Brevet : EP3429185 - PROCÉDÉ, DISPOSITIF ET APPAREIL PERMETTANT DE DÉTERMINER UNE FENÊTRE DE MISE AU...

Titre

PROCÉDÉ, DISPOSITIF ET APPAREIL PERMETTANT DE DÉTERMINER UNE FENÊTRE DE MISE AU POINT

N° et date de publication de la demande

EP3429185 - 16/01/2019

Type de la demande

A1

N° et date de dépôt

EP16895857.7 - 29/03/2016

N° et date de priorité

PCT/CN2016077734 - 29/03/2016

Famille de brevets

EP3429185A1 ; CN107439005A ; US2019208131A1 ; WO2017166076A1

Abrégé

A focus window determining method, apparatus, and device are provided, to resolve a problem that a hill climbing method is prone to cause out-of-focus. The method includes: when a face is detected in a to-be-photographed image, determining to use a face area as a current focus window; detecting a preset location in the face area, and adjusting a width of the current focus window according to the preset location in the face area; stretching a length of the current focus window according to at least a first preset ratio and a second preset ratio; calculating at least a contrast value of an image in the first focus window and a contrast value of an image in the second focus window; and determining a final focus window according to the at least two contrast values. Therefore, the width of the focus window is reduced, so that the focus window includes no background content. The focus window is stretched to a human body part, so that texture richness of the focus window can be improved, and further a focus effect in a face focus process is effectively improved.