62results about How to "Avoid prediction" patented technology

The invention provides a face alignment method and device. The face alignment method and device are used for relieving the problems that during face alignment, the calculated amount is large, the requirement on hardware is high, and faces are hardly transplanted to mobile equipment. The method includes the steps that multiple face alignment models with different deflection angles are established;when the face alignment models with different deflection angles carry out prediction of T stages on a to-be-detected face image, the confidence coefficient of prediction shape, predicted on the current prediction stage by the face alignment models with different deflection angles, of the to-be-detected face image is determined, wherein T is a positive integer; the face alignment models with the confidence coefficients smaller than a preset threshold value are removed, and the remaining face alignment models continue to be used for carrying out next-stage prediction on the to-be-detected face image; according to the prediction shape, predicted in the Tth stage by the remaining face alignment models in the (T-1) stage, of the to-be-detected face image, the final prediction shape of the to-be-detected face image is determined.

A method and device for predicting a block of pixels of an image for encoding / decoding same. The method comprises a step of defining a causal vicinity of said block to be predicted, a step 2 of searching for candidate patches during which a set of candidate patches is formed from at least one patch belonging to an image other than the image to which the block to be predicted belongs, each patch being formed from a block and from a causal vicinity of said block, and a step 3 of block prediction during which the block is predicted at least from the block of at least one patch of said set of candidate patches.

A pixel block (300) is compressed by sub-sampling at least a portion of the pixels (310) into subblocks (320, 330). Predictions are determined for the property values of these subblocks (320, 330) by calculating a variance measure based on property values of neighboring pixels (310) / subblocks (320, 330) in two prediction directions in the block (300) relative to a current subblock (320, 330). Ifthe variance is below a threshold, the prediction is calculated based on neighboring property values in both directions. If the measure exceeds the threshold, the neighboring property values in only one of the two predictions directions are used for calculating the prediction. A guiding bit (450) descriptive of the selected direction is also provided. A prediction error is calculated based on theproperty value and the calculated prediction. The compressed block (400) comprises an encoded representation (460) of the prediction error and any guiding bit (470).