how to remove the color formed on the edge of satellite image?

Question

my AOI requires two scene of satellite image but when I try to mosaic the images using ERDAS imagine, the color of the edge is seen forming black line after mosaic! so please how can I remove the image edge color?

Answer 1

Do you mean the outside edge of the combined image, or along the join?

Perhaps the Near Black tool in QGIS would help. Raster->Analysis->Near black.

Or if the colour is not present anywhere else, you can Reclassify that pixel type to NoData or whatever class you want.

Answer 2

My approach would be to draw a border shape around your AOI, save it to a shapefile and the use GDAL's crop_to_cutline command to crop the image to those borders. After performing this operation on both of your sat. images, you should be fine to mosaic them!

Hope it helped!