Error using hypercube>​findActual​ImgFileNam​e

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Ananas
Ananas 2021-12-14
编辑： Ananas 2021-12-15
I'm getting "Error using hypercube>findActualImgFileName (line 1320)" when trying to load a hyperspectral image with the hypercube function. I've opened other .hdr files before with Matlab using the hypercube function without any problems. Any ideas on what is causing the hypercube>findActualImgFileName error? I guess finding the .hdr file with the given name is not a problem, but there's something in the metadata that can't be located? There are no issues when trying to open the .hdr file with ReSe GLIMPS.
As seen in the screenshot I checked that a normal .jpg image can be found in the current folder, and also tested the hypercube with the 'indian_pines.dat' image that comes with Matlab to check if the hypercube is working as it should. No errors so far. Then in the third section I try to load my own hyperspectral image and that's when I get an error about finding the actual image file name.

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Walter Roberson
Walter Roberson 2021-12-14
编辑：Walter Roberson 2021-12-14
https://www.mathworks.com/help/images/ref/hypercube.html#mw_b54577f2-e515-4486-875c-c270df8b6083
"Read ENVI format data into the workspace by specifying a header file that contains information about hyperspectral data. The associated ENVI binary data file must be stored in the same folder as the ENVI header file."
and see https://www.mathworks.com/help/images/ref/hypercube.html#d123e305031 which indicates that it expects a .dat file or .L1R file when you use a .hdr file.
I seem to recall that .hdr files have the name of the corresponding image data stored inside them, so I suspect the file extension is not completely important. However, I suspect that the .hdr file is saying that the image data is stored in a file that has the same name but no extension at all. In particular, I do not think the .hdr file is referring the the .hyspex file.
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Ananas
Ananas 2021-12-14
It works when using two arguments, thank you:)
Curiously enough it only works when I switch places for the arguments. Meaning hypercube("hyspex-file", "hdr-file") gives an error, but hypercube("hdr-file", "hyspex-file") runs.
if I try
hcube = hypercube("A1_VNIR_1800_SN00841_15000us_2021-07-12T140630_raw.hyspex", "A1_VNIR_1800_SN00841_15000us_2021-07-12T140630_raw.hdr");
I get:
Error using hypercube (line 400)
Input file format must be ENVI, TIFF, or NITF.
Error in tests (line 13)
hcube = hypercube("A1_VNIR_1800_SN00841_15000us_2021-07-12T140630_raw.hyspex",
"A1_VNIR_1800_SN00841_15000us_2021-07-12T140630_raw.hdr");
but when I try
hcube = hypercube("A1_VNIR_1800_SN00841_15000us_2021-07-12T140630_raw.hdr", "A1_VNIR_1800_SN00841_15000us_2021-07-12T140630_raw.hyspex");
There's no error and I'm able to use hyperspectralViewer(hcube) and view the image.
Walter Roberson
Walter Roberson 2021-12-15
Interestingly, there is specific code in hypercube() to detect if the parameter order has been reversed by the user by checking the first parameter for ".hdr". I did not happen to check whether that was done before or after the file format was checked.

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