pre-image

This paper researches the pre-image processing technique used in the substation monitoring system .

本课题进行了变电站无人值守监控系统的前期图像处理技术的研究。

New Custom Transformed Pictures are never created with more samples than there are pixels in their pre-image picture .

新的自定义转化图片永远不会创建更多的样本中有较前的形象图片像素。

The algorithms can be divided into five parts : pre-image , object detection , object tracking , object recognizing and fault detection .

整个算法设计可分为五个部分：图像预处理、目标的检测、运动目标的跟踪、目标的分类识别和铁路道口故障判断。

It not only used pre-image computation to avoid false negative , but also incorporated reachable states and unreachable states in the verification process .

除了利用原像计算避免误判之外，该算法还将可达状态和不可达状态引入到验证过程中。

We find that cryptographic hash functions could be replaced by discrete logarithm functions in some scenarios , such as mixing-transformation and message integrity verification . Secure discrete logarithm functions also have collision resistance and pre-image resistance , which are some security attributes that cryptographic hash functions should have .

分析发现，在实际应用中，离散对数函数可以代替密码杂凑函数，实现混合变换和消息完整性验证功能，并具有抗原像攻击、抗碰撞攻击等安全性。