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I have raw images that I can import and view with ImageJ. They are the output of a program which I don't have the source code for, so I'm stuck with the output format.

They are imported as follows with ImageJ:

Image type: 16 bit Unsigned

Width: 320

Height: 25600

Offset to fist image: 0 bytes

Number of images: 1

Gap Between images: 0 bytes

White is zero unchecked

Little-endian byte order unchecked

Open all files in folder unchecked

use virtual stack unchecked.

Essentially each RAW file is a stack of 100 320 x 256 images.

When I try importing via Import[] in Mathematica, I get

LibraryFunction::rterr: An error with return code -2 was encountered evaluating the function ReadImageRAW.

Import::fmterr: Cannot import data as Raw format.

I can't seem to find any info on the first error message.

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  • $\begingroup$ Maybe the import filters "RawBitmap" or "BMP" with their various options may help. Have a look at their documentation. Since you do not provide example files, you have to try it on your own. $\endgroup$
    – Henrik Schumacher
    Commented Jan 10, 2019 at 16:52
  • $\begingroup$ Thanks for the response! I think RawBitmap is getting me closer, but it's giving me Import::coerr: Invalid setting ImageSize -> {320,25600}. $\endgroup$
    – 2close2see
    Commented Jan 10, 2019 at 17:14
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    $\begingroup$ You may also try Import[file, "UnsignedInteger16"] and convert it to an image with Image. $\endgroup$
    – Henrik Schumacher
    Commented Jan 10, 2019 at 17:21
  • $\begingroup$ BRILLIANT! "UnsignedInteger16" worked. Thanks so much....it entered everything as a list of all 8 million values so I'll have to do some massaging to get the formatting right, but that's a huge help. $\endgroup$
    – 2close2see
    Commented Jan 10, 2019 at 17:34

2 Answers 2

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images = Image /@ ArrayReshape[Import[file, "UnsignedInteger16"], {100, 256, 320}];
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  • $\begingroup$ I have not tested this but I believe that this (or a small variation of it) should do the trick. $\endgroup$
    – Henrik Schumacher
    Commented Jan 10, 2019 at 17:41
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    $\begingroup$ It looks like the width and height were switched, but the output doesn't look quite right. comparison with imageJ output Again, thanks so much for the help! $\endgroup$
    – 2close2see
    Commented Jan 10, 2019 at 18:29
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    $\begingroup$ images = Image /@ ArrayReshape[Import[file, "UnsignedInteger16"], {100, 256, 320}] ended up being the winner...thank you so much! $\endgroup$
    – 2close2see
    Commented Jan 10, 2019 at 19:12
  • $\begingroup$ You're welcome! $\endgroup$
    – Henrik Schumacher
    Commented Jan 10, 2019 at 19:16
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After some dig in version 13, I found a package that can do this indeed. And I have tried Canon and Sony, so far so good.

<< ImageFileTools`

Here is a function ImageFileTools`Raw`RawGet, and its usage is:

? ImageFileTools`Raw`RawGet

enter image description here

Usage

enter image description here

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  • $\begingroup$ I am trying it on a ARW file. I am getting the error: Failure["InitializationFailure", <|"MessageTemplate" -> "Failed to initialize.", "MessageParameters" -> <||>, "ErrorCode" -> -74, "Parameters" -> {"Raw::Reader::initializeLibRawObject: Failed to initialize LibRaw object"}|>] $\endgroup$
    – user13892
    Commented May 30 at 20:57

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