I need to perform DN to Reflectance conversion on subset of image in specific band not multi-spectral image. I am able to do it on multispectral image.
@ Abdelaziz...i have got surface reflectance poduct (DN to TOA reflectance) from USGS after submitting my order to process L1T product. But when i chked the pixel values thru cursor location/value...it's like DN values...whereas reflectance is from 0 to 1.
I could do it in ENVI classic. Radiometric correction provides radiance & reflectance.
@ Thanks Ridhi. I tried with that also but i found that if i do it using formula in Band Math and directly by radiometric correction....both images (reflectance values ) are different. I must be doing something wrong.
Now regarding my question...i could do it for spectral and spatial subset both using ENVI 5.3. Radiometric correction does the conversion. Then open the saved image in ENVI classic and perform spatial subsetting using resize. Now you can load spatial subset band wise.