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Add NObject; don't load image by default when reading
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Erik Kastman
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Feb 3, 2011
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,172 +1,178 @@ | ||
| # Varaibles used to determine endianness. | ||
| x = 0xdeadbeef | ||
| endian_type = { | ||
| Array(x).pack("V*") => false, # Little | ||
| Array(x).pack("N*") => true # Big | ||
| } | ||
| # System (CPU) Endianness. | ||
| CPU_ENDIAN = endian_type[Array(x).pack("L*")] | ||
|
|
||
| # Custom string used for (un)packing big endian signed short. | ||
| CUSTOM_SS = "k*" | ||
| # Custom string used for (un)packing big endian signed long. | ||
| CUSTOM_SL = "r*" | ||
|
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| # Q/S Form Transform codes defined in the nifti header | ||
| # Reference: http://nifti.nimh.nih.gov/nifti-1/documentation/nifti1fields/nifti1fields_pages/qsform.html | ||
| XFORM_CODES = { | ||
| 0 => 'NIFTI_XFORM_UNKNOWN', # Arbitrary coordinates (Method 1). | ||
| 1 => 'NIFTI_XFORM_SCANNER_ANAT', # Scanner-based anatomical coordinates | ||
| 2 => 'NIFTI_XFORM_ALIGNED_ANAT', # Coordinates aligned to another file's, or to anatomical "truth". | ||
| 3 => 'NIFTI_XFORM_TALAIRACH', # Coordinates aligned to Talairach-Tournoux Atlas; (0,0,0)=AC, etc. | ||
| 4 => 'NIFTI_XFORM_MNI_152' # MNI 152 normalized coordinates | ||
| } | ||
|
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| HEADER_SIGNATURE = [ | ||
| # /**********************/ /**********************/ /***************/ | ||
| # struct nifti_1_header { /* NIFTI-1 usage */ /*ANALYZE 7.5 field(s)*/ /* Byte offset */ | ||
| # /**********************/ /**********************/ /***************/ | ||
| # int sizeof_hdr; /*!< MUST be 348 */ /* int sizeof_hdr; */ /* 0 */ | ||
| ['sizeof_hdr', 4, 'UL'], | ||
| module Nifti | ||
| # Varaibles used to determine endianness. | ||
| x = 0xdeadbeef | ||
| endian_type = { | ||
| Array(x).pack("V*") => false, # Little | ||
| Array(x).pack("N*") => true # Big | ||
| } | ||
| # System (CPU) Endianness. | ||
| CPU_ENDIAN = endian_type[Array(x).pack("L*")] | ||
|
|
||
| # Custom string used for (un)packing big endian signed short. | ||
| CUSTOM_SS = "k*" | ||
| # Custom string used for (un)packing big endian signed long. | ||
| CUSTOM_SL = "r*" | ||
|
|
||
| # Q/S Form Transform codes defined in the nifti header | ||
| # Reference: http://nifti.nimh.nih.gov/nifti-1/documentation/nifti1fields/nifti1fields_pages/qsform.html | ||
| XFORM_CODES = { | ||
| 0 => 'NIFTI_XFORM_UNKNOWN', # Arbitrary coordinates (Method 1). | ||
| 1 => 'NIFTI_XFORM_SCANNER_ANAT', # Scanner-based anatomical coordinates | ||
| 2 => 'NIFTI_XFORM_ALIGNED_ANAT', # Coordinates aligned to another file's, or to anatomical "truth". | ||
| 3 => 'NIFTI_XFORM_TALAIRACH', # Coordinates aligned to Talairach-Tournoux Atlas; (0,0,0)=AC, etc. | ||
| 4 => 'NIFTI_XFORM_MNI_152' # MNI 152 normalized coordinates | ||
| } | ||
|
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||
| # The Nifti signature is hardcoded by bytes. This consists of arrays for | ||
| # each item in the signature, where item[0] is the name of the item, | ||
| # item[1] is the length in bytes of the item, and dim[2] is the Format | ||
| # string to use in packing/unpacking the item. | ||
| HEADER_SIGNATURE = [ | ||
| # /**********************/ /**********************/ /***************/ | ||
| # struct nifti_1_header { /* NIFTI-1 usage */ /*ANALYZE 7.5 field(s)*/ /* Byte offset */ | ||
| # /**********************/ /**********************/ /***************/ | ||
| # int sizeof_hdr; /*!< MUST be 348 */ /* int sizeof_hdr; */ /* 0 */ | ||
| ['sizeof_hdr', 4, 'UL'], | ||
|
|
||
| # char data_type[10]; /*!< ++UNUSED++ */ /* char data_type[10]; */ /* 4 */ | ||
| ['data_type', 10, 'STR'], | ||
| # char data_type[10]; /*!< ++UNUSED++ */ /* char data_type[10]; */ /* 4 */ | ||
| ['data_type', 10, 'STR'], | ||
|
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||
| # char db_name[18]; /*!< ++UNUSED++ */ /* char db_name[18]; */ /* 14 */ | ||
| ['db_name', 18, 'STR'], | ||
| # char db_name[18]; /*!< ++UNUSED++ */ /* char db_name[18]; */ /* 14 */ | ||
| ['db_name', 18, 'STR'], | ||
|
|
||
| # int extents; /*!< ++UNUSED++ */ /* int extents; */ /* 32 */ | ||
| ['extents', 4, "UL"], | ||
| # int extents; /*!< ++UNUSED++ */ /* int extents; */ /* 32 */ | ||
| ['extents', 4, "UL"], | ||
|
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||
| # short session_error; /*!< ++UNUSED++ */ /* short session_error; */ /* 36 */ | ||
| ['session_error', 2, "US"], | ||
| # short session_error; /*!< ++UNUSED++ */ /* short session_error; */ /* 36 */ | ||
| ['session_error', 2, "US"], | ||
|
|
||
| # char regular; /*!< ++UNUSED++ */ /* char regular; */ /* 38 */ | ||
| ['regular', 1, "STR"], | ||
| # char regular; /*!< ++UNUSED++ */ /* char regular; */ /* 38 */ | ||
| ['regular', 1, "STR"], | ||
|
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||
| # char dim_info; /*!< MRI slice ordering. */ /* char hkey_un0; */ /* 39 */ | ||
| ['dim_info', 1, "BY"], | ||
| # char dim_info; /*!< MRI slice ordering. */ /* char hkey_un0; */ /* 39 */ | ||
| ['dim_info', 1, "BY"], | ||
|
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|
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| # /*--- was image_dimension substruct ---*/ | ||
| # short dim[8]; /*!< Data array dimensions.*/ /* short dim[8]; */ /* 40 */ | ||
| ['dim', 16, "US"], | ||
| # /*--- was image_dimension substruct ---*/ | ||
| # short dim[8]; /*!< Data array dimensions.*/ /* short dim[8]; */ /* 40 */ | ||
| ['dim', 16, "US"], | ||
|
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| # float intent_p1; /*!< 1st intent parameter. */ /* short unused8; */ /* 56 */ | ||
| ['intent_p1', 4, "FL"], | ||
| # float intent_p1; /*!< 1st intent parameter. */ /* short unused8; */ /* 56 */ | ||
| ['intent_p1', 4, "FL"], | ||
|
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| # float intent_p2; /*!< 2nd intent parameter. */ /* short unused10; */ /* 60 */ | ||
| ['intent_p2', 4, "FL"], | ||
| # /* short unused11; */ | ||
| # float intent_p3; /*!< 3rd intent parameter. */ /* short unused12; */ /* 64 */ | ||
| ['intent_p3', 4, "FL"], | ||
| # float intent_p2; /*!< 2nd intent parameter. */ /* short unused10; */ /* 60 */ | ||
| ['intent_p2', 4, "FL"], | ||
| # /* short unused11; */ | ||
| # float intent_p3; /*!< 3rd intent parameter. */ /* short unused12; */ /* 64 */ | ||
| ['intent_p3', 4, "FL"], | ||
|
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| # short intent_code; /*!< NIFTIINTENT code. */ /* short unused14; */ /* 68 */ | ||
| ['intent_code', 2, "US"], | ||
| # short intent_code; /*!< NIFTIINTENT code. */ /* short unused14; */ /* 68 */ | ||
| ['intent_code', 2, "US"], | ||
|
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| # short datatype; /*!< Defines data type! */ /* short datatype; */ /* 70 */ | ||
| ['datatype', 2, "US"], | ||
| # short datatype; /*!< Defines data type! */ /* short datatype; */ /* 70 */ | ||
| ['datatype', 2, "US"], | ||
|
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| # short bitpix; /*!< Number bits/voxel. */ /* short bitpix; */ /* 72 */ | ||
| ['bitpix', 2, "US"], | ||
| # short bitpix; /*!< Number bits/voxel. */ /* short bitpix; */ /* 72 */ | ||
| ['bitpix', 2, "US"], | ||
|
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| # short slice_start; /*!< First slice index. */ /* short dim_un0; */ /* 74 */ | ||
| ['slice_start', 2, "US"], | ||
| # short slice_start; /*!< First slice index. */ /* short dim_un0; */ /* 74 */ | ||
| ['slice_start', 2, "US"], | ||
|
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| # float pixdim[8]; /*!< Grid spacings. */ /* float pixdim[8]; */ /* 76 */ | ||
| ['pixdim', 32, "FL"], | ||
| # float pixdim[8]; /*!< Grid spacings. */ /* float pixdim[8]; */ /* 76 */ | ||
| ['pixdim', 32, "FL"], | ||
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| # float vox_offset; /*!< Offset into .nii file */ /* float vox_offset; */ /* 108 */ | ||
| ['vox_offset', 4, "FL"], | ||
| # float vox_offset; /*!< Offset into .nii file */ /* float vox_offset; */ /* 108 */ | ||
| ['vox_offset', 4, "FL"], | ||
|
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| # float scl_slope; /*!< Data scaling: slope. */ /* float funused1; */ /* 112 */ | ||
| ['scl_slope', 4, "FL"], | ||
| # float scl_slope; /*!< Data scaling: slope. */ /* float funused1; */ /* 112 */ | ||
| ['scl_slope', 4, "FL"], | ||
|
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| # float scl_inter; /*!< Data scaling: offset. */ /* float funused2; */ /* 116 */ | ||
| ['scl_inter', 4, "FL"], | ||
| # float scl_inter; /*!< Data scaling: offset. */ /* float funused2; */ /* 116 */ | ||
| ['scl_inter', 4, "FL"], | ||
|
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| # short slice_end; /*!< Last slice index. */ /* float funused3; */ /* 120 */ | ||
| ['slice_end', 2, "US"], | ||
| # short slice_end; /*!< Last slice index. */ /* float funused3; */ /* 120 */ | ||
| ['slice_end', 2, "US"], | ||
|
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| # char slice_code; /*!< Slice timing order. */ /* 122 */ | ||
| ['slice_code', 1, "BY"], | ||
| # char slice_code; /*!< Slice timing order. */ /* 122 */ | ||
| ['slice_code', 1, "BY"], | ||
|
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| # char xyzt_units; /*!< Units of pixdim[1..4] */ /* 123 */ | ||
| ['xyzt_units', 1, "BY"], | ||
| # char xyzt_units; /*!< Units of pixdim[1..4] */ /* 123 */ | ||
| ['xyzt_units', 1, "BY"], | ||
|
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| # float cal_max; /*!< Max display intensity */ /* float cal_max; */ /* 124 */ | ||
| ['cal_max', 4, "FL"], | ||
| # float cal_max; /*!< Max display intensity */ /* float cal_max; */ /* 124 */ | ||
| ['cal_max', 4, "FL"], | ||
|
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| # float cal_min; /*!< Min display intensity */ /* float cal_min; */ /* 128 */ | ||
| ['cal_min', 4, "FL"], | ||
| # float cal_min; /*!< Min display intensity */ /* float cal_min; */ /* 128 */ | ||
| ['cal_min', 4, "FL"], | ||
|
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| # float slice_duration;/*!< Time for 1 slice. */ /* float compressed; */ /* 132 */ | ||
| ['slice_duration', 4, "FL"], | ||
| # float slice_duration;/*!< Time for 1 slice. */ /* float compressed; */ /* 132 */ | ||
| ['slice_duration', 4, "FL"], | ||
|
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| # float toffset; /*!< Time axis shift. */ /* float verified; */ /* 136 */ | ||
| ['toffset', 4, "FL"], | ||
| # float toffset; /*!< Time axis shift. */ /* float verified; */ /* 136 */ | ||
| ['toffset', 4, "FL"], | ||
|
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||
| # int glmax; /*!< ++UNUSED++ */ /* int glmax; */ /* 140 */ | ||
| ['glmax', 4, "UL"], | ||
| # int glmax; /*!< ++UNUSED++ */ /* int glmax; */ /* 140 */ | ||
| ['glmax', 4, "UL"], | ||
|
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||
| # int glmin; /*!< ++UNUSED++ */ /* int glmin; */ /* 144 */ | ||
| ['glmin', 4, "UL"], | ||
| # int glmin; /*!< ++UNUSED++ */ /* int glmin; */ /* 144 */ | ||
| ['glmin', 4, "UL"], | ||
|
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| # /*--- was data_history substruct ---*/ | ||
| # char descrip[80]; /*!< any text you like. */ /* char descrip[80]; */ /* 148 */ | ||
| ['descrip', 80, "STR"], | ||
| # /*--- was data_history substruct ---*/ | ||
| # char descrip[80]; /*!< any text you like. */ /* char descrip[80]; */ /* 148 */ | ||
| ['descrip', 80, "STR"], | ||
|
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| # char aux_file[24]; /*!< auxiliary filename. */ /* char aux_file[24]; */ /* 228 */ | ||
| ['aux_file', 24, "STR"], | ||
| # char aux_file[24]; /*!< auxiliary filename. */ /* char aux_file[24]; */ /* 228 */ | ||
| ['aux_file', 24, "STR"], | ||
|
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||
| # | ||
| # short qform_code; /*!< NIFTIXFORM code. */ /*-- all ANALYZE 7.5 ---*/ /* 252 */ | ||
| ['qform_code', 2, "US"], # /* fields below here */ | ||
| # /* are replaced */ | ||
| # short sform_code; /*!< NIFTIXFORM code. */ /* 254 */ | ||
| ['sform_code', 2, "US"], | ||
| # | ||
| # float quatern_b; /*!< Quaternion b param. */ /* 256 */ | ||
| ['quatern_b', 4, "FL"], | ||
| # | ||
| # short qform_code; /*!< NIFTIXFORM code. */ /*-- all ANALYZE 7.5 ---*/ /* 252 */ | ||
| ['qform_code', 2, "US"], # /* fields below here */ | ||
| # /* are replaced */ | ||
| # short sform_code; /*!< NIFTIXFORM code. */ /* 254 */ | ||
| ['sform_code', 2, "US"], | ||
| # | ||
| # float quatern_b; /*!< Quaternion b param. */ /* 256 */ | ||
| ['quatern_b', 4, "FL"], | ||
|
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| # float quatern_c; /*!< Quaternion c param. */ /* 260 */ | ||
| ['quatern_c', 4, "FL"], | ||
| # float quatern_c; /*!< Quaternion c param. */ /* 260 */ | ||
| ['quatern_c', 4, "FL"], | ||
|
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| # float quatern_d; /*!< Quaternion d param. */ /* 264 */ | ||
| ['quatern_d', 4, "FL"], | ||
| # float quatern_d; /*!< Quaternion d param. */ /* 264 */ | ||
| ['quatern_d', 4, "FL"], | ||
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| # float qoffset_x; /*!< Quaternion x shift. */ /* 268 */ | ||
| ['qoffset_x', 4, "FL"], | ||
| # float qoffset_x; /*!< Quaternion x shift. */ /* 268 */ | ||
| ['qoffset_x', 4, "FL"], | ||
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| # float qoffset_y; /*!< Quaternion y shift. */ /* 272 */ | ||
| ['qoffset_y', 4, "FL"], | ||
| # float qoffset_y; /*!< Quaternion y shift. */ /* 272 */ | ||
| ['qoffset_y', 4, "FL"], | ||
|
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| # float qoffset_z; /*!< Quaternion z shift. */ /* 276 */ | ||
| ['qoffset_z', 4, "FL"], | ||
| # float qoffset_z; /*!< Quaternion z shift. */ /* 276 */ | ||
| ['qoffset_z', 4, "FL"], | ||
|
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| # float srow_x[4]; /*!< 1st row affine transform. */ /* 280 */ | ||
| ['srow_x', 16, "FL"], | ||
| # float srow_x[4]; /*!< 1st row affine transform. */ /* 280 */ | ||
| ['srow_x', 16, "FL"], | ||
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| # float srow_y[4]; /*!< 2nd row affine transform. */ /* 296 */ | ||
| ['srow_y', 16, "FL"], | ||
| # float srow_y[4]; /*!< 2nd row affine transform. */ /* 296 */ | ||
| ['srow_y', 16, "FL"], | ||
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| # float srow_z[4]; /*!< 3rd row affine transform. */ /* 312 */ | ||
| ['srow_z', 16, "FL"], | ||
| # float srow_z[4]; /*!< 3rd row affine transform. */ /* 312 */ | ||
| ['srow_z', 16, "FL"], | ||
|
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| # | ||
| # | ||
| # char intent_name[16];/*!< name or meaning of data. */ /* 328 */ | ||
| ['intent_name', 16, "STR"], | ||
| # | ||
| # | ||
| # char intent_name[16];/*!< name or meaning of data. */ /* 328 */ | ||
| ['intent_name', 16, "STR"], | ||
|
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| # | ||
| # | ||
| # char magic[4]; /*!< MUST be "ni1\0" or "n+1\0". */ /* 344 */ | ||
| ['magic', 4, "STR"] | ||
| # | ||
| # | ||
| # char magic[4]; /*!< MUST be "ni1\0" or "n+1\0". */ /* 344 */ | ||
| ['magic', 4, "STR"] | ||
|
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| # } ; /** 348 bytes total **/ | ||
| # | ||
| # | ||
| # } ; /** 348 bytes total **/ | ||
| # | ||
| # | ||
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| ] | ||
| ] | ||
| end |
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