乳腺摄影是目前检测乳腺癌最有效、可靠的方法。为很好的显示低对比度的乳腺异常,联合应用高对比度的屏-片系统是必要的。但胶片对比度的增加是以牺牲胶片有用曝光范围为代价的。在乳腺摄影中,与乳腺周边部相对应的胶片区是过度曝光的,从而导致此区域光学密度高而对比度低。考虑到数字胶片系统的非线性特性曲线,于是设计了计算机化的数字模式驱动密度补偿技术来克服此困难。这 Breast photography is the most effective and reliable method for detecting breast cancer. In order to show low contrast breast abnormalities well, a combination of high contrast screen-sheet system is necessary. However, the increase in film contrast is at the expense of the film’s useful exposure range. In mammography, the area of ​​the film that corresponds to the perimeter of the breast is overexposed, resulting in high optical density and low contrast in this area. Taking into account the non-linear characteristic of the digital film system, a computerized digital mode drive density compensation technique was then designed to overcome this difficulty. This