mask n. 1.假面具,伪装,掩蔽物;面罩;防毒面具(= gas mask);【物理学】掩模;(劈剑,棒球等用)护面;(用蜡等从死人面部模制成的)蜡模遗容(= deathmask)。 2.口实;掩饰。 3.假面跳舞会;戴假面者;假面战。 4.(纪念打猎的)狐头,狐面。 5.(筑城)遮障,掩蔽角面堡;【印刷】蒙片;【摄影】蔽光框。 6.【计算机】时标,时间标志。 a flu mask 防感冒戴的口罩;卫生口罩。 assume [put on, wear] the mask 戴假面具,掩盖真面目。 drop [pull off, throw off] the mask 摘下假面具;现出本来面目。 under the mask of 假托,在…假面具下。 vt. 1.在(脸)上戴假面具;化装。 2.蒙蔽,遮蔽,隐,覆;【军事】掩蔽,隐蔽(兵力、炮位);掩护;(因逼近敌方)妨碍(友军)炮火射程;【印刷】(制版时)用蒙片修正(底片色调);【摄影】用蔽光框修改(照相的大小、形状等)。 vi. 戴假面具;化装;参加化装舞会。 We could not fire, as we were masked by our first line. 第一线挡住,我们无法射击。
The main works are as follows : firstly , we compare image enhancement in wavelet domain with that based on unsharp masking and indicate that there is intrinsic relation between them , namely they both enhance images by enhancing the high frequency coefficients . because after an image is decomposed in wavelet domain , every high frequency can be enhanced . however , if unshrap masking is used , only one high frequency channel is enhanced 本文主要研究了基于小波多分辨分析的图像去噪和增强,主要工作如下: 1将反锐化掩模与基于小波多分辨分析的图像增强进行了对比分析,指出它们之间存在着内在的联系,即两者都是对与图像边缘细节对应的高频实行增强,而且指出前者只不过是后者的一个特例,因为小波分解后,多级尺度多个高频通道可得到增,而反锐化掩模仅增强了一个高频通道。