7 results about "Pixel aspect ratio" patented technology

The disclosed embodiments disclose a method and apparatus for processing image data, wherein the processing method includes: processing a first image and a second image using a first neural network to obtain a homography matrix; determining, based on the homography matrix, mapped image features of features of the first image; fusing the mapped image features with features of the second image to obtain fused image features; and processing the fused image features using a second neural network to obtain a first pixel aspect ratio of the second image. The disclosed embodiments can obtain a dense and accurate pixel aspect ratio, thereby assisting in 3D scene modeling.

A method of signalling a signal adjustment when encoding an input signal using a hierarchical coding scheme to manage a display aspect ratio. The hierarchical coding scheme comprises encoding a downsampled version of the input signal using a first encoding method to produce a first encoded signal. When the downsampling operation of the hierarchical coding scheme is a non-square downsampling operation, the method signals an adjustment to cause a pixel aspect ratio of the first encoded signal to be adjusted by a scaling factor, wherein the scaling factor is determined from the non-square downsampling operation. Additionally, correction is applied in an enhancement level of the hierarchical coding scheme to ensure that the signalled change of pixel aspect ratio does not lead to unintended consequences in the enhanced reproduction at a decoder-side.

The invention relates to a spectrometer (10) comprising an aperture (13) configured to receive a source light beam, a first optical system configured to receive the source light beam and form a collimated light beam directed to a diffraction grating, the diffraction grating configured to receive the collimated light beam and form a diffracted light beam, a second optical system configured to form an image of the diffracted light beam on an image sensor. According to the invention, the image sensor is a CMOS sensor comprising pixels (34) arranged in N rows, the pixel rows being oriented in a direction inclined by an angle alpha relative to a spectral diffraction direction of an image of the diffracted beam, where alpha is less than 10 degrees, N is at least 3, and each pixel having a height and a width defining a pixel aspect ratio greater than 2.

File format concepts for video files are described. It is proposed to that descriptive data of a file indicates whether a parameter set for a track of a file is forwarded when jointly decoding a sub-stream of the track and a further track, and / or that a file includes, for a sub-stream of a video stream signaled in the file, an alternative parameter set to a parameter set for fully decoding the track, the alternative parameter set being for decoding the sub-stream, so as to allow for switching between multiple tracks of a file, and / or that step-wise stream access pictures of a track of a file are marked as stream access point pictures for accessing the track, and / or that a temporal length within which a decoder refresh in case of a joint decoding of sub-streams distributed over multiple tracks is indicated in a file, and / or that a file provides information from which it is derivable whether a pixel aspect ratio varies.

File format concepts for video files are described. It is proposed to that descriptive data of a file indicates whether a parameter set for a track of a file is forwarded when jointly decoding a sub-stream of the track and a further track, and / or that a file includes, for a sub-stream of a video stream signaled in the file, an alternative parameter set to a parameter set for fully decoding the track, the alternative parameter set being for decoding the sub-stream, so as to allow for switching between multiple tracks of a file, and / or that step-wise stream access pictures of a track of a file are marked as stream access point pictures for accessing the track, and / or that a temporal length within which a decoder refresh in case of a joint decoding of sub-streams distributed over multiple tracks is indicated in a file, and / or that a file provides information from which it is derivable whether a pixel aspect ratio varies.

The present invention relates to an optical spectrometer (10) comprising: an aperture (13) configured to receive a light source beam; a first optical system configured to receive the light source beam and form a collimated light beam directed toward a diffraction grating; a diffraction grating configured to receive the collimated light beam and form a diffracted light beam; and a second optical system configured to form an image of the diffracted light beam on an image sensor. According to the present invention, the image sensor is a CMOS sensor comprising pixels (34) arranged in N rows oriented in a direction tilted by an angle alpha with respect to the spectral diffraction direction of the image of the diffracted light beam, where alpha is less than 10 degrees, N is at least 3, and each pixel has a height and width that define a pixel aspect ratio greater than 2.

A method of signalling a signal adjustment when encoding an input signal using a hierarchical coding scheme to manage a display aspect ratio. The hierarchical coding scheme comprises encoding a downsampled version of the input signal using a first encoding method to produce a first encoded signal. When the downsampling operation of the hierarchical coding scheme is a non-square downsampling operation, the method signals an adjustment to cause a pixel aspect ratio of the first encoded signal to be adjusted by a scaling factor, wherein the scaling factor is determined from the non-square downsampling operation. Additionally, correction is applied in an enhancement level of the hierarchical coding scheme to ensure that the signalled change of pixel aspect ratio does not lead to unintended consequences in the enhanced reproduction at a decoder-side.