[MATLAB Image Processing] learning notes: Reading hexadecimal RGB documents into color pictures

The jpgimage is decoded in JPEG decoding. The decoded data is divided into three colors: RGB. The three colors (in hexadecimal format) are stored in red in three files. dat, green. dat, blue. dat; use MATLAB to restore the three-color data into an image.

Here, only the red color is processed, and the other two colors are processed in a similar way.

Here we decode a jpg image of 1080*1920.

The red. dat file stores hexadecimal data.

For example, only 12 data records are listed here, with a total of 1080x1920 data records.

MATLAB sourceProgramAs follows:

RGB

 1 Clear;
 2 RGB = imread ( '  Blank.jpg  ' );
 3 Red = zeros ( 1080 ,1920 );
 4 A = textread ( '  Red. dat  ' , '  % S  ' ) '  ;  
  5 B = hex2dec ();
 6 C = uint8 (B );
 7   For I = 1 : 1080 
 8       For J = 1 : 1920 
 9 M = 1920 * (I- 1 ) + J;
 10 Red (I, j) = C (m );
 11 End
 12 End
13  
 14 RGB (:,:, 1 ) = Red;
 15 RGB (:,:, 2 ) = 0 ;
 16 RGB (:,:, 3 ) = 0 ;
 17 JPEG = imread ( '  Picture.jpg  ' );
18 Subplot ( 1 , 2 , 1 ), Imshow (JPEG );
 19 Subplot ( 1 , 2 , 2 ), Imshow (RGB );

Row 3: blance.jpg is an empty 2nd * 1080 image.

Row 3rd: creates a two-dimensional array red to save the R value.

Row 4th: Read the data in the hexadecimal red. dat file and put it in.

Row 3: Convert hexadecimal to hexadecimal.

Row 7-12: The read data is placed in the two-dimensional array red.

Row 3: Set the red weight.

Row 3: Set the green component. Set this parameter to 0;

Row 3: Set the blue component. Set this parameter to 0;

Row 3: Read the original image.

Line 18-19: displays the original image and decoded images with only the red weight.

 

Running result:

The left side is the original image, and the right side is the decoded image containing only the red weight.