Determination of the image depth map of a scene
AssigneesCommissariat A L'energie Atomique Et Aux Energies Alternatives, Centre National De La Recherche Scientifique
InventorsJerome Dias, David Alleysson, Stephane Getin
Life of this patent
Estimating the term…
Abstract
A method for estimating the image depth map of a scene, includes the following steps: providing (E1) an image, the focus of which depends on the depth and wavelength of the considered object points of the scene, using a longitudinal chromatic optical system; determining (E2) a set of spectral images from the image provided by the longitudinal chromatic optical system; deconvoluting (E3) the spectral images to provide estimated spectral images with field depth extension; and analyzing (E4) a cost criterion depending on the estimated spectral images with field depth extension to provide an estimated depth map.
Claims20
A method for estimating an image depth map of a scene, which comprises:
- providing an image in which the focus depends on a depth and wavelength of considered object points of the scene, using a longitudinal chromatic optical system,
- determining a set of spectral images from the image provided by the longitudinal chromatic optical system,
- deconvoluting the spectral images in order to provide estimated spectral images with extended depth of field, and
- analyzing a cost criterion that is dependent on the estimated spectral images with extended depth of field, in order to provide an estimated depth map {circumflex over (Z)}(x,y) of an actual depth Z(x, y) , where Z is the actual depth, of the scene, and x and y are coordinates of the actual scene.
A device for estimating the image depth map of a scene, which comprises:
- a longitudinal chromatic optical system for providing an image in which the focus depends on the depth and wavelength of the considered object points of the scene;
- a spectral image sensor for receiving the image provided by the longitudinal chromatic optical system and for providing a set of spectral images;
- and
- a computer, the computer being configured to
- deconvolute the spectral images in order to provide estimated spectral images with extended depth of field, and
- analyze a cost criterion that is dependent on the estimated spectral images with extended depth of field, in order to provide an estimated depth map {circumflex over (Z)}(x,y) of an actual depth Z(x, y), where Z is the actual depth, of the scene, and x and y are coordinates of the actual scene.
Dependencies are inferred from the claim text.