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Overall Goal:
To learn handling diffuse scenes, directional lights and impossible objects. Impossible objects will
be key idea in all of our proxy shape reconstructions. Therefore, this particular project is very important
for the rest of the class. using this idea, we can ignore, i.e. embed, camera parameters into proxy shapes.
Synopsis:
This project is intended for you to deal with compositing usual artificial objects into digital images
of scenes that include mostly diffuse surfaces & directional light.
Project Description:
You will add an impossible object into the scene in previous project.
Note that even real objects can be impossible. See the following youtube videos:
video 1 and
video 2. There are many impossible shapes
and all of them can be created phsyically (or artificially) that looks impossible only from one angle.
In this case, we will see it only one angle and shadow will reveal that it is impossible..
Project Requirements:
- Be sure that the object is impossible. Note that even real objects can be impossible
- Shadow of the impossible object must look believable.
- In other words,
shadow colors must match other shadows in the scene.
Shadow shape must conform other shapes in the scene.
Bonus:
- Move the light. The whole scene will be relighted. If your previous project is successful,
this is trivial.
- Create an animation using a similar tricks shown in video 2.
Project Submission:
Please upload your images to project website for critical review and class discussion.
General Checklist for projects :
For each project, we will check the following items.
- Qualitative matching local camera position and orientation
- Qualitative Consistent matching of artificial object with the lights and objects in the original image
(each subject counted one and they depend on the problem.)
- For diffuse parts of artificial object
- Shading
- Colors
- Ambient illumination
- Contact shadows
- Specular/glossy parts of artificial object
- Specular reflection of light
- Reflection of environment
- Transparent/translucent parts of artificial object
- Refraction of light
- Refraction of environment
- Shadow of artificial object
- Shadow colors
- Shadow shape
- Reflection of artificial object
- Shape of reflection
- Shading of reflection
- Colors of reflected object
- Ambient illumination of reflected object
- Contact shadows
- Refraction of artificial object
- Shape of refraction
- Shading of refraction
- Noise on refraction
- Ambient illumination on refracted object
- Refraction of contact shadows
- Inclusion of opaque regions
- Additional effects to be considered
- Scatttering
- Subsurface scattering
- Consistent noise with original
- Halo avoidance
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