Patent ID: 8238691

Claim:
A method of image analysis, the method comprising: receiving a video comprising images; processing one of the images in the video to determine whether the image is a picture image representing a picture or a non-picture image resulting from a fault condition, the non-picture image being statistically stationary, the image being represented by a set of image data samples, the processing comprising determining a first correlation measure depending on the correlation of a first subset of image data samples from the set of image data samples with at least a second subset of image data samples from the set of image data samples, the image data samples of the second subset being offset spatially from respective image data samples of the first subset; determining a second correlation measure depending on the correlation of the first subset of image data samples with a mean image data sample value; and determining a positive result that the image is a non-picture image that is statistically stationary based on a comparison between the first correlation measure and the second correlation measure.