mask n. 1.假面具,偽裝,掩蔽物;面罩;防毒面具(= gas mask);【物理學(xué)】掩模;(劈劍,棒球等用)護(hù)面;(用蠟等從死人面部模制成的)蠟?zāi)_z容(= deathmask)。 2.口實(shí);掩飾。 3.假面跳舞會(huì);戴假面者;假面戰(zhàn)。 4.(紀(jì)念打獵的)狐頭,狐面。 5.(筑城)遮障,掩蔽角面堡;【印刷】蒙片;【攝影】蔽光框。 6.【計(jì)算機(jī)】時(shí)標(biāo),時(shí)間標(biāo)志。 a flu mask 防感冒戴的口罩;衛(wèi)生口罩。 assume [put on, wear] the mask 戴假面具,掩蓋真面目。 drop [pull off, throw off] the mask 摘下假面具;現(xiàn)出本來面目。 under the mask of 假托,在…假面具下。 vt. 1.在(臉)上戴假面具;化裝。 2.蒙蔽,遮蔽,隱,覆;【軍事】掩蔽,隱蔽(兵力、炮位);掩護(hù);(因逼近敵方)妨礙(友軍)炮火射程;【印刷】(制版時(shí))用蒙片修正(底片色調(diào));【攝影】用蔽光框修改(照相的大小、形狀等)。 vi. 戴假面具;化裝;參加化裝舞會(huì)。 We could not fire, as we were masked by our first line. 第一線擋住,我們無法射擊。
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圖像去噪和增強(qiáng),主要工作如下: 1將反銳化掩模與基于小波多分辨分析的圖像增強(qiáng)進(jìn)行了對(duì)比分析,指出它們之間存在著內(nèi)在的聯(lián)系,即兩者都是對(duì)與圖像邊緣細(xì)節(jié)對(duì)應(yīng)的高頻實(shí)行增強(qiáng),而且指出前者只不過是后者的一個(gè)特例,因?yàn)樾〔ǚ纸夂?,多?jí)尺度多個(gè)高頻通道可得到增,而反銳化掩模僅增強(qiáng)了一個(gè)高頻通道。