1    package face; 
2     
3     interface ImageFileFormat { 
4        /** 
5         * Get the height of the PPM image. 
6         * 
7         * @return the height of the image. 
8         */ 
9        public int getHeight(); 
10    
11       /** 
12        * Get the width of the PPM image. 
13        * 
14        * @return  the width of the image. 
15        */ 
16       public int getWidth(); 
17    
18       /** 
19        * Get the data as byte array. Data is of any type that 
20        * has been read from the file (usually 8bit RGB) 
21        * 
22        * @return  The data of the image. 
23        */ 
24       public byte[] getBytes(); 
25    
26       /** 
27        * Get the data as double array. Data is of any type that 
28        * has been read from the file (usually 8bit RGB put into an 64bit double) 
29        * 
30        * @return  The data of the image. 
31        */ 
32       public double[] getDouble(); 
33   } 
34