查询词典 edge detection

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。

Edge is one of the most important features of image and image edge detection is the main aspects of image processing.

图像最基本的特征是边缘，图像的边缘检测是图像处理的主要内容之一。

Finally, it studies the application of the edge detection in human face detection and recognition.

最后通过实例研究了人脸边缘检测在人脸检测和识别中的具体应用。

Edge is the most basic feature of images, so edge detection is an important content of image processing.

边缘是图像最基本的特征，因而边缘检测是图像处理中的重要内容。

Finally, it introduced the application of the edge detection in human face detection and recognition.

最后介绍了人脸边缘检测在人脸检测和识别中的具体应用。

The grey scale of the pixels in image is expressed by quantum bit and the relation between two pixels is described by means of the superposition of two quantum bit in this paper.Based on this,the average of linear hermitian operator in this superposition can be used for judging the edge of image and a new method for edge detection of image is so created.The rationality of the method is interpreted by probability theory here.

利用量子比特表示图像像素的灰度，用双量子位叠加态来描述两像素之间的关联，通过线性厄米算符在该量子叠加态中的平均值来判断像素的边缘特征，由此建立了一种新的图像边缘检测方法，并从概率论的角度对该方法的合理性给予解释。

Describe a combined way of wavelet edge detection with the conventional hydrometer detection algorithm to detect cloud.

在传统云检测算法基础上，应用小波变换对原始云图进行边缘检测。

A optimum algorithm based on gradient sharpening about edge detection of image is proposed according to the shortcoming of the conventional algorithm unable to recognize the blurred edge,unclear character in the image of instrument on board.

针对机载仪表视频图像存在边缘模糊，字符不清，传统算法难于识别的缺点，提出了一种基于梯度锐化的图像边缘检测的优化算法。

Firstly,isoperimetric algorithm is applied in still image segmentation,and the result is compared with two methods based on edge detection and region detection.Then,isoperimetric algorithm is used to segment image video by combined with operation of morphology.

首先利用等周算法对静止图像进行分割，并与边缘检测和区域检测的两种分割方法进行结果比较；接着利用等周算法并结合数学形态学处理对图像序列的分割进行了研究。

One algorithm,isoperimetric algorithm based on graph theory is applied and researched on image segmentation.Firstly,isoperimetric algorithm is applied in still image segmentation,and the result is compared with two methods based on edge detection and region detection.

1引言图像分割是图像处理领域和计算机视觉中的一个基本而关键的问题，其目的就是将人们感兴趣的目标从图像背景中提取出来，为后续的分类、跟踪、识别、处理等提供基础。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。