ind2height.m

matlab处理图像的一些基本方法。其中有一部分mex程序需要安装编译

function  Height = ind2height(Header, Image)
%IND2HEIGHT Convert the image data into heigth values in nm.
%	
%	K = IND2HEIGHT(HEADER, IMAGE) 
%
%	return a matrix of the same size as IMAGE
%	conteining the height values in nm.
%	The trasformation has done on the base of the	
%	formulas reported at pag 85 of the STM manual.
%
%	See also ...
%
%	Claudio 11 August 1994
%
% if it is an imported image and alex added the Trasform Factor
% parameter to the header.
%
% If the message Image data UNKNOWN appears you should add to this function
% the appropriate transformation of your data. 

%
% Copyright (c) 1995 by Claudio Rivetti and Mark Young
% [e-mail],    [e-mail]
%

fact=getparameter(Header, 'Trasform. Factor', 1);
if fact ~= inf & ~isempty(fact)
  Height = Image * fact;
  return;
end

%For a version 4 file format
if getparameter(Header, 'Version',1) ~= inf 
  [zs, u]=zscale(Header);
  Height=Image*(zs/65536);
  return;
end

% Get the image type
Imtype = getparameter(Header, 'Image data', 1);


if strcmp(Imtype, 'Height') == 1  %for Height data
	Zscale = getparameter(Header, 'Z scale height', 1);
	if Zscale == inf
	  q = getparameter(Header, 'Z scale', 1);
	  i = q(1)+2;
	  Zscale = q(i);
	end

	Zatten = getparameter(Header, 'Z atten.', 1);
	Zmax = getparameter(Header, 'Z max', 1);
	Zsens = getparameter(Header, 'Z sensitivity', 1); 
	fact = ((Zscale*Zatten/65536) * (Zmax*2/65536*Zsens))/65536;
	Height = Image * fact;
	
elseif strcmp(Imtype, 'Deflection') == 1  %for deflection data
	% I don't know what is Graph range
	Grange = getparameter(Header, 'Graph range', 1);
	In1max = getparameter(Header, 'In1 max', 1);
	Insens = getparameter(Header, 'In sensitivity', 1);
	Insens = sscanf(Insens, '%f');
	Detectsens = getparameter(Header, 'Detect sens.', 1); 
	
	fact = ((Grange*In1max*2/65536) * (Insens/Detectsens))/65536;
	Height = Image * fact;

else
	message('Image data UNKNOWN.|Please check the functions:|   ind2height.m  and  height2ind.m||Data converted to grayscale');
    Height = (Image-min(min(Image)))/(max(max(Image))-min(min(Image)));
end
return