When images are resized to a larger size from originally smaller size, some new data needs to be generated. Interpolation is used to generate new data.
There are two types of interpolation methods : adaptive and non-adaptive. All the adaptive methods are licensed.
Non-adaptive methods are supported by ImageDatasetGenerator. We can set its interpolation method by using the parameter "interpolation".
The default value of interpolation parameter is bilinear.
The other supported values are : nearest, bicubic, area, lanczos3, lanczos5, gaussian, mitchellcubic
You can get a good information about interpolation here
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