Traditional wavelet transformation is calculated by convolution operation that needs a great lot of calculation and room. 传统的小波变换是利用卷积计算的,它需要大量的计算及存储空间。
The research shows that the rapid model is much faster than a pure Monte Carlo method with the help of convolution operation, when it is used to simulate multi photon excitation ( MPE) fluorescence scanning microscopic imaging through turbid medium. 将该模型用于混浊介质的多光子激发(MPE)显微成像研究,极大地提高了模拟效率。与直接蒙特卡罗方法计算结果的比较证实了该方法的正确性和有效性。
By using the method proposed, detailed descriptions of data parallel algorithm on histogram operation, region-growing image segmentation and image convolution operation are given. 采用该数学描述方法对数据并行图像处理中的灰度直方图运算、区域增长法图像分割以及图像卷积运算等3类图像处理方法进行了描述。
A series of primary pictures are made by optical Fourier transformation and convolution operation. 这种方法是通过对光学傅氏变换所获得的一系列初始图像进行卷积。
Because the number of data in image processing is very huge, and the existence of convolution operation and matrix multiplication, it is possible that parallel algorithm design and implement can be used in image processing. 由于图像处理过程中的数据量巨大,而且各种算法中大量卷积运算和矩阵乘法运算的存在,就为图像处理过程中的并行算法设计和实现提供了可能。
The scanning hologram of an object is the convolution of the transmittance of the object with the intensity distribution of the Fresnel zone plate and the reconstruction of the hologram is obtained by correlation operation. 该技术通过将物体的光强分布函数与菲涅耳波带板的光强分布函数进行卷积运算来得到物体的扫描全息图,通过相关解卷积的方法来进行扫描全息图的数字重建。
A new algorithm of deconvolution via window convolution operation is proposed, and the algorithm can solve the ill-posed problem occurring in deconvolution via circular convolution. 本文提出了一种用窗口卷积实现反卷积的新算法,这种算法解决了用圆周卷积计算反卷积时出现的病态问题。
By computer simulation with convolution sum of FIR digital filter, the results show that the model is the same as traditional binary coding arithmetic, which can be used in chaotic signal processing systems. operation of the genetic algorithm; 最后通过FIR数字滤波器卷积操作的计算机数值仿真,结果表明采用这些方法运算得到的结果与传统二进制算术编码算法完全等效,可应用于混沌信号处理系统。
The convolution difference technique has been applied to ESR spectra resolution enhancement and to deduction of the intrinsic width contribution from the overall linewidth in ESR imaging process. The convolution difference operation is examined and the change of ESR spectra before and after convolution difference is compared. 该文将卷积差技术应用于提高ESR谱的分辨率和在ESR成像过程中扣除固有线宽介绍了卷积差过程,对比了卷积差前后ESR谱的变化。
FIR digital filter is essentially a kind of linear convolution operation. When the step N of digital filter is very large, the calculation is also troublesome and the system cannot achieve the real-time request. FIR数字滤波器本质上是一种线性卷积的运算,当数字滤波器的阶次N很大时,计算量很大,计算速度很慢,达不到系统对实时性的要求。
In this new algorithm a fast DWT based on shift operation is developed which changes the convolution into matrix operation, and decomposes the matrix into some sub matrixes to increase the speed. 该方法将小波变换的卷积运算转换为矩阵相乘加,并根据DSP的指令和结构特点将矩阵分解,以移位运算来代替乘加运算从而大大提高了运算效率。
An approach is made to simplify the search procedures for optimum-excitation-selection in CELP coder by DFT ( Discrete Fourier Transform); i. e. by making use of the transform domain method to simplify convolution operation. 本文研究了一种用DFT(离散傅里叶变换)简化CELP编码中最佳激励选择的搜索过程,即利用变换域法简化卷积运算。
By converting initial-state into excitation in time domain, the complete response and zero-input response may also be calculated using convolution operation. 本文通过在时域下将系统初始状态转换为激励信号,从而使得利用卷积运算不仅能够计算零状态响应而且可以求解完全响应和零输入响应。
On the basis of analyzing variable step size adaptive filtering algorithm, adopted RAM search table to implement fast convolution in the filter operation. 在分析了变步长自适应滤波算法的基础上,采用基于RAM的查找表来实现滤波运算中的快速卷积。
The joint power spectrum recorded by CCD is processed with the Laplacian and convolution operation, and the correlation results are directly obtained with the inverse Fourier transformation of the processed data in a computer. 对CCD记录的联合变换功率谱进行拉普拉斯算符运算和卷积运算的处理,并通过处理后的功率谱直接在计算机中进行傅里叶逆变换获得相关输出。
Wavelet transform is used widely in signal processing. But the classical wavelet transform depends on Fourier transform, and its realization is based on a large amount of convolution computation, so the operation speed is low. 小波变换在信号处理中有着广泛的应用,但是传统的小波变换依赖于傅立叶变换,有大量的卷积运算,运算速度较慢。
Second, the real part and the imagine part of Hermitian wavelet have less oscillation than Morlet wavelet, so that the convolution operation can be process with fewer number of data points and the signal singularity will not be smeared. 其二是与Morlet小波相比较,Hermitian小波的实部和虚部振荡次数少,可用较少的数据点对信号进行卷积,从而不会损坏信号的奇异性。
Specialty of convolution operation and differential operation of anti-symmetrical biorthogonal wavelet transformation are deduced and analyzed. 推导了反对称双正交小波所具有的卷积运算性质,分析了反对称双正交小波所具有的微分算子功能。
The authors study the convolution operation process of discrete signal of sequence form by analyzing the discrete convolution and the operation methods of signals and linear systems. 通过对信号与线性系统中离散卷积及其运算方法的分析,研究序列形式的离散信号的卷积运算过程,在图解法基础上提出了较为简便的运算方法&列表法。
Study on the Discrete Signal Convolution Operation 离散信号卷积运算研究
Using image convolution operation to gain line features is researched, the coefficient can strengthen the way line features, also can weaken background gray constant area. 研究了用图像卷积运算获得线特征加强系数,该系数能加强道路线特征,同时也能弱化背景灰度恒定区域。
Convolution is a linear operator and an infinitesimal element of the cumulative form of multiplication. The common mask computing in image processing belongs to convolution operation. This technology is widely used in image filtering. 卷积是一种线性运算,是一种微元相乘的累加形式,图像处理中常见的mask运算都属于卷积运算,广泛应用于图像滤波。
There is no convolution operation in the proposed method, so the boundary effect can be avoided. 由于该方法中不含有卷积运算,因此避免了边界效应。
2-D filters for the convolution operation slow computing, using two-dimensional fast Fourier operation on completion of the iris feature extraction and encoding, improved speed of operation. 针对2-D滤波器的卷积运算运算慢的问题,采用二维的快速傅里叶运算对完成虹膜特征提取与编码,提高了运算速度。
Integer lifting scheme is independent of convolution operation and reduces the memory requirement and algorithm complexity, which is in-place calculation and wavelet coefficients are integer. 整型提升小波变换是一种不依靠卷积运算的实现方法,采用同址运算,并且小波系数是整型的,降低了对内存的需要,减少了算法的复杂度。
In contrast, when converted to the frequency domain, the convolution operation is converted to multiplication, which can greatly reduce the amount of calculation and the convergence will be fast, thus the frequency-domain algorithms have advantages over the time-domain ones. 相比之下,频域算法将卷积运算转化为乘积形式,能大大减少计算量,在算法效率上更具有优势。
This new approach can avoid frequently computing gradient histogram by using convolution operation to compute the gradient information of the neighborhood of feature points. 该算法用卷积运算来统计特征点子邻域的梯度信息,从而避免了频繁的计算子邻域的梯度直方图,且避免了大量的重复计算,提高了算法的快速性。
And we further explain that wavelet transform is essentially a convolution operation. Based on the convolution operation, we expound the structure of SAW device and its working principle. 分析二进小波变换实质上是一个卷积运算,从卷积运算出发,阐述小波变化器件及其工作原理。