pstereogram

Synopsis

Description

pstereogram builds a stereogram image form a depth map im_in1 and a pattern image im_in2.

A stereogram is an image in which stereoscopic information are encoded. To look at a stereogram, one has to consider that the focal plane is behind the image.

            object           <-- PERCEIVED IMAGE (3D) { focal plane}
              |                   
             / \
            /   \
           /     \
        Object   Object      <-- ACTUAL PICTURE (Flat, 2D)
         /         \
        /           \        <-- LINES OF SIGHT FROM EACH EYE
       /             \
      (*)             (*)     <-- EYES

The depth map describes how deep each part of the scene is. It is represented as a gray scale image, where each pixel encodes the depth of the related point in the scene. Values belongs to [0..255] where 0 is the minimum distance and 255 the maximum distance. The depth image can be built from the projection of a 3D image to 2D image.

The pattern image is used as a tile image. It must be at least as wide as the maximum stereo separation otherwise there is a problem (for example 64x64).

Inputs

• im_in1: a 2D gray level image (Img2duc). Each pixel encodes the distance from the observer of the related point in the scene.
• im_in2: a 2D color image (Imc2duc).

Outputs

• im_out: a 2D color image (Imc2duc).

Result

Returns SUCCESS or FAILURE.

Examples

Builds c.pan from the depth image a.pan and the tile image b.pan. a.pan is builds from the 3D image a3d.pan:

   pgraylevel2depth 50 a3d.pan a.pan
   pstereogram a.pan b.pan c.pan

See also

C++ prototype

Version française

Construction d'une image stéréogramme couleur.