Repository for Multimedia & comp. visual. project

!! Mathlab toolbox are required to launch the project which are not include in standart matlab version !!

1. Configure matlab with mathab toolbox
2. Clone the repository

git clone https://github.com/czomo/DCT-LSB.git

3. Import project to matlab
4. In order to execute DCT watermarking enter

dct_wtmark('./image/<image which is gonna be watermarked>','./image_wmark/<patter used to watermarking>')

Example

dct_wtmark('./image/lena.jpg','./image_wmark/bing.jpg')

5. In order to execute LSB watermarking enter

dct_wtmark('./image/<image which is gonna be watermarked>','./image_wmark/<patter used to watermarking>')

Example

lsb_wtmark('./image/lena.jpg','./image_wmark.jpg')

• /image contains photos which are to watermarked
• /image_result outut directory with ready watermarked images
• /image_wmark pattern according to which protos are gonna be watermark
• psnr.m - psnr method which is responsible for computing peak signal-to-noise ratio
• dct_wtmark.m responsible for inserting and and processing DCT watermarking
• dct_exwmark.m- transforming image into binary form,adding significant bits and finally exporting it
• lsb_exwmark.m responsible for processing LSB waterwarking, file handling
• lsb_wtmark.m processing image acording to LSB method

• image is imported
• transforming image to gray scale imgage
• resizing image to resolution 512x512
• image is divided to 8x8 blocks
• watermark pattern is divaded in the same blocks of image
• image and patern are forming in row of 32 by 8x8 elements
• extracting watermark
• formating colums into 32x32 matrix
• inseritng colums back into blocks
• recombining blocks into full image
• displaying plot of image, watermark pattern, final resoult image