OTSU Gray-level image segmentation using Otsu s method. Iseg = OTSU(I,n) computes a segmented image (Iseg) containing n classes by means of Otsu s n-thresholding method (Otsu N, A Threshold Selection Method from Gray-Level Histograms, IEEE Trans. Syst. Man Cybern. 9:62-66 1979). Thresholds are computed to maximize a separability criterion of the resultant classes in gray levels. OTSU(I) is equivalent to OTSU(I,2). By default, n=2 and the corresponding Iseg is therefore a binary image. The pixel values for Iseg are [0 1] if n=2, [0 0.5 1] if n=3, [0 0.333 0.666 1] if n=4, ... [Iseg,sep] = OTSU(I,n) returns the value (sep) of the separability criterion within the range [0 1]. Zero is obtained only with images having less than n gray level, whereas one (optimal value) is obtained only with n-valued images.
标签： OTSU segmentation Gray-level segmented
上传时间： 2017-04-24
上传用户：yuzsu
The frequency domain plays an important role in image processing to smooth, enhance, and detect edges of images. Although image data typically does not include imaginary values, the fast Fourier transform (FFT) has been used for obtaining spectra. In this paper, the fast Hartley transform (FHT) is used to transform two-dimensional image data. Because the Hartley transform is real valued, it does not require complex operations. Both spectra and autocorrelations of two-dimensional ultrasound images of normal and abnormal livers were computed.
标签： processing frequency important enhance
上传时间： 2014-01-08
上传用户：1051290259
An example case is considered to price an option at a maturity of T years - prices are simulated for Geometric brownian motion process at 2*T maturity, and Brownian Bridge is used to obtain prices at T maturity. Finally option prices are compared to Black Scholes values to verify results
标签： considered simulated maturity example
上传时间： 2017-05-07
上传用户：hjshhyy
Generate Possion Dis. step1:Generate a random number between [0,1] step2:Let u=F(x)=1-[(1/e)x] step3:Slove x=1/F(u) step4:Repeat Step1~Step3 by using different u,you can get x1,x2,x3,...,xn step5:If the first packet was generated at time [0], than the second packet will be generated at time [0+x1],The third packet will be generated at time [0+x1+x2], and so on …. Random-number generation 1.static method random from class Math -Returns doubles in the range 0.0 <= x < 1.0 2.class Random from package java.util -Can produce pseudorandom boolean, byte, float, double, int, long and Gaussian values -Is seeded with the current time of day to generate different sequences of numbers each time the program executes
标签： Generate Possion between random
上传时间： 2017-05-25
上传用户：bibirnovis
width = gdk_pixbuf_animation_get_width(ani) height = gdk_pixbuf_animation_get_height(ani) current_frame_list = gdk_pixbuf_animation_get_frames(ani) pixmap = gdk_pixmap_new(w->window, width, height, -1) clean_pixmap = gdk_pixmap_new(w->window, width, height, -1) if (w->style->bg_pixmap[GTK_STATE_NORMAL]) { GdkPixmap *bg = w->style->bg_pixmap[GTK_STATE_NORMAL] GdkGC *gc GdkGCvalues values values.tile = bg values.fill = GDK_TILED gc = gdk_gc_new_with_values(w->window, &values, GDK_GC_FILL|GDK_GC_TILE) gdk_gc_set_ts_origin(gc, (w->allocation.width - width)/2, (w->allocation.height-height)/2) gdk_draw_rectangle(clean_pixmap,gc, TRUE, 0, 0, width, height) gdk_gc_destroy(gc) } else { gdk_draw_rectangle(clean_pixmap, w->style->bg_gc[GTK_STATE_NORMAL], TRUE, 0, 0, width, height) }
标签： gdk_pixbuf_animation_get_height gdk_pixbuf_animation_get_width ani height
上传时间： 2013-12-26
上传用户：thinode
This file is a function under matlab which allow to compute several statistical parameter of random signal such as variance, power, mean values, std, ...
标签： statistical parameter function compute
上传时间： 2017-06-27
上传用户：ruixue198909
Functions are mappings from one Manifold to another. Discrete Functions are functions which can be represented using a finite number of values. Given the finite extent of computer memory, algorithms which compute a function that satisfies some special properties are computing a discrete function which approximates a continuous function. Computing the function involves writing a set of equations that may be solved for the values representing the function.
标签： Functions are functions Discrete
上传时间： 2017-08-05
上传用户：671145514
a true random number generator (TRNG) in hardware which is targeted for FPGA-based crypto embedded systems. All crypto protocols require the generation and use of secret values that must be unknown to attackers.Random number generators (RNG) are required to generate public/private key pairs for asymmetric algorithm such as RSA and symmetric algorithm such as AES.
标签： FPGA-based generator embedded hardware
上传时间： 2014-01-09
上传用户：一诺88
说明： column_list列出要添加数据的列名。在给表或视图中部分列添加数据时，必须使用该选项说明这部分列名。 DEFAULT values说明向表中所有列插入其缺省值。对于具有INDENTITY属性或timestamp数据类型的列，系统将自动插入下一个适当值。对于没有设置缺省值的列，根据它们是否允许空值，将插入null或返回一错误信息。
标签： column_list 数据 分
上传时间： 2017-08-29
上传用户：离殇
Collection of key-value pairs. TDictionary represents a generic collection of key-value pairs. This class provides a mapping from a collection of keys to a collection of values. When you create a TDictionary object, you can specify various combinations of initial capacity, equality operation, and initial content. You can add a key that is associated with a corresponding value with the Add or AddOrSetValue methods. You can remove entries with Remove or Clear, which removes all key-value pairs. Adding or removing a key-value pair and looking up a key are efficient, close to O(1), because keys are hashed. A key must not be nil (though a value may be nil) and there must be an equality comparison operation for keys. You can test for the presence or keys and values with the TryGetValue, ContainsKey and ContainsValue methods. The Items property lists all Count dictionary entries. You can also set and get values by indexing the Items property. Setting the value this way overwrites any existing value. The class TObjectDictionary inherits from TDictionary and provides an automatic mechanism for freeing objects removed from dictionary entries.
标签： Delphi 泛型
上传时间： 2015-07-01
上传用户：mirage
