公开(公告)号：KR101071567B1

公开(公告)日：2011-10-10

申请号：KR1020090016766

申请日：2009-02-27

Applicant: 숭실대학교산학협력단

Inventor： 한헌수 ,  한영준 ,  윤현섭

IPC: H04N5/202 ,  H04N9/04 ,  G06T5/00

Abstract: 본발명은히스토그램을밀도특성에따라분할하고히스토그램의영역별평활화를통하여영상의명암대비를향상방법에관한것이다. 히스토그램의밀집정도와히스토그램누적양을고려하여높은밀도를나타내는히스토그램영역을나눈다. 비슷한특성을나타내는영역들이찾아지면각 영역에포함된밝기정보를이용하여히스토그램평활화를수행한다. 마지막으로각 영역별평활화된결과영상을합침으로써과도한평활화의왜곡없이최대한명암대비를향상시켜입력영상의화질을개선시킨다.

公开(公告)号：KR1020100097892A

公开(公告)日：2010-09-06

申请号：KR1020090016766

申请日：2009-02-27

Applicant: 숭실대학교산학협력단

Inventor： 한헌수 ,  한영준 ,  윤현섭

IPC: H04N5/202 ,  H04N9/04 ,  G06T5/00

CPC classification number: G06T5/008 ,  G06T5/40 ,  H04N1/4074 ,  H04N1/4092

Abstract: PURPOSE: A method for improving light and shade contrast through histogram equalization partitioning which is divided based on density is provided to improve light and shade contrast without excessive distortion. CONSTITUTION: A histogram region showing high density is divided by considering histogram accumulated amount and congestion degree of a histogram. If regions showing similar characteristic is found, histogram equalization is performed by using brightness information included in each area. A result image equalized by each area is added. Therefore, the image in which light and shade contrast is improved without distortion is obtained.

Abstract translation: 目的：提供基于密度分割的直方图均衡分割来提高亮度和阴影对比度的方法，以提高光和阴影对比度，而不会出现过度的失真。 构成：通过考虑直方图的直方图累积量和拥挤度来划分显示高密度的直方图区域。 如果发现具有类似特征的区域，则通过使用包括在每个区域中的亮度信息来执行直方图均衡。 添加由每个区域均衡的结果图像。 因此，可以获得没有变形地改善亮度和阴影对比度的图像。