I am trying to generate images with textural features from raster maps using GRASS GIS (r.texture). I have tried window 3x3 and 7x7 and I selected all texture measurements. I am working with the Landsat 8 satellite images. The bands were preprocessed using i.landsat.toar and i.topo.corr.
After the bands were preprocessed, they have a range from 0,1. I have tried r.texture using those values and also I have rescaled the bands to 0,255. In both cases the r.texture and i.pca generates bands containing some NoData value.
If I use these bands to process PCA and later on classification, I will have some "gaps" when predicting land use classes. I don't know why I am having those NoData values after r.texture is processed.
Does someone have a similar problem using GRASS GIS?
أكثر...
After the bands were preprocessed, they have a range from 0,1. I have tried r.texture using those values and also I have rescaled the bands to 0,255. In both cases the r.texture and i.pca generates bands containing some NoData value.
If I use these bands to process PCA and later on classification, I will have some "gaps" when predicting land use classes. I don't know why I am having those NoData values after r.texture is processed.
Does someone have a similar problem using GRASS GIS?
أكثر...