[attachment=11582]
2-D IMAGE MORPHING
What is image morphing?
Use of morphing in movies
Techniques for image morphing
Cross-dissolve
Field morphing
Mesh morphing
Cross-Dissolve
Field Morphing
Field Morphing - Transformation with One Pair of Lines
Transformation with
One Pair of Lines
Transformation with
One Pair of Lines
Original image (UL), rotated image (UR), translated image(LL), scaled image (LR)
Transformation with
Multiple Pairs of Lines
Weighted average of single pair version
a – smoothness of warping
b – falloff of strength with distance
p – rewarding longer lines
Transformation with
Multiple Pairs of Lines
For each pixel X in destination
DSUM=(0,0)
weightsum=0
For each line Pi Qi
Calculate u,v based on Pi Qi
Calculate X’I based on u,v and Pi’ Qi’
Calculate displacement Di=Xi’-X
Calculate weight
DSUM+=Di*weight; weightsum+=weight
X’ = X+ DSUM/weightsum
destinationImage(X) = SourceImage(X’)
Transformation with
Multiple Pairs of Lines
“Lines” are actually line segments
Distance from a pixel to a line is
abs(v) if 0<u<1
Distance from P if u<0
Distance from Q if u>0
Transformation with
Multiple Pairs of Lines
Not possible to do uniform scaling or shear
Transformation with
Multiple Pairs of Lines
Advantages
Expressive
Adding control points is easy
Disadvantages
All line segments need to be referenced for each pixel
Line segments have global impact
Mesh Warping
Source and target images are meshed
The meshes for both images are interpolated
The intermediate images are cross-dissolved
Mesh Warping
for each frame f do
Linearly interpolate mesh M, between Ms and Mt
warp Images to I1, using meshes Ms and M
warp Imaget to I2, using meshes Mt and M
Linearly interpolate image I1 and I2
end
Mesh Warping
Mesh Warping
Hard to fit the mesh in images
All control points affect the warping equally
Not enough control in certain areas when needed
Transition Control –
Uniform Metamorphosis
Transition Control –
Non-uniform Metamorphosis
Polymorph

Presented By
Biswa Ranjan Swain

---

[attachment=11973]
INTRODUCTION
 MORPHING IS DERIVED FROM ‘METAMORPHOSIS’.
 MORPHING IS A SPECIAL EFFECT IN MOTION PICTURES AND ANIMATIONS THAT CHANGES ONE IMAGE INTO ANOTHER THROUGH A SEAMLESS TRANSITION.
 Since the early 1990s, Cross Fading Technique has been replaced by computer software to create more realistic transitions.
 One great progress in morphing was the usage of computer graphics to model and render images, which transform over time.
WARPING
 It is the process of digitally manipulating an image.
 Warping may be used for correcting image distortion as well as for creative purposes.
 Warping can be done either by:
> Forward Mapping:- we scan the source image pixel wise and copy them to the destination image at appropriate positions
> Backward Mapping:- we go through the destination image pixel wise and sample the correct pixel from the source image.
THIS IS A TECHNIQUE OF IMAGE WRAPPING
IMAGE MORPHING IS CLASSIFIED INTO 3 TYPES
 FIELD MORPHING.
 FACE MORPHING
 VIEW MORPHING
 It is called field morphing because it is based upon fields of influence surrounding two-dimensional control primitives.
 In this morphing technique we first warp the two images so that they have the same "shape", and then cross dissolve the resulting images.
 feature lines are selected interactively.
Reverse Mapping technique is used. The advantage of this algorithm is that every pixel of the destination image gets set to something appropriate. This deformation method will be used with field morphing.
Algorithm
• N feature lines are selected in the source and destination images interactively.
• A pair of corresponding lines in the source and destination images defines a coordinate mapping from the destination image pixel coordinate to the source image pixel coordinate.
• Each feature line has a corresponding influence around the neighboring pixels
• In this technique the face of the source image is replaced by the face of the destination image using the Adobe Photoshop Software.
• This technique enhances the user’s creativity in the field of animation and and modeling.
• This technique is sometimes used to combine adult pornography and non-pornographic images of children into child pornography. The Child Pornography Prevention Act of 1996 was passed to criminalize these morphed images

plzzzzzzzzz.......... can u provide me report n more informationa abt the topic plzzzzz....

to get information about the topic 2-D IMAGE MORPHING full report refer the page link bellow

http://studentbank.in/report-2-d-image-morphing