-
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.
標(biāo)簽：
OTSU
segmentation
Gray-level
segmented
上傳時(shí)間：
2017-04-24
上傳用戶：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.
標(biāo)簽：
processing
frequency
important
enhance
上傳時(shí)間：
2014-01-08
上傳用戶：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
標(biāo)簽：
considered
simulated
maturity
example
上傳時(shí)間：
2017-05-07
上傳用戶：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
標(biāo)簽：
Generate
Possion
between
random
上傳時(shí)間：
2017-05-25
上傳用戶：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)
}
標(biāo)簽：
gdk_pixbuf_animation_get_height
gdk_pixbuf_animation_get_width
ani
height
上傳時(shí)間：
2013-12-26
上傳用戶：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, ...
標(biāo)簽：
statistical
parameter
function
compute
上傳時(shí)間：
2017-06-27
上傳用戶：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.
標(biāo)簽：
Functions
are
functions
Discrete
上傳時(shí)間：
2017-08-05
上傳用戶：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.
標(biāo)簽：
FPGA-based
generator
embedded
hardware
上傳時(shí)間：
2014-01-09
上傳用戶：一諾88
-
說明：
column_list列出要添加數(shù)據(jù)的列名。在給表或視圖中部分列添加數(shù)據(jù)時(shí)，必須使用該選項(xiàng)說明這部分列名。
DEFAULT values說明向表中所有列插入其缺省值。對(duì)于具有INDENTITY屬性或timestamp數(shù)據(jù)類型的列，系統(tǒng)將自動(dòng)插入下一個(gè)適當(dāng)值。對(duì)于沒有設(shè)置缺省值的列，根據(jù)它們是否允許空值，將插入null或返回一錯(cuò)誤信息。
標(biāo)簽：
column_list
數(shù)據(jù)
分
上傳時(shí)間：
2017-08-29
上傳用戶：離殤
-
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.
標(biāo)簽：
Delphi 泛型
上傳時(shí)間：
2015-07-01
上傳用戶：mirage
