File Formats » History » Version 5
Jim Pulokas, 05/14/2013 02:03 PM
| 1 | 1 | Jim Pulokas | h1. File Formats |
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| 3 | 4 | Jim Pulokas | _...under construction..._ |
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| 5 | 1 | Jim Pulokas | h2. CCP4, MRC, and variants |
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| 7 | 4 | Jim Pulokas | |_. byte |
| 8 | offset |_. word |
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| 9 | offset |
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| 10 | (first=0) |_. word |
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| 11 | index |
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| 12 | (first=1) |_. field |_. type |_. description |_. "CCP4":http://www.ccp4.ac.uk/html/maplib.html#description |_. "MRC":http://www2.mrc-lmb.cam.ac.uk/research/locally-developed-software/image-processing-software/#image |_. "MRC-IMOD":http://bio3d.colorado.edu/imod/doc/mrc_format.txt | |
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| 13 | |>. 0 |>. 0 |>. 1 |=. N ~x~ |/3. int32 |/3. 3-D size of data array, |
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| 14 | fastest changing first | |
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| 15 | |>. 4 |>. 1 |>. 2 |=. N ~y~ | |
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| 16 | |>. 8 |>. 2 |>. 3 |=. N ~z~ | |
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| 17 | |>. 12 |>. 3 |>. 4 |=. mode | int32 | data type: |
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| 18 | 0: signed 8-bit integer |
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| 19 | 1: signed 16-bit integer |
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| 20 | 2: 32-bit float |
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| 21 | 3: 16-bit complex integer |
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| 22 | 5 | Jim Pulokas | 4: 32-bit complex float | additionally: |
| 23 | 5: same as mode 0 | | additionally: |
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| 24 | 4 | Jim Pulokas | 6: 16-bit unsigned integer |
| 25 | 16: 3x8-bit unsigned int, RGB |
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| 26 | NOTE: mode 0 may be signed |
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| 27 | or unsigned depending |
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| 28 | on codes found at byte |
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| 29 | offset 152 and 156 | |
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| 30 | |>. 16 |>. 4 |>. 5 |=. Start ~x~ |/3. int32 |/3. number of the first element |
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| 31 | in each dimension, if this |
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| 32 | is a sub-array of another | |
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| 33 | |>. 20 |>. 5 |>. 6 |=. Start ~y~ | |
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| 34 | |>. 24 |>. 6 |>. 7 |=. Start ~z~ | |
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| 35 | |>. 28 |>. 7 |>. 8 |=. Intervals ~x~ |/3. int32 |/3. number of grid intervals |
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| 36 | along each dimension | |
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| 37 | |>. 32 |>. 8 |>. 9 |=. Intervals ~y~ | |
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| 38 | |>. 36 |>. 9 |>. 10 |=. Intervals ~z~ | |
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| 39 | |>. 40 |>. 10 |>. 11 |=. Cell Length ~x~ |/3. float32 |/3. cell length in angstrom | |
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| 40 | |>. 44 |>. 11 |>. 12 |=. Cell Length ~y~ | |
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| 41 | |>. 48 |>. 12 |>. 13 |=. Cell Length ~z~ | |
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| 42 | |>. 52 |>. 13 |>. 14 |=. Cell Angle α |/3. float32 |/3. cell angles in degrees | |
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| 43 | |>. 56 |>. 14 |>. 15 |=. Cell Angle β | |
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| 44 | |>. 60 |>. 15 |>. 16 |=. Cell Angle γ | |
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| 45 | |||
| 46 | _...under construction..._ |