Image processing apparatus image processing method, and control program to perform face-detection processing

Abstract

An image processing apparatus including a detector to detect a face in an image is provided. The image processing apparatus sets a size of the face to be detected, changes a detection condition for face detection in accordance with the size of the face set, applies the detection condition changed to the detector, and detects the face from the image by use of the detector to which the detection condition is applied.

1 - 11 . (canceled) 
     
     
         12 . An image processing apparatus for detecting a face in an image using a plurality of discriminations, the image processing apparatus comprising:
 a setting unit configured to set a plurality of thresholds used for the plurality of discriminations, such that, as a size of a detection target in an image is smaller, a threshold is set to reduce incorrect detection of an area that is not a face; and   a detecting unit configured to calculate a plurality of evaluation values from an area corresponding to the face size of the detection target in the image using the plurality of discriminations, and to detect a face in the image using the plurality of thresholds set by the setting unit and the plurality of calculated evaluation values,   wherein the detecting unit stops detecting in the area based on a result of comparing an evaluation value calculated by at least one discrimination of the plurality of the discriminations with at least one threshold of the plurality of thresholds set by the setting unit.   
     
     
         13 . An image processing method for detecting a face in an image using a plurality of discriminations, the image processing method comprising the steps of:
 setting a plurality of thresholds used for the plurality of discriminations, such that, as a size of a detection target in an image is smaller, a threshold is set to reduce incorrect detection of an area that is not a face;   calculating a plurality of evaluation values from an area corresponding to the face size of the detection target in the image using the plurality of discriminations; and   detecting a face in the image using the plurality of thresholds set in the setting step and the plurality of calculated evaluation values,   wherein the detecting step stops detecting in the area based on a result of comparing an evaluation value calculated by at least one discrimination of the plurality of the discriminations with at least one threshold of the plurality of thresholds set in the setting step.   
     
     
         14 . A non-transitory computer-readable storage medium storing a program which causes a computer to perform an image processing method for detecting a face in an image using a plurality of discriminations, the image processing method comprising the steps of:
 setting a plurality of thresholds used for the plurality of discriminations, such that, as a size of a detection target in an image is smaller, a threshold is set to reduce incorrect detection of an area that is not a face;   calculating a plurality of evaluation values from an area corresponding to the face size of the detection target in the image using the plurality of discriminations; and   detecting a face in the image using the plurality of thresholds set in the setting step and the plurality of calculated evaluation values,   wherein the detecting step stops detecting in the area based on a result of comparing an evaluation value calculated by at least one discrimination of the plurality of the discriminations with at least one threshold of the plurality of thresholds set in the setting step.