Bitmap interpolation using bitmap class

There is a grid, the grid size consists of 16*16 rows and columns. Each grid is filled with a color value. Now I want to have a smooth image/interpolated image (Please refer this link: http://en.wikipedia.org/wiki/Bilinear_interpolation. Please 开发者_StackOverflowrefer to this figure with the explanation (Example of bilinear interpolation on the unit square with the z-values 0, 1, 1 and 0.5 as indicated. Interpolated values in between represented by color.))

How do I achieve this using the bitmap class?

Your question seems to indicate that you want to scale a color image up and use bilinear interpolation to create a smooth color gradient.

You have to create a new bitmap with the desired color depth and size. You also need to access the pixel colors of the old bitmap and use those values to modify the pixel colors of the new bitmp.

If you are not concerned about performance you can use GetPixel and SetPixel to read and write individual pixels. You can also access the underlying bitmap data directly using LockBits. This is more complicated and requires a deeper understanding of how pixels are stored in memory but can provide better performance when modifying the entire bitmap.