Method of constructing a depth map of a scene and/or a fully focused image
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsSimon Emberger, William Guicquero
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Abstract
A method of generating, by means of a processing device, a depth map and/or a fully focused image of a scene, from a series of images of the scene taken under a same viewing angle but with a different focusing, the method including the steps of: a) for each position of a pixel in the series of images, searching for an extremum of the pixel value in the series of images; and b1) assigning to said pixel position a depth value which is a function of the rank, in the series of images, of the image where the extremum has been identified at step a) to construct a depth map of the scene, and/or b2) assigning to said pixel position the value of the extremum identified at step a) to construct a fully focused image of the scene.
Claims21
A method of generating, by means of a signal processing device, a depth map or a fully focused image of a scene, from a series of images of the scene, each comprising a same number of pixels, the images being taken under a same viewing angle but with a different focusing, the method comprising, for each position of a pixel in the series of images, the steps of:
- a) searching for an extremum of the pixel value or of a derivative of the pixel value in the series of images by only taking into account the values of the pixel at the considered position in the series of images;
- b) assigning to said position of the pixel in the series of images
- a first value which is a function of the rank, in the series of images, of the image where the extremum has been identified at step a) to construct the depth map of the scene;
- c) assigning to said position of the pixel in the series of images a third value representative of the relevance of the first value assigned to the pixel at step b), the third value being determined by only taking into account the values of the considered pixel in the series of images;
- and
- d) supplying an output value comprising the first value and the third value assigned to the pixel.
A signal processing device configured for generating a depth map of a scene, from a series of images of the scene, each comprising a same number of pixels, the images being taken under a same viewing angle but with a different focusing, the signal processing device being configured for implementing, for each position of a pixel in the series of images, the steps of:
- a) searching for an extremum of the pixel value or of a derivative of the pixel value in the series of images by only taking into account the values of the pixel at the considered position in the series of images;
- b) assigning to said position of the pixel in the series of images;
- a first value which is a function of the rank, in the series of images, of the image where the extremum has been identified at step a) to construct the depth map of the scene;
- c) assigning to said position of the pixel in the series of images a third value representative of the relevance of the first value assigned to the pixel at step b), the third value being determined by only taking into account the values of the considered pixel in the series of images;
- and
- d) supplying an output value comprising the first value and the third value assigned to the pixel.
A method of generating, by means of a signal processing device, a fully focused image of a scene, from a series of images of the scene, each comprising a same number of pixels, the images being taken under a same viewing angle but with a different focusing, the method comprising, for each position of a pixel in the series of images, the steps of:
- a) searching for an extremum of the pixel value or of a derivative of the pixel value in the series of images by only taking into account the values of the pixel at the considered position in the series of images;
- b) assigning to said position of the pixel in the series of images a second value equal to the value of the pixel in the image where the extremum has been identified at step a) to construct a fully focused image of the scene;
- c) assigning to said position of the pixel in the series of images a third value representative of the relevance of the second value assigned to the pixel at step b), the third value being determined by only taking into account the values of the considered pixel in the series of images;
- and
- d) supplying an output value comprising the second value and the third value assigned to the pixel.
A signal processing device configured for generating a fully focused image of a scene, from a series of images of the scene each comprising a same number of pixels, the images being taken under a same viewing angle but with a different focusing, the signal processing device being configured for implementing, for each position of a pixel in the series of images, the steps of:
- a) searching for an extremum of the pixel value or of a derivative of the pixel value in the series of images by only taking into account the values of the pixel at the considered position in the series of images;
- b) assigning to said position of the pixel in the series of images a second value equal to the value of the pixel in the image where the extremum has been identified at step a) to construct a fully focused image of the scene;
- c) assigning to said position of the pixel in the series of images a third value representative of the relevance of the second value assigned to the pixel at step b), the third value being determined by only taking into account the values of the considered pixel in the series of images;
- and
- d) supplying an output value comprising the second value and the third value assigned to the pixel.
Dependencies are inferred from the claim text.