File Formats » History » Version 7
Jim Pulokas, 05/14/2013 02:24 PM
| 1 | 1 | Jim Pulokas | h1. File Formats |
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| 2 | |||
| 3 | 4 | Jim Pulokas | _...under construction..._ |
| 4 | |||
| 5 | 1 | Jim Pulokas | h2. CCP4, MRC, and variants |
| 6 | |||
| 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 | 6 | Jim Pulokas | |>. 0 |>. 0 |>. 1 |=. N ~x~ | int32 |/3. 3-D size of data array, |
| 14 | 4 | Jim Pulokas | fastest changing first | |
| 15 | 6 | Jim Pulokas | |>. 4 |>. 1 |>. 2 |=. N ~y~ | int32 | |
| 16 | |>. 8 |>. 2 |>. 3 |=. N ~z~ | int32 | |
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| 17 | 4 | Jim Pulokas | |>. 12 |>. 3 |>. 4 |=. mode | int32 | data type: |
| 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 | 6 | Jim Pulokas | |>. 16 |>. 4 |>. 5 |=. Start ~x~ | int32 |/3. number of the first element |
| 31 | 1 | Jim Pulokas | in each dimension, if this |
| 32 | is a sub-array of another | |
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| 33 | 6 | Jim Pulokas | |>. 20 |>. 5 |>. 6 |=. Start ~y~ | int32 | |
| 34 | |>. 24 |>. 6 |>. 7 |=. Start ~z~ | int32 | |
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| 35 | |>. 28 |>. 7 |>. 8 |=. Intervals ~x~ | int32 |/3. number of grid intervals |
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| 36 | 4 | Jim Pulokas | along each dimension | |
| 37 | 6 | Jim Pulokas | |>. 32 |>. 8 |>. 9 |=. Intervals ~y~ | int32 | |
| 38 | |>. 36 |>. 9 |>. 10 |=. Intervals ~z~ | int32 | |
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| 39 | |>. 40 |>. 10 |>. 11 |=. Cell Length ~x~ | float32 |/3. cell length in angstrom | |
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| 40 | |>. 44 |>. 11 |>. 12 |=. Cell Length ~y~ | float32 | |
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| 41 | |>. 48 |>. 12 |>. 13 |=. Cell Length ~z~ | float32 | |
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| 42 | |>. 52 |>. 13 |>. 14 |=. Cell Angle α | float32 |/3. cell angles in degrees |\2/3. |/3. ignored by IMOD | |
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| 43 | |>. 56 |>. 14 |>. 15 |=. Cell Angle β | float32 | |
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| 44 | |>. 60 |>. 15 |>. 16 |=. Cell Angle γ | float32 | |
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| 45 | 7 | Jim Pulokas | |>. 64 |>. 16 |>. 17 |=. Column axis | int32 |/3. 1 -> X |
| 46 | 2 -> Y |
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| 47 | 3 -> Z | |
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| 48 | |>. 68 |>. 17 |>. 18 |=. Row axis | int32 | |
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| 49 | |>. 72 |>. 18 |>. 19 |=. Section axis | int32 | |
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| 50 | |>. 76 |>. 19 |>. 20 |=. Minimum density | float32 |/3. statistics calculated |
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| 51 | from the data | |
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| 52 | |>. 80 |>. 20 |>. 21 |=. Maximum density | float32 | |
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| 53 | |>. 84 |>. 21 |>. 22 |=. Mean density | float32 | |
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| 54 | 4 | Jim Pulokas | |
| 55 | _...under construction..._ |