PICTURE QUALITY ENHANCEMENT APPARATUS, DIGITAL PHOTOGRAPHING APPARATUS WITH THE SAME AND PICTURE QUALITY ENHANCEMENT METHOD THEREOF

The present invention relates to an apparatus for enhancing image quality, a digital photographing apparatus having the same, and a method for enhancing image quality. The apparatus for enhancing the image quality comprises: a zone collected reduction filter (ZRF) installed between a lens unit and a...

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Bibliographische Detailangaben
1. Verfasser: CHOI, HARK LIM
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:The present invention relates to an apparatus for enhancing image quality, a digital photographing apparatus having the same, and a method for enhancing image quality. The apparatus for enhancing the image quality comprises: a zone collected reduction filter (ZRF) installed between a lens unit and an image sensor to transmit light passing through the lens unit to be emitted to the image sensor, and having a liquid crystal display (LCD) which can control light transmittance in each area which is multiply divided; an image processing unit for processing an image obtained by the image sensor with data; and a ZRF control unit for calculating the brightness of the multiply divided area in the image from the data processed by the image processing unit, and controlling the light transmittance with respect to an area of the LCD so as to reduce the brightness difference between areas in the image. According to the present invention, when the excessive brightness difference caused by a light saturation point or light insufficience in one screen exists, the image which has excellent clarity and color reproducibility can be obtained by partially controlling the light transmittance by the ZRF installed between a camera lens and the image sensor. 본 발명은 렌즈유닛과 이미지센서 사이에 설치되어 상기 렌즈유닛을 통과한 광을 상기 이미지센서에 조사하도록 투과시키고, 다수로 구획되는 영역마다 광투과율이 조절되는 LCD(Liquid Crystal Display)를 가지는 ZRF(Zone collected Reduction Filter); 상기 이미지센서에 의해 획득되는 영상을 데이터로 처리하는 영상처리부; 및 상기 영상처리부에 의해 처리된 데이터로부터 상기 영상에서 다수로 구획된 영역의 밝기를 산출하고, 상기 영상에서 영역간의 밝기차를 줄이도록 상기 LCD의 영역에 대한 광투과율을 제어하는 ZRF제어부;를 포함하도록 한 화질 개선 장치, 이를 가지는 디지털 촬영 장치 및 화질 개선 방법에 관한 것이다. 본 발명에 따르면, 하나의 화면 내에서 영역별 광포화 또는 광부족으로 인해 과도한 밝기차가 존재할 경우, 카메라렌즈와 이미지센서 사이에 설치된 ZRF(Zone collected Reduction Filter)에 의해 부분별 광투과율을 조절함으로써 선명도와 색재현성이 우수한 영상을 획득하도록 한다.