边缘检测

Experimental results show our method can effectively reduce the interference of adjacent edge and can achieve good performance in extracting edge points of small structures.

实验结果表明，该算法能有效地降低邻近边缘干涉对检测结果的影响，可更好地提取尺寸较小的结构边缘。

Then the intracellular calcium concentration of neurons was measured by laser confocal scanning microscope , represented by the mean intracellular fluorescent intensity. On the ice, the cerebral cortical tissue at the infarction margin of the section after optic chiasm was rapidly dissociated about 100mg, then made into brain homogenate in low temperature. The high performance liquid chromatography was used to determine the Glu, Asp and Gly contents in homogenized brain tissue.

视交叉平面用2％TTC染色，用图像处理软件计算出脑梗死面积占该片脑组织面积的百分比；取视交叉前平面梗死边缘区皮层组织约100mg，用酶消化法制作神经细胞悬液，用激光扫描共聚焦显微镜检测皮层神经元细胞内游离钙离子浓渡，以细胞平均的荧光强度代表细胞内钙浓度；冰上迅速分离视交叉后梗死边缘区皮层组织约100mg，于低温下制作脑组织匀浆，用高效液相色谱法测定皮层匀浆中谷氨酸、天门冬氨酸、甘氨酸的含量。

In this paper, a new edge detection method——method using extremum of first directional derivative is proposed, based upon a general gradient edge model.

文中通过傅里叶变换，在频率域，通过求垂直于边缘的一阶方向导数，并检测其极值点来确定边缘。

For chromatic editing such as fade-in/fade-out and dissolve, the image edge will change from clear to vague and to clear again during the editing process So we use average edge density to detect fade-in/fade-out and dissolve Experiments indicate that this method can detect fade-in/fade-out and dissolve.

并针对两类编辑模型，提出了可以较好地描述各自独特规律的几个参量。根据淡入／淡出和慢转换过程中边缘由清晰到模糊再逐渐到清晰的特点，提出了用平均边缘强度AED进行淡入／淡出和慢转换的检测。

We will go into particulars some color spaces in common use and their characteristics,and summarize color image edge detection approaches arising in recent years.

在灰度图像中，图像的边缘是由灰度不连续造成的。检测灰度图像边缘最简便的方法就是利用各种微分算子[1]。相

At the same time, considering the jumpiness or incline caused inaccuracy and pretermission when the capsule moving ahead, two couples of infrared ray and electron transducer were designed to detect the light signal of the corresponding parts of the capsule. After the addition operation compensation and differential coefficient, turning the little different simulation signals of the body and cap of the capsule into digital signals for detection. It is more accurate for detection and stable to the disturbance. Step electromotor was used for the capsules direction turning which solved this problem efficiently. The capsules were ranged in order according to their colors with the cap at the same direction.

同时考虑到胶囊行进过程中跳动、倾斜及随机干扰造成的误判、漏判，设计了两对红外光电传感器用以同时检测胶囊上下两个边缘部位的光信号，两个检测信号经加法运算补偿、微分运算处理，将体现胶囊的帽、体微小几何尺寸差别特征的弱模拟信号直接转变成数字量检测，提高了检测的准确率及抗干扰能力，并由步进电机控制胶囊掉头，有效地解决了胶囊体、帽的位置调整，分色调头排列，达到帽、体一致。

It's main feature is that we can obtain many types of edges simultaneously by detecting the maximum value of local energy.After that,we get the initial edge.

对于边缘的检测，近年来，人们的研究兴趣更多的转向了局部能量的方法，这是一种基于局部相位的方法，它的特点是通过局部能量的最大值可以同时得到不同类型的边缘。

Utilizing a variety of computer-generated patterns, we tested visual responses of 60 extracellularly recorded nLM cells and found that all these responses can be explained by the responses of neurons to edges of the objects.

使用多种视觉刺激检测扁豆核神经元的反应，发现神经元对所有刺激图形的反应都可归结为对边缘的反应，扁豆核神经元实质上是运动边缘检测器。

The inspection accuracy and inspection speed of the proposed planar contour dominant point detection method are compared and analyzed by contrast experiments between the proposed method and some classical dominant point detection methods according to the edge information of image.

对本文提出的平面轮廓特征点检测方法与几种经典的基于图像边缘信息的特征点检测方法的检测精度与检测速度进行了对比实验与分析。

Method; A rat model of acute cerebral ischemia was built by photochemically initiated thrombosis . Vegf - mrna was observed with RT - PCR. Vegf and cell proliferation were observed with immunohischemistry.

用光化学法制作局部脑皮质梗死模型，针刺治疗3天后，应用RT—PCR检测梗死边缘区 VEGF mRNA的表达，用免疫组织化学方法检测VEGF表达和细胞增殖，用激光多谱勒检测造模后 2 h和72 h的血流情况量。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。