What is Mask processing? Explain it.

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Explain the image enhancement technique.
It is a technique to process an image to enhance certain features of the image.So, that the results is were suitable than the original image.
There are two technique of image enhancement:-
➡️ Spatial domain technique:-
      https://technicaleduarkujur.blogspot.com/2020/12/blog-post.html                  This technique works an image plane itself i.e., this technique tries to directly manipulate the pixel in the image.
➡️ Frequency domain technique:-
                         In this technique operation are performed on the Fourier transform of an image rather than on the image itself i.e.,first we take Fourier transform.
It is another kind of spatial domain operation where neighbourhood size is larger than 1.i.e. 3×3, 5×5 etc.
                  The kind of Operation is known as Mask processing.
        In case of mask processing operations we have to define a neighbourhood arround every pixel p(x,y) at which we want to get intensity value in the processed image and for doing this it is not intensity value of that particular pixel but also the intensity value of pixel arround that point which is within the neighbourhood of that point.
                All of them take part in deciding what will be the intensity value at corresponding location (x,y) is produced image g.
              For mask processing firsy we define a mask.Here the Mask is of 3×3 dimension.

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