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abahena

ho can I read 3d volumes in raw format?

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abahena    122
hi, Any idea ho can I read 3d volumes in raw format? Also how can I turn discrete values in xyz coordinates? thanks in advance, Alex

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Evil Steve    2017
We need much more information than that.

What language?
What API?
What "raw" values are you talking about? What's "raw" about them?
Read them from where?
What do you mean "turn discrete values in xyz coordinates"?

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glaeken    294
On the absence of more information:

The typical volume data stored in a .RAW file is usually stored linearly:

slice1, slice2....sliceN where each slice is Width x Height long.

Pseudo code for reading a RAW volume data file (note: assumes scalars):

Size = Width * Height * Depth;
for i to Size
data[i] = read NBytes.

where NBytes is the storage size of the data (sizeof( byte ) for 8-bit, sizeof( byte * 2) for 16-bit, etc). This, of course depending on the language, could be much faster. Example in C:

fread( data, NBytes * Width * Height * Depth, RAWfile );

Then to access a point at x, y, z: data[x + (y * Width) + (z * Width * Height)]

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