Back to results
US 2016/0255283 A1Published application
Method for differentiating between background and foreground of scenery and also method for replacing a background in images of a scenery
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsWolfgang Vonolfen, Rainer Wollsiefen
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for differentiating between background and foreground in images or films of scenery recorded by an electronic camera. The invention relates in addition to a method for replacing the background in recorded images or films of scenery whilst maintaining the foreground.
Claims20
1-29. (canceled)
A method for differentiating between background and foreground of a scenery in images recorded by an electronic camera,
- the background showing an arbitrary image coded with a coding such that the image is visible for a direct observer of the background,
- and the background being differentiated from the non-coded foreground in a signal produced by an image sensor, recording the images, of the camera by means of the coding,
- wherein the coding comprises the background displaying the image only with colours selected from one or at least two, ranges of the visible spectrum at a spacing from each other, and light emanating from the background running through a colour filter, or an interference filter, before impinging on the image sensor, which colour filter filters out or tones down these ranges of the visible spectrum, and letting other ranges of the visible spectrum pass through without being toned down.
A method for differentiating between background and foreground of a scenery in images recorded by an electronic camera,
- the background showing an arbitrary image coded with a coding such that the image is visible for a direct observer of the background,
- and the background being differentiated from the non-coded foreground in a signal produced by an image sensor, recording the images, of the camera by means of the coding
- characterised in that the coding comprises the image being represented in a grid of coloured dots on a backdrop, the coloured dots respectively together with the backdrop surrounding them composing the colour of the image, and
- a colour filter being disposed in front of the image sensor, which colour filter tones down the colours of the coloured dots and preferably lets through the colours of the backdrop without being toned down, the background being differentiated from the foreground by means of keying, preferably chroma-keying, on the colour of the backdrop.
1 more element
A method for differentiating between background and foreground of a scenery in images recorded by an electronic camera,
- the background showing an arbitrary image coded with a coding such that the image is visible for a direct observer of the background,
- and the background being differentiated from the non-coded foreground in a signal produced by an image sensor, recording the images, of the camera by means of the coding,
- wherein the coding comprises the background radiating only colours selected from at least one or at least two, ranges of the visible spectrum at a spacing from each other in the spectrum, the light emanating from the scenery running through a colour filter before impinging on the image sensor, which colour filter tones down those ranges of the visible spectrum from which the colours of the image are selected, and letting through ranges of the visible spectrum situated between these ranges without being toned down, the background being differentiated from the foreground by keying onto the ranges of the spectrum toned down by the colour filter in front of the image sensor.
A method for differentiating between background and foreground of a scenery in images recorded by an electronic camera,
- the background showing an arbitrary image coded with a coding such that the image is visible for a direct observer of the background,
- and the background being differentiated from the non-coded foreground in a signal produced by an image sensor, recording the images, of the camera by means of the coding,
- wherein the coding comprises the background radiating, letting through or reflecting electromagnetic radiation of at least one non-visible spectral range and a conversion device being disposed in front of the image sensor, which converts the non-visible electromagnetic radiation into visible light which is detected by the image sensor.
A method for differentiating between background and foreground of a scenery in images recorded by an electronic camera,
- the background showing an arbitrary image coded with a coding such that the image is visible for a direct observer of the background,
- and the background being differentiated from the non-coded foreground in a signal produced by an image sensor, recording the images, of the camera by means of the coding,
- wherein the coding comprises the background radiating or reflecting polarised light only of one specific polarisation direction or polarisation rotation,
- the light emanating from the scenery running through a colour filter and a polarisation filter before impinging on the image sensor, which filter is orientated such that it filters out light of that polarisation which is radiated and reflected from the background and differentiation of the background from the foreground being effected by means of keying on darker regions of the image recorded by the image sensor which have no colour tone of the colour filter, the light emanating from the scenery preferably firstly running through the colour filter and subsequently the polarisation filter.
1 more element
Dependencies are inferred from the claim text.