function out = color_conv(in, type_in, type_out)
[ny,nx] = size(in)

% Get LAB-Data
color_write('color_in.dat',in);
commandStr = sprintf('color_conv.exe %s %s %s %s','color_in.dat', 'color_out.dat',type_in, type_out);
dos(commandStr);
out = color_read('color_out.dat');