To improve the raster display quality you can apply image smoothing.
Image smoothing is the process of approximation of a pixel's color and intensity based on the values at surrounding pixels. It results in enhanced raster quality. You can choose a smoothing from the following options, based on your input data.
- None - No resampling method is applied to the raster.
- Low - It calculates the value of each cell by performing a nearest neighbor assignment. This is the most basic technique that requires the least processing time of all the interpolation algorithms. This technique selects the nearest pixels to replace the original pixels when images are zoomed.
- High - It considers the closest 2x2 neighborhood and calculates the new value of a cell based on a weighted distance average of the four nearest input cell. It provides smoother looking images than nearest neighbor. You should use this method for continuous data.