gradient threshold
英 [ˈɡreɪdiənt ˈθreʃhəʊld]
美 [ˈɡreɪdiənt ˈθreʃhoʊld]
【计】分层阈值
双语例句
- Combining the two essential characteristics of the image, the gradient and the gray level, a threshold segmentation approach using maximum entropy with the gradient boundary control was proposed.
结合梯度和灰度这两种图像的本质特征，提出一种基于边界梯度控制的最大熵阈值分割方法。 - The relationship between permeability and the threshold pressure gradient is studied by the threshold pressure gradient experiment.
利用启动压力梯度实验，研究油层渗透率与启动压力梯度的关系； - The oxidation behavior of C/ C and C/ C-SiC gradient matrix composites were compared. The research results show that oxidation threshold of C-SiC co_deposited matrix increases through surface active sites occupied by SiC particles.
研究比较了C／C－SiC梯度基复合材料和C／C复合材料的氧化行为.实验结果表明：SiC通过占据表面活性点提高了共沉积基体的氧化起始温度； - Test with images collected from real world data shows that local border search algorithm is about 20 to 200 times faster than the traditional gray level gradient threshold algorithm, and can detect borders more accurately.
对现场图像数据测试表明，边界局部搜索算法比传统的灰度梯度阈值算法的速度快20~200倍左右，并且检测的效果得到有效的提高。 - By employing FDTD method and simulating the effects of electromagnetic on the heart of human body, the eddy-currents of the heart of human body induced by MRI time-varying gradient fields are computed and compared with the recommended threshold.
运用时域有限差分法（FDTD），通过电磁场对人体心脏影响的模型仿真，计算出心脏体段由磁共振成像（MRI）时变梯度场感应的涡流，并与已有的心脏刺激阈值进行比较。 - On the basis of integrating gray-level distribution and gradient information, we use boundary points as known data to interpolate the adaptive threshold surface of the image.
综合考虑图像的灰度分布和梯度信息，以图像的边缘点作为插值点，构造一个自适应的阈值曲面。 - Finally after a mean filter and Top-Hat filter, the largest absolute contrast gradient adaptive threshold is used to perform segmentation, and experiments show that this method is effective.
最后采用先均值后形态学Top-Hat滤波，最大绝对对比度自适应门限的方法进行分割，实验表明该方法是有效的。 - In this scheme, the inputs of hidden layer neurons are acquired by using the gradient descent method, and the weights and threshold of each neuron are trained using the linear least square method.
在该方案中，通过梯度法获取隐层神经元的输入，使用线性最小二乘法训练各神经元的权值和阈值。 - In same condition except the Threshold pressure gradient, when the threshold pressure gradient Becomes bigger, water cut becomes bigger, and the threshold Pressure gradient affects water drive characteristic curves of low Permeability reservoirs.
在其它相同情况下，当启动压力梯度越大时，含水率就越大。启动压力梯度影响低渗透水驱油藏水驱曲线。 - In the improved algorithm, the pre-processed image is smoothed and the proper gradient threshold is set to prevent the generation of insignificant regions.
该改进算法在预处理阶段对图像进行平滑操作并设置适当的梯度阈值，即减少了梯度图像中非重要区域的产生。 - To investigate the potential gradient threshold in different directions to excite cardiac tissue, perfused rabbit papillary muscle was used and transmembrane potential was recorded when rectangular pulses were applied to the tissue.
实验采用家兔离体右室乳头肌标本，检测电场刺激对各向异性心肌组织的兴奋阈值.用玻璃微电极技术记录由不同强度的电场梯度刺激所引起的细胞跨膜动作电位。 - The other is that the proposed 'modified gradient threshold' topology optimization algorithm is effective.
作者提出的“改进的敏度阈值”拓扑优化算法是有效的； - The same rock core has a lower threshold pressure gradient when larger steady threshold seepage velocities occur.
同一块岩心在初始稳定渗流速度大的情况下，岩心的启动压力梯度小。 - After getting the images of calibration points by CCD cameras, we can calculate the gradient of pixels, distill the pixels of transition area through a settled threshold, and use the position and gray information of these pixels to calculate the center of the calibration points.
用CCD摄像头摄取标定点图像后，计算各像素的梯度值，设定一定的阈值，提取出过渡区域的像素，利用这些像素的位置信息和灰度信息求解标定点圆心的位置。 - Aiming at characteristic differences of background and target, four-direction gradient is extracted out and areas with large gradient are smoothed by a linear threshold filter.
针对复杂背景及目标的分形特性差异，提取图像四个方向的灰度梯度，选择最小梯度大于阈值的区域进行平滑滤波，最后对分维参数进行分段线性拉伸。 - The induced eddy current is computed by simulating the effect of gradient electromagnetic field in MRI at the heart of human body with the method of FDTD. Comparing with the threshold, peak value of the induced eddy current is lower.
通过MRI中梯度磁场对人体心脏影响的模型仿真，运用FDTD方法计算出心脏部分感应涡流，并与心脏刺激阈值进行比较。 - After removing noise by the difference filtering arithmetic, the bubbles were separated from background to obtain the pre-segmentation image by using morphological gradient and adaptive threshold.
利用差影算法滤除背景干扰，依据形态梯度和自适应阈值分离前背景，得到预分割图像。 - With the concept of multi-scale morphology gradient, another mask image was made. The threshold can be selected naturally according to the image in this method and difficulties in selecting the threshold are avoided.
同时给出了基于多尺度形态学梯度的道路边界提取方法；对目标与背景灰度值相差较大、不大、较小的溶渣泡沫图像均能容易而准确地进行边界提取。 - Aiming at the problem of inaccuracy and noise sensitivity in HS and LK, the improved LK-HS optical flow based on gradient threshold is proposed.
针对它们存在的光流运动目标检测不准确、对噪声敏感等问题，本文提出了基于梯度阈值的LK-HS改进光流计算方法。 - High-precision measurements of the magnetic data were changed to correct date, correct height, horizontal gradient correction, base correction and normal market correction, threshold in determining the terrain correction, component extraction, tangent method and the forward fitting.
对高精度磁测数据进行了日变改正、高度改正、水平梯度改正、基点改正和正常场改正，异常下限确定，地形改正，分量提取，切线法及正演拟合。 - Detecting boundary surface using gradient threshold is a basic method, and traditionally, a global threshold is used.
应用梯度阈值来检测边界曲面是一种基本的方法，传统上采用全局梯度阈值。 - Initial DEM in first filtering is produced with smaller slope threshold, and then calculate the maximum slope. The maximum gradient value is used as the slope threshold of the second filter to solve the adaptive problem.
首次滤波时以较小的坡度阈值得到初始DEM，计算其最大坡度值，以最大坡度值作为第二次滤波的坡度阈值，一定程度上解决了坡度阈值选择的自适应问题。 - And then with a threshold of the gradient operator is applied to image sharpening processing, the iterative algorithm for the best threshold is adopted to achieve the binary division.
而后采用带阈值的梯度算子实现图像锐化，运用迭代式求图像最佳阈值算法实现图像的二值化分割。 - The results showed that the seepage flow of low mobility reservoir has threshold pressure gradient and nonlinear seepage flow feature. The lower mobility is, the higher threshold pressure gradient is. The threshold pressure gradient has high relativity power correlation with mobility.
实验表明，流度越低，启动压力梯度越高，且它们之间满足相关性非常高的乘幂变化关系。 - In the use of wavelet modulus local maxima, for the selection of local modulus maxima, we calculate it along the direction of gradient of the modulus maxima; for threshold selection, we use method of blocking adaptive threshold.
在使用小波模局部极大值过程中，针对局部模极大值的选取，采用沿梯度方向计算模极大值；针对阈值的选取，采用分块自适应阈值的选取方法。 - Extraction of vascular network using threshold segmentation method, based on the gray-the maximum entropy gradient threshold segmentation method to be the background image of the blood vessels.
为了提高血管与背景的差异度图像进行图像加强.采取有效阈值分割方法，提取视乳头采用大津法进行阈值分割，提取血管网络时采用基于最大熵的阈值分割法，得到血管网络信息。 - Analyzing to the nonlinear seepage flow feather, minimum threshold pressure gradient and pseudo-threshold pressure gradient were got. Function of relation between threshold pressure gradient and displacement pressure gradient was also proposed.
对相渗特征曲线进行了渗流特征理论分析，得到了最小启动压力梯度与拟启动压力梯度的理论值及启动压力梯度与驱替压力梯度的关系函数。 - The design can inspect various different capsule surface defects in different color image space of each component, using dynamic threshold segmentation, gradient threshold segmentation, and digital methods of morphology, so as to achieve the detection requirements for production process.
对于不同的特征图像，分别在各个分量通道中采用动态阈值分割、梯度阈值分割以及数字形态学等方法，有效地实现胶囊彩色图像各种缺陷特征的提取和识别，从而达到生产工艺的检测要求。 - Dynamic sliding window have a good local adaptation. Mutation or gradient shots often occurs between a few frames. This effectively avoids the drawbacks of global threshold.
动态滑动窗口有很好的局部适应性，镜头突变或渐变常发生在几帧之间，这样有效的避免了全局阈值带来的缺点。