 3 3
  59. DQT, Row #1: 1 1 1 2 3 3 3 3
  60. DQT, Row #2: 1 1 1 3 3 3 3 3
  61. DQT, Row #3: 2 2 3 3 3 3 3 3
  62. DQT, Row #4: 2 3 3 3 3 3 3 3
  63. DQT, Row #5: 3 3 3 3 3 3 3 3
  64. DQT, Row #6: 3 3 3 3 3 3 3 3
  65. DQT, Row #7: 3 3 3 3 3 3 3 3
  66. Approx quality factor = 98.39 (scaling=3.23 variance=0.50)
  67.  
  68. *** Marker: SOF0 (Baseline DCT) (xFFC0) ***
  69. OFFSET: 0x000000C5
  70. Frame header length = 17
  71. Precision = 8
  72. Number of Lines = 425
  73. Samples per Line = 699
  74. Image Size = 699 x 425
  75. Raw Image Orientation = Landscape
  76. Number of Img components = 3
  77. Component[1]: ID=0x01, Samp Fac=0x11 (Subsamp 1 x 1), Quant Tbl Sel=0x00 (Lum: Y)
  78. Component[2]: ID=0x02, Samp Fac=0x11 (Subsamp 1 x 1), Quant Tbl Sel=0x01 (Chrom: Cb)
  79. Component[3]: ID=0x03, Samp Fac=0x11 (Subsamp 1 x 1), Quant Tbl Sel=0x01 (Chrom: Cr)
  80.  
  81. *** Marker: DHT (Define Huffman Table) (xFFC4) ***
  82. OFFSET: 0x000000D8
  83. Huffman table length = 221
  84. ----
  85. Destination ID = 0
  86. Class = 0 (DC / Lossless Table)
  87. Codes of length 01 bits (000 total):
  88. Codes of length 02 bits (002 total): 05 06
  89. Codes of length 03 bits (003 total): 04 07 08
  90. Codes of length 04 bits (001 total): 03
  91. Codes of length 05 bits (001 total): 02
  92. Codes of length 06 bits (001 total): 09
  93. Codes of length 07 bits (001 total): 01
  94. Codes of length 08 bits (001 total): 00
  95. Codes of length 09 bits (001 total): 0A
  96. Codes of length 10 bits (000 total):
  97. Codes of length 11 bits (000 total):
  98. Codes of length 12 bits (000 total):
  99. Codes of length 13 bits (000 total):
  100. Codes of length 14 bits (000 total):
  101. Codes of length 15 bits (000 total):
  102. Codes of length 16 bits (000 total):
  103. Total number of codes: 011
  104.  
  105. ----
  106. Destination ID = 1
  107. Class = 0 (DC / Lossless Table)
  108. Codes of length 01 bits (000 total):
  109. Codes of length 02 bits (002 total): 03 04
  110. Codes of length 03 bits (003 total): 01 02 05
  111. Codes of length 04 bits (001 total): 00
  112. Codes of length 05 bits (001 total): 06
  113. Codes of length 06 bits (001 total): 07
  114. Codes of length 07 bits (001 total): 08
  115. Codes of length 08 bits (000 total):
  116. Codes of length 09 bits (000 total):
  117. Codes of length 10 bits (000 total):
  118. Codes of length 11 bits (000 total):
  119. Codes of length 12 bits (000 total):
  120. Codes of length 13 bits (000 total):
  121. Codes of length 14 bits (000 total):
  122. Codes of length 15 bits (000 total):
  123. Codes of length 16 bits (000 total):
  124. Total number of codes: 009
  125.  
  126. ----
  127. Destination ID = 0
  128. Class = 1 (AC Table)
  129. Codes of length 01 bits (000 total):
  130. Codes of length 02 bits (001 total): 01
  131. Codes of length 03 bits (004 total): 02 03 04 05
  132. Codes of length 04 bits (002 total): 11 06
  133. Codes of length 05 bits (001 total): 12
  134. Codes of length 06 bits (003 total): 00 21 07
  135. Codes of length 07 bits (002 total): 31 13
  136. Codes of length 08 bits (005 total): 41 22 14 15 08
  137. Codes of length 09 bits (002 total): 51 32
  138. Codes of length 10 bits (003 total): 61 23 16
  139. Codes of length 11 bits (004 total): 71 42 33 09
  140. Codes of length 12 bits (005 total): 81 91 B1 24 17
  141. Codes of length 13 bits (008 total): A1 C1 52 72 B2 34 74 36
  142. Codes of length 14 bits (004 total): F0 62 73 25
  143. Codes of length 15 bits (002 total): 35 18
  144. Codes of length 16 bits (027 total): D1 82 C2 43 53 B3 37 E1 F1 44 75 26 19 84 A2 D2
  145. 83 93 54 B4 C4 45 76 86 27 57 38
  146. Total number of codes: 073
  147.  
  148. ----
  149. Destination ID = 1
  150. Class = 1 (AC Table)
  151. Codes of length 01 bits (000 total):
  152. Codes of length 02 bits (001 total): 01
  153. Codes of length 03 bits (003 total): 11 02 03
  154. Codes of length 04 bits (003 total): 00 21 04
  155. Codes of length 05 bits (002 total): 31 12
  156. Codes of length 06 bits (003 total): 41 51 05
  157. Codes of length 07 bits (005 total): 61 71 81 22 13
  158. Codes of length 08 bits (006 total): F0 91 A1 32 14 06
  159. Codes of length 09 bits (004 total): B1 C1 D1 23
  160. Codes of length 10 bits (005 total): E1 F1 42 33 15
  161. Codes of length 11 bits (002 total): 52 62
  162. Codes of length 12 bits (005 total): 72 24 34 16 07
  163. Codes of length 13 bits (002 total): 82 43
  164. Codes of length 14 bits (004 total): 92 A2 B2 53
  165. Codes of length 15 bits (002 total): D2 63
  166. Codes of length 16 bits (011 total): 54 25 35 C2 73 17 A3 D3 44 84 45
  167. Total number of codes: 058
  168.  
  169.  
  170. *** Marker: SOS (Start of Scan) (xFFDA) ***
  171. OFFSET: 0x000001B7
  172. Scan header length = 12
  173. Number of img components = 3
  174. Component[1]: selector=0x01, table=0(DC),0(AC)
  175. Component[2]: selector=0x02, table=1(DC),1(AC)
  176. Component[3]: selector=0x03, table=1(DC),1(AC)
  177. Spectral selection = 0 .. 63
  178. Successive approximation = 0x00
  179.  
  180.  
  181. *** Decoding SCAN Data ***
  182. OFFSET: 0x000001C5
  183. Scan Decode Mode: No IDCT (DC only)
  184. NOTE: Low-resolution DC component shown. Can decode full-res with [Options->Scan Segment->Full IDCT]
  185.  
  186. Scan Data encountered marker 0xFFD9 @ 0x00043236.0
  187.  
  188. Compression stats:
  189. Compression Ratio: 3.25:1
  190. Bits per pixel: 7.39:1
  191.  
  192. Huffman code histogram stats:
  193. Huffman Table: (Dest ID: 0, Class: DC)
  194. # codes of length 01 bits: 0 ( 0%)
  195. # codes of length 02 bits: 2020 ( 43%)
  196. # codes of length 03 bits: 1950 ( 41%)
  197. # codes of length 04 bits: 321 ( 7%)
  198. # codes of length 05 bits: 186 ( 4%)
  199. # codes of length 06 bits: 121 ( 3%)
  200. # codes of length 07 bits: 97 ( 2%)
  201. # codes of length 08 bits: 43 ( 1%)
  202. # codes of length 09 bits: 14 ( 0%)
  203. # codes of length 10 bits: 0 ( 0%)
  204. # codes of length 11 bits: 0 ( 0%)
  205. # codes of length 12 bits: 0 ( 0%)
  206. # codes of length 13 bits: 0 ( 0%)
  207. # codes of length 14 bits: 0 ( 0%)
  208. # codes of length 15 bits: 0 ( 0%)
  209. # codes of length 16 bits: 0 ( 0%)
  210.  
  211. Huffman Table: (Dest ID: 1, Class: DC)
  212. # codes of length 01 bits: 0 ( 0%)
  213. # codes of length 02 bits: 4504 ( 47%)
  214. # codes of length 03 bits: 3866 ( 41%)
  215. # codes of length 04 bits: 512 ( 5%)
  216. # codes of length 05 bits: 508 ( 5%)
  217. # codes of length 06 bits: 88 ( 1%)
  218. # codes of length 07 bits: 26 ( 0%)
  219. # codes of length 08 bits: 0 ( 0%)
  220. # codes of length 09 bits: 0 ( 0%)
  221. # codes of length 10 bits: 0 ( 0%)
  222. # codes of length 11 bits: 0 ( 0%)
  223. # codes of length 12 bits: 0 ( 0%)
  224. # codes of length 13 bits: 0 ( 0%)
  225. # codes of length 14 bits: 0 ( 0%)
  226. # codes of length 15 bits: 0 ( 0%)
  227. # codes of length 16 bits: 0 ( 0%)
  228.  
  229. Huffman Table: (Dest ID: 0, Class: AC)
  230. # codes of length 01 bits: 0 ( 0%)
  231. # codes of length 02 bits: 43090 ( 19%)
  232. # codes of length 03 bits: 129910 ( 58%)
  233. # codes of length 04 bits: 22829 ( 10%)
  234. # codes of length 05 bits: 5971 ( 3%)
  235. # codes of length 06 bits: 10948 ( 5%)
  236. # codes of length 07 bits: 3920 ( 2%)
  237. # codes of length 08 bits: 4465 ( 2%)
  238. # codes of length 09 bits: 805 ( 0%)
  239. # codes of length 10 bits: 721 ( 0%)
  240. # codes of length 11 bits: 456 ( 0%)
  241. # codes of length 12 bits: 279 ( 0%)
  242. # codes of length 13 bits: 218 ( 0%)
  243. # codes of length 14 bits: 56 ( 0%)
  244. # codes of length 15 bits: 28 ( 0%)
  245. # codes of length 16 bits: 81 ( 0%)
  246.  
  247. Huffman Table: (Dest ID: 1, Class: AC)
  248. # codes of length 01 bits: 0 ( 0%)
  249. # codes of length 02 bits: 35615 ( 27%)
  250. # codes of length 03 bits: 48263 ( 36%)
  251. # codes of length 04 bits: 23370 ( 17%)
  252. # codes of length 05 bits: 7601 ( 6%)
  253. # codes of length 06 bits: 7293 ( 5%)
  254. # codes of length 07 bits: 5977 ( 4%)
  255. # codes of length 08 bits: 3246 ( 2%)
  256. # codes of length 09 bits: 1164 ( 1%)
  257. # codes of length 10 bits: 767 ( 1%)
  258. # codes of length 11 bits: 160 ( 0%)
  259. # codes of length 12 bits: 192 ( 0%)
  260. # codes of length 13 bits: 38 ( 0%)
  261. # codes of length 14 bits: 45 ( 0%)
  262. # codes of length 15 bits: 9 ( 0%)
  263. # codes of length 16 bits: 26 ( 0%)
  264.  
  265. YCC clipping in DC:
  266. Y component: [<0= 0] [>255= 0]
  267. Cb component: [<0= 0] [>255= 0]
  268. Cr component: [<0= 0] [>255= 0]
  269.  
  270. RGB clipping in DC:
  271. R component: [<0= 0] [>255= 0]
  272. G component: [<0= 0] [>255= 0]
  273. B component: [<0= 0] [>255= 0]
  274.  
  275. Average Pixel Luminance (Y):
  276. Y=[143] (range: 0..255)
  277.  
  278. Brightest Pixel Search:
  279. YCC=[ 961, -61, 14] RGB=[249,250,233] @ MCU[ 32, 7]
  280.  
  281. Finished Decoding SCAN Data
  282. Number of RESTART markers decoded: 0
  283. Next position in scan buffer: Offset 0x00043235.1
  284.  
  285.  
  286. *** Marker: EOI (End of Image) (xFFD9) ***
  287. OFFSET: 0x00043236
  288.  
  289.  
  290. *** Searching Compression Signatures ***
  291.  
  292. Signature: 01E76B1145D4662F80BA198358A896A4
  293. Signature (Rotated): 01E76B1145D4662F80BA198358A896A4
  294. File Offset: 0 bytes
  295. Chroma subsampling: 1x1
  296. EXIF Make/Model: NONE
  297. EXIF Makernotes: NONE
  298. EXIF Software: NONE
  299.  
  300. Searching Compression Signatures: (3347 built-in, 0 user(*) )
  301.  
  302. EXIF.Make / Software EXIF.Model Quality Subsamp Match?
  303. ------------------------- ----------------------------------- ---------------- --------------
  304. SW :[Adobe Photoshop ] [Save For Web 100]
  305.  
  306. NOTE: Photoshop IRB detected
  307. Based on the analysis of compression characteristics and EXIF metadata:
  308.  
  309. ASSESSMENT: Class 1 - Image is processed/edited
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