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Digital Image Processing plays a vital role in several applications. One of the applications is detection of people faces in a digital photo. Several research works have been progressing in the field of face identification and matching, facial expressions identification, smile detection, etc. Any application related to face, first step is detection of face. Thus, the face detection plays a key role. The face detection is a complicated process due to background objects, orientation, scale, lighting, geometrics, quality of image, occlusion, disguise etc. This paper discusses different research techniques published in the peer reviewed journal and proposed a technique to detect faces in a group photo.
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