I want to implement the MATLAB [imshow][1] function in *Mathematica*.

This is a `DensityPlot[]` from *Mathematica*
>  ![This pic was Densityplot by Mathematica][2]

And this is `imshow()` image generated by *MATLAB*
>  ![This pic was print by imshow() from Matlab][3]

As you can see there's a difference between the two plots. I want to obtain smooth transition in *Mathematica* as I can in *MATLAB*.


  [1]: http://www.mathworks.com/help/images/ref/imshow.html
  [2]: https://i.sstatic.net/9Gakp.jpg
  [3]: https://i.sstatic.net/v2RO2.jpg