Grey Level Images of Planar Scenes

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A short presentation...

Here are the sequences containing grey level images or planar scenes. These images can be downloaded in PGM format, and are shown here in a reduced sizea and GIF format.

The sequences are sorted with respect to the variation that occurs between the shots. The other parameters which are not described as varying are stable... as far as we could control the environment.

Different kinds of variations

• Variations of a single light source (g2_1l)
• Variations of two light sources (g2_2l)
• Variation of a single light source, while the scene is also illuminated by another diffuse light source (g2_al)
• Variation of internal camera parameters (g2_ip)
• Variation of the viewpoint (external camera parameters) (g2_vp)
• Variation of illumination and viewpoint (g2_iv)
• Variation of the scene composition (g2_sc)
• Variations of several parameters together (g2_sp)

The image sequences

Variations of a single light source (g2_1l)

• Variation of the light intensity. (g2_1l_li)
• Variation of the light color. (g2_1l_lc)
• Variation of the light position. (g2_1l_lp)

Variations of two light sources (g2_2l)

• Variation of the light intensity of one of the sources. (g2_2l_1i)
• Variation of the light color of one of the sources. (g2_2l_1c)
• Variation of the light position of one of the sources. (g2_2l_1p)
• Variation of the light intensity of both sources. (g2_2l_2i)
• Variation of the light color of both sources. (g2_2l_2c)
• Variation of the light position of both sources. (g2_2l_2p)

Variation of a single light source, while the scene is also illuminated by another diffuse light source (g2_al)

• Variation of the light intensity. (g2_al_li)
• Variation of the light color. (g2_al_lc)
• Variation of the light position. (g2_al_lp)

Variation of internal camera parameters (g2_ip)

• Variation of aperture (g2_ip_ap)
• Variation of focusing (g2_ip_fo)
• Zooming (g2_ip_zo)

Variation of the viewpoint (external camera parameters) (g2_vp)

1. The scene is orthogonal to the rotation axis (for rotations) or to the optical axis of the camera (for translations).
   • Translation orthogonal to the optical axis (g2_vp_tp)
   • Translation along the optical axis or zooming (g2_vp_tz)
   • Other linear translations (g2_vp_tr)
   • Other translations (g2_vp_tc)
   • Rotation around the optical axis (g2_vp_rz)
   • Rotation around an fixed axis going through the optical center (g2_vp_ro)
   • Rotation around an axis of the scene intersecting the optical axis (g2_vp_ra)
   • Rotation around an axis of the scene not intersecting the optical axis (g2_vp_rb)
2. The scene is not orthogonal to the rotation axis (for rotations) or to the optical axis of the camera (for translations).
   • Translation orthogonal to the optical axis (g2_vp_TP)
   • Translation along the optical axis or zooming (g2_vp_TZ)
   • Other linear translations (g2_vp_TR)
   • Other translations (g2_vp_TC)
   • Rotation around the optical axis (g2_vp_RZ)
   • Rotation around an fixed axis going through the optical center (g2_vp_RO)
   • Rotation around an axis of the scene intersecting the optical axis (g2_vp_RA)
   • Rotation around an axis of the scene not intersecting the optical axis (g2_vp_RB)
3. Other motions with no orthogonality considerations
   • Rotation around the optical center (g2_vp_rc)
   • Rotation around a point of the scene (g2_vp_rp)
   • General motion (g2_vp_om)

Variation of illumination and viewpoint (g2_iv)

Variation of the scene composition (g2_sc)

Variations of several parameters together (g2_sp)