This often has to do with one of the header parameters such as interleave or data type. However, I have worked with some Headwall data bin files before and have seen this issue with the images looking like noise. The customer I was working with had figured out a different method for exporting the images which I could then open and read in ENVI as expected. So, if it is not related to interleave or data type, I believe it has to do with how the data are exported from this sensor. Unfortunately, I am not familiar with their software or options for export.

Thanks Mari, as always for your help. I can confirm I did try changing the interleave, and the data types but still the imagery won't display correctly. The raw imagery from headwall is infact 12-bit, which is perhaps why ENVI won't open it. The headwall software is full of glitches and issues for saving out files it seems. Restretching the raw 12-bit to 16-bit and then opening doesn't seem to work either. I will have to look closely at the software to see if there are other options for saving out files. Thanks Mari Alex