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- The discussion shows that with the step filter.The boundary enhancement in the region will appear when the noncontinuous gray grade (a hard boundary) and the epoch emerge in the multi-gray picture . 当多灰度级图像存在灰度不连续变化(硬边界)和有转折变化(尖点)时，使用阶跃滤波器都会在这样的区域内呈现边界增强。
- 2-Level nonlinear gray grade correction 2级非线性灰度校正
- Pupils who pass the test will be promoted to the next higher grade. 小学生只要考试及格就会升到高年级。
- His hair became gray when he was only forty. 他刚刚四十岁时，头发就变得灰白了。
- He's not in the first grade as a musician. 他不是第一流的音乐家。
- His face turned gray as he heard the bad news. 听到这个坏消息后，他的脸变得苍白。
- Business is now on the up grade. 目前生意蒸蒸日上。
- Pupils with 90% or more are awarded Grade A. 满90分的学生评为甲等。
- It is a medium- size samsonite, and it's gray. 它是一个中型的灰色绅耐特皮箱。
- The blue shirt and gray tie are a good match. 蓝衬衫和灰领带很相配。
- Stolen chips can find access to the gray market. 偷来的芯片可在水货市场上找到销路。
- He was still looking gray and very tired. 他看上去仍然面色苍白,疲惫不堪。
- His black hair was tinged with gray. 他的黑头发带着一点灰白。
- The sixth grade saw an educational film yesterday. 六年级学生昨天看了一部教育片。
- He received a failing grade on the term paper. 他的期末报告不及格。
- A yellowish gray to pale orange yellow. 土黄色，浅黄褐色一种黄灰色到淡桔黄色
- Red and yellow grade into orange. 红与黄混合成橘黄。
- The twins will enter the fourth grade this fall. 这对双胞胎今年秋季将升到四年级。
- Gray or white with or as if with age. 灰白的因年老而头发灰白的
- Their marriage is on the down grade. 他们的婚姻关系每况愈下。
