US 5,854,659 A · Apparatus and method for generating a processed video picture by interpolating intensities of an original video picture

Abstract

In a process for processing a first video picture with image points in m.sub.1 lines, whose image points in the l.sub.1 -th line have an intensity I.sub.1 (t, l.sub.1) depending on a parameter t, in particular depending on time, for generating a second video picture with m.sub.2 lines, the respective intensity I.sub.2 (t, l.sub.2) of an image point in the l.sub.2 -th line of the second video picture is interpolated from the intensities of the image points of the first video picture I.sub.1 (t, l.sub.1), wherein I.sub.2 is obtained according to the following equation: I.sub.2 (t,l.sub.2)=Max(J(t,l.sub.2)+.DELTA.;0), where the values J, with respect to the lines, represent discretized values of a signal waveform given by the sampling theorem and in which an offset .DELTA. is provided for partial compensation of negative intensities of the discretized signal waveform J so that the interpolation with respect to the lines is effected with A as a freely selectable amplitude of positive value according to the following equation: ##EQU1## An apparatus contains corresponding circuit parts for generating the second video picture according to the indicated process.

Claims17

Dependent claims

interpolating the respective intensity I.sub.2 (t, l.sub.2) of an image point in the l.sub.2 -th line of the second video picture from the intensities of the image points of the first video picture I.sub.1 (t, l.sub.1);
and
obtaining I.sub.2 according to the following equation:
I.sub.2 (t,l.sub.2)=Max(J(t,l.sub.2)+.DELTA.;0),
where the values J, with respect to the lines, represent discretized values of a signal waveform given by the sampling theorem and in which an offset .DELTA. is provided for partial compensation of negative intensities of the discretized signal waveform J so that the interpolation with respect to the lines is effected with A as a freely selectable amplitude of positive value according to the following equation:
##EQU9##

3 more elements

In an apparatus for processing a first video picture with image points in m.sub.1 lines, whose image points in the l.sub.1 -th line have an intensity I.sub.1 (t, l.sub.1) depending on a parameter t, in particular depending on time, for generating the image points of a second video picture with m.sub.2 lines, an improvement comprising:

adding circuit means for interpolating the intensity I.sub.2 (t, l.sub.2) of an image point of the second video picture in the l.sub.2 -th line from the intensities I.sub.1 (t, l.sub.1) of the image points of the first video picture in that the intensities I.sub.1 of the image points of the first video picture are added so as to be weighted over a given quantity of lines in order to generate a signal waveform J(t, l.sub.2) for a line l.sub.2 of the second video picture in accordance with the equation ##EQU11## at an amplitude A which is fixed for the second video picture and;
suppression circuit means which leaves positive values of J substantially unchanged and suppresses negative values of J and having an output for reproducing the intensities I.sub.2 (t, l.sub.2) of the image points of the second video picture.

Dependencies are inferred from the claim text.

Apparatus and method for generating a processed video picture by interpolating intensities of an original video picture

Life of this patent

Apparatus and method for generating a processed video picture by interpolating intensities of an original video picture

Life of this patent

Abstract

Claims17