激光与红外
激光與紅外
격광여홍외
LASER & INFRARED
2014年
12期
1344-1348
,共5页
单幅红外图像校正%中值直方图均衡%高斯权重%局部自适应%无鬼影
單幅紅外圖像校正%中值直方圖均衡%高斯權重%跼部自適應%無鬼影
단폭홍외도상교정%중치직방도균형%고사권중%국부자괄응%무귀영
single-image non-uniformity correction%midway histogram equalization%Gaussian weights%locally adap-tive%no “ghost-artefact”
为了实现对单幅红外图像的非均匀性校正并且对局部细节的校正效果进行优化，提出了一种局部自适应的非均匀校正算法。算法利用红外焦平面阵列的固定图像噪声呈单方向分布的特性，采用基于高斯权重思想的中值直方图非均匀算法实现红外图像的单参数校正；然后将图像分块，使图像的各局部都能够自适应地选择各自最合适的校正参数，达到优化细节的校正效果。实验结果及分析表明：与单参数中值直方图非均匀校正算法相比，提出的算法在均方根误差、峰值信噪比、图像平滑性等方面都得到了进一步的改善，并且保留了更多的图像细节，为非均匀校正提供了一种方法。
為瞭實現對單幅紅外圖像的非均勻性校正併且對跼部細節的校正效果進行優化，提齣瞭一種跼部自適應的非均勻校正算法。算法利用紅外焦平麵陣列的固定圖像譟聲呈單方嚮分佈的特性，採用基于高斯權重思想的中值直方圖非均勻算法實現紅外圖像的單參數校正；然後將圖像分塊，使圖像的各跼部都能夠自適應地選擇各自最閤適的校正參數，達到優化細節的校正效果。實驗結果及分析錶明：與單參數中值直方圖非均勻校正算法相比，提齣的算法在均方根誤差、峰值信譟比、圖像平滑性等方麵都得到瞭進一步的改善，併且保留瞭更多的圖像細節，為非均勻校正提供瞭一種方法。
위료실현대단폭홍외도상적비균균성교정병차대국부세절적교정효과진행우화，제출료일충국부자괄응적비균균교정산법。산법이용홍외초평면진렬적고정도상조성정단방향분포적특성，채용기우고사권중사상적중치직방도비균균산법실현홍외도상적단삼수교정；연후장도상분괴，사도상적각국부도능구자괄응지선택각자최합괄적교정삼수，체도우화세절적교정효과。실험결과급분석표명：여단삼수중치직방도비균균교정산법상비，제출적산법재균방근오차、봉치신조비、도상평활성등방면도득도료진일보적개선，병차보류료경다적도상세절，위비균균교정제공료일충방법。
In order to correct the non-uniformity (NU)of a single infrared (IR)image and optimize the result of de-tails,a locally adaptive non-uniformity correction algorithm is proposed.According to the distribution character of the fixed pattern noise in infrared focal plane array,median histogram equalization non-uniformity algorithm based on Gaussian weights is used to realize single parameter correction of infrared image.Then all images are decomposed into patches,and each patch of images can adaptively select the most suitable correction parameter,and can realize detail optimization.The experiment results show that the proposed algorithm in root-mean-square error(RMSE),peak signal to noise ratio (PSNR)and the smooth of image is improved further compared with single parameter median histogram equalization non-uniformity correction algorithm,and it reserves more details of images,which provides a new method for non-uniformity correction.
