US 7,116,720 B2Granted

Device for correcting still image errors in a video signal

AssigneeThomson Licensing

InventorThomas Leonard

Life of this patent

Estimating the term…

Loading patent…

Abstract

In a device for correcting picture instabilities in film scanners, at least one motion vector describing the motion of at least one part of the picture between two scanned pictures is derived and an actuator situated in the path of the video signals obtained by scanning is controlled in a manner dependent on said motion vector, in each case the at least one motion vector of successive pictures being fed to a filter, the filter containing a plurality of registers, to which the at least one motion vector can be fed and which are assigned a state variable which is set if the respective register content is valid, the contents of the registers with a set state variable being accumulated by a new motion vector when the latter arrives, the state variable being reset if the state variable was set before the arrival of the new motion vector and the content of the respective register exceeds a predetermined threshold, the content of one of the registers with a reset state variable being set to zero and the state variable being set to one and an average value being formed from the contents of the registers with a set state variable, said average value being fed to the actuator with an opposite sign.

Claims4

Dependent claims

An apparatus for correcting picture instabilities in a video signal, having a device for deriving a correction signal in a manner dependent on deviations in successive pictures of the video signal to be corrected, having an actuator, which has an input for receiving the video signal to be corrected, a control input for feeding in the derived correction signal and an output for outputting the corrected video signal, having a filter, which receives, at art input a motion vector signal describing the vector of a motion between successive pictures, which derives a correction signal from the received motion vector signal and outputs it at an output, wherein

in that in each case at least one motion vector of the successive pictures is fed to the filter,
in that the filter contains a plurality of registers to which at least one motion, vector can be fed and which are assigned a state variable if the respective register content is valid,
in that the contents of the registers with a set state variable are accumulated by a new motion vector when the latter arrives,
in that the state variable is reset it the state variable was set before the arrival of the new motion vector and the content of the respective register exceeds a predetermined threshold,
in that the content of one of the registers with a reset state variable is set to zero and the state variable is set to one, and
in that an average value is formed from the contents of the registers with a set state variable, said average value being fed to the actuator with an opposite sign.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/398,332Filed 29 Sep 2001
Published: US 2004/0028136 A112 Feb 2004
Granted: 3 Oct 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04N 23/682
For stable pick-up of the scene, e.g. compensating for camera body vibrations: vibration or motion blur correction
H04N 5/253
Studio circuitry; Studio devices; Studio equipment: picture signal generating by scanning motion picture films or slide opaques, e.g. for telecine
H04N 23/68
Control of cameras or camera modules: for stable pick-up of the scene, e.g. compensating for camera body vibrations
H04N 23/6811
Motion detection: based on the image signal