imStacks: cleanup image reading functions

Author: dlegland

matImage/imStacks/imFileInfo.m

@@ -38,4 +38,3 @@
         error(['Can not manage file ending by ' ext]);
 end
 
-    

matImage/imStacks/metaImageInfo.m

@@ -146,9 +146,9 @@
 
     % extract each possible tag
     switch tag
-        % First, parse required tags
+        % First parse mandatory tags
         case 'NDims'
-            % number of dimensions. Used for initializing data structure
+            % number of dimensions. Used for initializing data structure.
             nd = parseInteger(string);
             info.NDims = nd;
 
@@ -262,7 +262,7 @@
         tline = fgetl(f);
     end
 
-elseif ~isempty(strfind(string, ' '))
+elseif contains(string, ' ')
     % If filename contains spaces, it is parsed to extract indices
     C = textscan(string, '%s %d %d %d');
     pattern = C{1}{1};

matImage/imStacks/vgiStackInfo.m

@@ -95,7 +95,7 @@
         elseif strcmpi(key, 'bitsperelement')
             info.bitDepth = str2double(value);
             if info.bitDepth ~= 16
-                error('Only 16 bits per element are currently supported, not %d', bitDepth);
+                error('Only 16 bits per element are currently supported, not %d', info.bitDepth);
             end
 
         elseif strcmp(key, 'Name')