Patent ID: 7853079

Claim:
A method in a computerized device, the method comprising: identifying a frame in a plurality of frames contained in a video; generating a luminance value for each pixel in a plurality of pixels contained in the identified frame; and selecting the identified frame as a poster frame for the video if a luminance value for at least one pixel in the plurality of pixels contained in the identified frame is outside a predetermined range of luminance values, wherein the step of generating a luminance value for each pixel further comprises: dividing the identified frame into a plurality of blocks; and for each block in the plurality of blocks: (a) generating a luminance value for a reference pixel contained in the block, and (b) generating a luminance value for one or more additional pixels contained in the block; wherein the step of selecting the identified frame further comprises: determining the range of luminance values from the generated luminance value for the reference pixel; for each block in the plurality of blocks: (a) comparing the generated luminance values for the one or more additional pixels with the range of luminance values, and (b) concluding the block is good if one or more luminance values for the one or more additional pixels are outside the range of the luminance values; and selecting the identified frame as the poster frame for the video based on a number of blocks concluded to be good.