Hello everyone,
I have a specific question regarding the visual quality of a raster after reprojection and change in spatial resolution, especially concerning differences in colors and sharpness, and I would like to understand whether this behavior is expected and how to minimize the issue.
I am working with an RGB orthomosaic (≈ 5 GB), originally in a geographic coordinate system (WGS84, degrees), with a spatial resolution of approximately 1.5 cm per pixel. I reprojected this raster to SIRGAS 2000 / UTM Zone 22S and then resampled it to a 3 cm pixel size.
After this process, I noticed that the reprojected image shows:
a slight loss of sharpness compared to the original;
small differences in color tone and contrast;
band statistics that are similar, but not identical, to those of the original raster.
My main question is how I can correct or minimize this loss of visual quality, and which best practices I should adopt to prevent this from happening in future reprojection workflows.
I have attached the original and the reprojected images so that you can visually compare the differences in quality between them.
I would greatly appreciate any guidance or practical experience regarding this type of processing with high-resolution orthomosaics.
Thank you very much!
