Hi Ayodeji,

You can check this link, a good discussion about the NDVI.

https://www.researchgate.net/post/How_does_one_calculate_the_percent_vegetation_cover_using_NDVI_method

Thanks so much Vijith, that link has been helpful

Thanks Vijith for uploading that link

Dear Ayodeji,

If you are just going to distinguish vegetated pixels from non-vegetated, you may use the threshholding method. Generally positive NDVI values correspong to vegetated pixels, and negative NDVIs correspond to non-vegetated pixels. In practice due to non-linear NDVI relationship with physical plant characteristics, differences in regional plant communities and various study objectives, one have to determine the threshhold values for the aims of certain work. This is not only to be based on NDVI values itself but also on field evaluation and validation data.

The following paper might be also useful

Thanks Maria