Reading in from .raw file

**sidesprang** · 04-23-2010

I got an assignment where i have to read in unsigned short values from a .raw file. Im abit unsure on how i do this in C and what i get when i do it like i have tried to do

http://pastebin.com/NNQDitWe

Code:

void main()
{
        //data is also an usnigned *short declared somewhere else in the program
        data = ReadFile();
}
 
unsigned short* ReadFile()
{
 
FILE *file = fopen("Kaisa.raw", "r");
if(!file)
{
        return NULL;
       
        unsigned short* value = (unsigned short*)malloc(512*512*210*sizeof(unsigned short*));
        fread(value, 512*512*210, 1, file);
        fclose(file);
       
        return value;
 
}

First of all, does this work?

If so what and how is the values stored in data. Is the numbers all in one line(that is 512*512*210 elements long)?

**Adak** · 04-23-2010

Since your listing does not include any header files, the answer has to be "NO", it doesn't work.

In general, if you have a hammer in your hand, you don't need to ask all your neighbors if it will work or not. Just try hammering in a nail or two, and you'll know.

**tabstop** · 04-23-2010

There's not One True ".raw" Format. That is to say, just saying your data is in a file labeled .raw doesn't tell us what's in the file.

**sidesprang** · 04-23-2010

Originally Posted by tabstop

There's not One True ".raw" Format. That is to say, just saying your data is in a file labeled .raw doesn't tell us what's in the file.

K, i've never used .raw files before did not really know how they worked. When i tried to open one in notepad++ i got just garbage. But i noticed there was another file that also was in my assignment. Kaisa.mhd. I guess that one has the information of what is in the file.

Code:

NDims = 3 
BinaryData = True 
BinaryDataByteOrderMSB = False 
Offset = -103.604 -114.96 0.0
ElementSpacing = 0.449 0.449 1.000 
DimSize = 512 512 210
ElementType = MET_USHORT 
ElementDataFile = Kaisa.raw

**tabstop** · 04-23-2010

What's probably wrong with your fread is that you are trying to read 512*512*210 pointers to ushort, when you would want 512*512*210 ushorts instead.

Searching on ".mhd file extension" gives interesting reading about MetaImage, but I don't know if it will help.

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