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Previous: Mathematical Operations on Two Rasters
The highly anticipatedRasterConvolveris finally here!New to FME 2018.1,the RasterConvolver is a transformer that applies a convolution filter to raster data.Convolution filters are applied using a kernel which is specified by a matrix of weights for the neighboring values.Filtering can be used to smooth,sharpen,enhance edges and other raster image manipulation operations.
In this scenario,you are interested in applying a convolution filter in order to sharpen a GeoTIFF image.For more information on Raster processing using the RasterConvolver,check out theEdge Detection with the RasterConvolverarticle or theRaster Slope Calculations as a RasterConvolver Examplearticle.
The RasterConvolver accepts input features containing a raster geometry and outputs the features after applying a convolution filter to each band.
Note: By default,the preserve band interpretation is set to No - leaving this as No would convert the Red,Green,and Blue bandsof the GeoTIFF to Real64 (i.e.convert to a grayscale image).
Data used in this tutorial originates from open data made available by theCity of Vancouver,British Columbia.It contains information licensed under the Open Government License - Vancouver.
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