digital watermarking and steganography

... significant progress in digital watermark- ing; and the field of steganography has witnessed increasing interest since the terrorist events of September 11, 2001. Digital watermarking and steganography ... text using small holes. Digital Watermarking and Steganography Example Watermarking Systems In this book, we present a number of example watermarking systems to il...

Ngày tải lên: 03/07/2014, 16:06

... Voyatzis, Nikolaidis and Pitas (1998), Ruanaidh, Dowling and Boland (1996), Ruanaidh and Pun (1997), Hsu and Wu (1996), Ruanaidh, Boland and Dowling (1996), Hernandez, Amado and Perez-Gonzalez ... performance evaluation for audio watermarking, human auditory system, digital watermarking for PCM audio, digital watermarking for wav-table synthesis audio, and digital wa...

Ngày tải lên: 07/03/2014, 11:20

... Control(PC)/ Command(Mac)-h on the keyboard to hide the vector mask from view. If you want to show it, just type the same keyboard command. When the mask is hidden, this keyboard command reveals it and ... targeted. Go ahead and apply numerous instances of one Brush preset. Alter the angle, color, and the size as you see fit. In the Brushes palette, there is a small circle and...

Ngày tải lên: 17/10/2013, 20:15

... One: Drawing and Painting 7 6 Expand your group and target the figure outlines layer in the Layers palette. Select the Magic Wand tool. Ensure that the Contiguous option is enabled and that the ... shortcut for inverting an image is Control(PC)/Command(Mac)-I and that for inverting a selection is Control(PC)/Command(Mac)-Shift-I. Remembering when and when not to hold down the...

Ngày tải lên: 20/10/2013, 11:15

... contrived and the feeling of abandon is rarely even attempted. The recklessness and abandon that the paint slingers take for granted is something that we Photoshop artists must carefully plan and ... foreground and background colors to produce its results; so in order to create a black -and- white effect, we need to set the foreground and background colors to their default blac...

Ngày tải lên: 20/10/2013, 11:15

... the scan1.jpg file. Select all and copy. Return to the working file and paste the copied art in as a new layer. Enable the Free-Transform command to resize and position the pasted art based ... you go this route, hold up a piece of onionskin paper and look at the fine random and fibrous texture within it. Draw a few lines on it and look at how different each stroke is from...

Ngày tải lên: 24/10/2013, 10:15

... flower to select it. Choose SelectϾ Modify Ͼ Expand from the menu and expand the selection by 1 pixel. Fill the expanded selection with black. Deselect and Alt(PC)/Option(Mac)-click on the layer’s ... Free- Transform and reposition the arm to the other side of the suit. Add a mask to the layer and then, while the layer mask is targeted, draw a rough polygonal selection around the...

Ngày tải lên: 24/10/2013, 10:15

... corners and midpoint handles of the bounding box to increase the eye in size and alter the proportion so that it is larger and wider than the original. Press Enter on the keyboard and then ... imagery as well as work with color and texture, layer stacking and duplication is essentially the nuts and bolts of what we’re doing here. Visualization and implementation Apa...

Ngày tải lên: 28/10/2013, 17:15

... details and signs of age to the right side of her face. Work on the nose area, and add more pores and wrinkles. Build up masked layers and remember to use color range, multiply, and the darken ... the Magic Wand to select a number of random squares from the grid layer. Target the top layer in the group and then create a new hue/saturation adjustment layer. Adjust the hue...

Ngày tải lên: 28/10/2013, 17:15

... subtracting and combining , 27 third character , 33 – 34 tongue and forehead , 29 tool choice tip , 25 tools and techniques , 22 unique characters , 39 for color , 210 – 212 and dra wings ... mode to hard light and reduce the opacity to 61%. Duplicate the layer, change the blending mode to luminosity, and increase the opacity a little. Duplicate this layer too, a...

Ngày tải lên: 07/11/2013, 12:15