how to convert a matrix given in range 5 to 1000 into matrix 0 to 255

I have a matrix whose values lies in range from 5 to 1000. I want to convert it into he range of 0 to 255. please mention how to revert back to same range of 5 to 1000. please help

[studentambitious]

please reply, can we convert it back to the same matrix range of 5 to 1000...

Answer 1

[Walter Roberson]

round( (Matrix - 5) / (1000-5) * 255 )

[studentambitious]

Thanx for the answer it's perfectly ok ,but how can we convert this new matrix back into its original range of 5 to 1000

[Walter Roberson]

Restored = double(Scaled_Matrix) * (1000-5)/255 + 5;

Note that you lose resolution when you do this: you will not be able to restore to exactly the same as the original.