How to open a .raw file in MATLAB

59 次查看（过去 30 天）
Chuqi Zhong
Chuqi Zhong 2019-1-3
回答： Duncan Carlsmith 2023-8-8
I'm using a hyperspectral analyzer to analyse something, and I got four files from it. They are .bmp, .dci, .hdr and .raw, .bmp is the picture obviously. Now I have no idea how to use MATLAB to open the .raw file. So I really need some help, I have been thinking it for weeks.
Here are some information from the .dci and .hdr :
Camera=DUALIX SENSOR; Red=81; Green=51; Blue=32; ExposureTime=5.000000; Gain=2.000000; ObjectDistance=-232.811111; samples=800; lines=1380; bands=150; file type= ENVI Standard; data type=12; wavelength units= nm; binning={2,8}; wavelength={.......}

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回答（2 个）

Prakhar Jain
Prakhar Jain 2019-1-7
Duncan Carlsmith
Duncan Carlsmith 2023-8-8
Some references applicable to "rgb" "raw" and dng are
https://blogs.mathworks.com/steve/2011/03/08/tips-for-reading-a-camera-raw-file-into-matlab/
https://www.linkedin.com/pulse/developing-iphone-raw-images-using-matlab-knut-inge-hvidsten/
https://www.rcsumner.net/raw_guide/RAWguide.pdf
https://www.mathworks.com/matlabcentral/answers/81448-loading-in-raw-image-data-using-the-tiff-class-images-return-as-all-zeros-multiple-warnings
https://helpx.adobe.com/camera-raw/digital-negative.html#dng_sdk_download
https://www.mathworks.com/matlabcentral/fileexchange/71420-dng-to-rgb-converter
To read a "raw," you will need to know about format. imfinfo may help unpack that. I rather learned that the hard way discovering APPLE's ProRAW is not "raw" at all. Instead the DNG produced is compressed dng. Adobe's converter uncompresses to dng and this is not raw. Instead it contains a linearized processed (demosaiced) 3d array along with a linearization curve in the first SubIFD along with various previews in ohter SubIFDs. See https://kirkville.com/apples-new-proraw-photo-format-is-neither-pro-nor-raw/

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