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Matrox8 VB2005: Histogram

admin — Fri, 18 May 2012 15:35:10 +0000

December 1, 2010
The histogram is a basic tool in image analysis, the Matrox histogram extracted using ImageProcessing tool. The set ImageProcessing ResultType impHistogramList.
histogram represents the number of pixels in the image corresponding to each pixel value. If it is 8-bit grayscale is 0-255 total of 256 gray value of each gray value of the number of pixels in the image.
consider the extraction of upper right histogram, example code are as follows:
ImageProcessing.Histogram ()
Dim StartX (256) As Integer
Dim StartY (256) As Integer
Dim EndX (256) As Integer
Dim EndY (256) As Integer

With GraphicContext.DrawingRegion
Dim i As Integer
For i = 0 To ImageProcessing.Results.Count – 1
StartX (i) = i StartX 1

StartY (i), =. StartY
the
EndX (i) = i . StartX 1
esults ImageProcessing.Results.Item (i) the saved 0-255 for each value of the number of pixels.
he Calculate the heigth of the line from the histogram result
HIST_SCALE_FACTOR is a scale factor, show a straight line with (8)
EndY (i) =. StartY – (ImageProcessing.Results.Item (i) / HIST_SCALE_FACTOR)
Next i
End With
raw the entire histogram in the overlay
GraphicContext.LineSegments (StartX, StartY, EndX, EndY)
control GraphicContext draw a straight line with the results as shown in the bottom right (Display overlay results, so the background is black). Of array StartX, StartY, EndX EndY the starting and ending points of a straight line.

Matrox8 VB2005: Warp

admin — Fri, 18 May 2012 15:35:06 +0000

October 23, 2010
use the Warp tool can get distorted images, in turn, the image geometric calibration. (1) the introduction of a reference to the class: Imports the System.Math an Imports Matrox.ActiveMIL.SysSystemTypeConstants an Imports Matrox.ActiveMIL.ImageProcessing.ImpOverscanModeCo nstants an Imports Matrox.ActiveMIL.ImageProcessing.ImpInterpolationM odeConstants an Imports the System.Threading ulti-threaded Imports Matrox.ActiveMIL.ImBandConstants ( 2) Figure -1 loaded in the Form_Load set WarpLUT parameters:
With ImageProcessing.WarpParameters.WarpLUT
. NumberOfFractionalBits = 0
. DataDepth = 16
. SizeX = ImageWidth
. SizeY = ImageHeight
EndWith
ImageProcessing.Allocate () Figure 1: -2:4 angle of the original image
the Warp
(3) Next is the angle of the Warp 4, the results shown in Figure -2:
With ImageProcessing.WarpParameters,- efine the four corner Warp parameters
Quadrilateral.X1 = 0
Quadrilateral.Y1 = 0

. Quadrilateral.X2 = 456
. Quadrilateral.Y2 = 62
. Quadrilateral.X3 = 333
. Quadrilateral. Y3 = 333
. Quadrilateral.X4 = 100
. Quadrilateral.Y4 = 500
. Rectangle.X1 = 0
< br />. Rectangle.Y1 = 0
. Rectangle.X2 = ImageWidth – 1
. Rectangle.Y2 = ImageHeight – 1
angle to the transformation of rectangular
the
. MapQuadrilateralToRectangle, ()
arp Look Up Table (LUT)
GenerateLUT ()
EndWith
mage Warp transform
ImageProcessing.Warp (impNearestNeighbor, impOverscanEnable,) Figure -3: sine the Warp

-4: spherical the Warp (1) the
(4) sine Warp diagram (3):
tatement LUTs
Dim LutXArray (ImageWidth – 1, ImageHeight – 1) AsShort
Dim LutYArray (ImageWidth – 1, ImageHeight – 1) AsShort
ill the lut with a sinusoidal waveforms with a precision of 5 bits
Dim i AsInteger
Dim j AsInteger
For j = 0 To ImageHeight – 1
For i = 0 To ImageHeight – 1
LutYArray (i, j) = FIXED_POINT_PRECISION_BITS * (j (20 * Sin (0.03 * i)))
LutXArray (i , j) = FIXED_POINT_PRECISION_BITS * (i (20 * Sin (0.03 * j)))
Next i
Next j
et the warp parameters
With ImageProcessing.WarpParameters.WarpLUT
. NumberOfFractionalBits = FIXED_POINT_PRECISION
. Put (LutXArray, LutYArray)
EndWith
lear the display image
ImageBuffer.Clear (0)
Warp the image using the custom Luts
ImageProcessing.Warp (INTERPOLATION, impOverscanEnable) -4: spherical Warp (2)
Figure -4: the spherical Warp (3)
(5 ) spherical Warp: see Figure -4, by setting a good step, When is shown continuously feel the image into the animation. (6) define the two functions, one is to create a spherical LUTs, a multi-threaded display. Private Sub GenerateSphericLut (ByVal LutX of As the Array, ByVal LutY As Array) Dim i, j AsInteger Dim utmp, vtmp, tmp, AsDouble Dim v AsShort et the ball radius
the Dim the Radius AsDouble = 200.0
enerate the X and Y Buffers
For j = 0 To ImageHeight – 1
Check if we are in the sphere (in the Y axis ).
vtmp = ((j – (ImageHeight / 2)) / Radius)
If Abs (vtmp) <1.0 Then
We scan from top to bottom, so we reverse the value obtained above.and we obtain the angle.
vtmp = Acos (-vtmp)
If (vtmp = 0.0) Then
vtmp = 0.0000001
EndIf
e compute the position to fetch in the source.
v = ((vtmp / 3.1415926) * (ImageHeight – 1) 0.5)
ompute the y coordinate of the sphere.
tmp = Radius * Sin (vtmp)
For i = 0 To ImageWidth – 1
heck if we are in the sphere.
utmp = ((i – (ImageWidth / 2) ) / tmp)
If (Abs (utmp) <1.0) Then
utmp = Acos (-utmp)
ompute the position to fetch (we fold the image in four).
LutX (i, j) = FIXED_POINT_PRECISION_BITS * (((utmp / 3.1415926) * ((ImageWidth / 2) – 1) 0.5))
LutY (i, j) = FIXED_POINT_PRECISION_BITS * (v)
Else
efault position (we fetch outside the buffer to
< br /> ctivate the clear overscan).
LutX (i, j) = FIXED_POINT_PRECISION_BITS * (ImageWidth)
LutY (i, j) = FIXED_POINT_PRECISION_BITS * (ImageHeight)
EndIf IXED_POINT_PRECISION_BITS = 32
Next i
Else
For i = 0 To ImageWidth – 1
efault position (Fetch outside the buffer for clear overscan).
LutX (i, j) = FIXED_POINT_PRECISION_BITS * (ImageWidth)
LutY (i , j) = FIXED_POINT_PRECISION_BITS * (ImageHeight)
Next i
EndIf
Next j
EndSub (7) multi-threaded display: Private Sub RotateThreadSub () Dim OffsetX AsLong = 0 Dim i0 AsInteger = 0 Dim str0 AsString While Rotating = True llocate a child image in the image containing the two images ImageChild.ChildRegion.OffsetX = OffsetX ImageChild.Allocate () arp the child in the window ImageProcessing.Source1 = ImageChild ImageProcessing.Warp (INTERPOLATION, impOverscanEnable) Update the offset (shift the window to the right) OffsetX = ROTATION_STEP 2 Reset the offset if the child is outside the image If (OffsetX> ImageWidth – 1) Then OffsetX = 0 EndIf ImageChild.Free () EndWhile EndSub (8) the actual implementation of the spherical transform, load the original image first, next the Dim LutXArray (ImageHeight – 1, ImageHeight – and 1) AsShort the Dim LutYArray (ImageHeight – 1, ImageHeight – 1) AsShort GenerateSphericLut (LutXArray, LutYArray) o produce spherical LUTs
With ImageProcessing.WarpParameters.WarpLUT
NumberOfFractionalBits = FIXED_POINT_PRECISION
. Put (LutXArray, LutYArray)
EndWith
uplicate the image to allow wrap around in the warping
ImageBuffer.Copy (ImageSource, imAllBands)
ImageChild.ChildRegion.OffsetX = ImageBuffer.SizeX
ImageChild.Allocate ()
ImageChild.Copy (ImageBuffer, imAllBands )
ImageChild.Free ()
lear the destination
ImageBuffer.Clear (0)
ImageProcessing. Source1 = ImageChild
reate a new thread to do the processing
Rotating = True
RotateWorkThread = New Thread (AddressOf RotateThreadSub)

RotateWorkThread.SetApartmentState (ApartmentState. STA)
RotateWorkThread.Start () ulti-threaded
Of course, Rotating global variables, on behalf of the thread to stop sign , in Form_Closing in
If Rotating Then
lblComment.Update ()
ommand the RotateThread to stop

Rotating = False
ait for the thread to end
RotateWorkThread.Join ()
End if
thread-safe exit. Figure -4 just intercepted a few pictures, the actual display is like a ball in turn.

Hadoop InputFormat in ImageProcessing

admin — Fri, 18 May 2012 15:34:57 +0000

November 15th, 2010
image processing, used the hadoop model to do background calculation, but the image InputFormat class, you need to design their own from the Internet to find what on ImageProcessing in hadoop application of the article, summarize, and share with everyone:
If the small picture, the picture list in a text, and then use the WordCount example of each picture filename then call the image processing algorithm processing; (the reduce what is being done?)
If this is the big picture, then split for the image itself, you can use the WordCount the idea, the image data each line split, and then passed to the map, the map calls the image processing algorithms, will deal with the results passed to the reduce the reduce the output format you want. (Seeking Histogram of the image, then, can do)
if not by line to the split, the intuitive follow Rectagle to the split, to do so will be inconvenient, but some applications require such .
hope that we have any better suggestions to share!

Imageprocessing Library: an image filter library

admin — Fri, 18 May 2012 15:34:48 +0000

March 8, 2011

Imageprocessing Library is a library as3 the simple and efficient image filters. Which contains 50 kinds of image processing methods. (The official introduction, not verified)
deface the official example of this package, simply looked at the powerful, but not open source.
official blog address: http://blog.joa-ebert.com/imageprocessing-library/
the latest version of the swc address: http://je2050.de/ files/source/as3/ImageProcessing. the zip
Document Address: http://je2050.de/imageprocessing/
a few examples:
imitation of the PS curve tools: http://je2050.de/showroom.php?file=curves
binding pv3d do an example: to http://je2050.de/showroom.php?file = roto

Please help the query papers included not anxious! Good people to help check the following papers included by ISTP, EI, or SIC, thank you!

admin — Fri, 18 May 2012 15:34:39 +0000

1) Li Xiaofeng: Predicting GM (1, N) Model for the Coefficient of Variation of Hectometer Yarn Weight [J], Journal of Donghua University (English Edition), 2010,27 (3)
2 ) Li Xiaofeng Kong Lingshuang Wang Jianjun: Experiment Data Processing by Introducing Integration Gray Regression Model and Its Application [A], ICMTMA2011

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admin — Fri, 27 Apr 2012 09:08:59 +0000

lower case” or “in the query when ignored; so the above manipulation has actually become a “and” query.
Google search from the door to proficient v4.0 (a) how to describe this change? Previous study, the general need to pre-stored in the stomach enough knowledge from vast amounts of information, when necessary, to extract the desired part. This approach to learning has created a lot of “adequacy, educated Capella wit. However, to the field of information far beyond the “classics” new era of pre purpose swallow vast amounts of information to learn some differences should. For example, we went to a large city of books, often have a sense of bewilderment. The old learning methods need to change to adapt to this era of information explosion. Clarity of purpose to learning, that is, to know what to learn, and then with a purpose to find the answer in this way took a fancy to be more efficient. I might as well call this “learning style”, old known as “pre-school-style”. However, the implementation of the “Study” is conditional. First, ask the learner with an all-encompassing repository, for at any time to collect a variety of purposes; Second is the need of a powerful information retrieval tool to extract information from the repository so that efficient. Obviously, the Internet can act as a massive repository of information, search engines, then it is to do a good tool for looking for a light fire.
8.2, the query of a certain type of file (often with the same extension)

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admin — Fri, 27 Apr 2012 09:08:50 +0000

GOOGLE success thanks to its powerful features and unique characteristics:
“inurl” syntax returns links to pages containing a keyword, The back of the keywords in the link or web page document. There are many websites to a certain type of resources with the same attribute name in the directory name or the name of the page, such as MP3 “,” GALLARY “and so on, then you can found using INURL syntax of these links to related resources, and then, with the second The key words to determine whether a specific information. The INURL syntax and basic search syntax biggest difference is that the former is usually able to provide very accurate thematic information.

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admin — Fri, 27 Apr 2012 09:08:42 +0000

Example: search for information on Lu Xun the Sina cultural and educational channels.
(computer enthusiasts, learn basic computer, computer door, go to this site, I stand at the same time provide the basic knowledge of computer tutorials, basic computer knowledge questions for everyone to learn and use), known in the first half of 2000 GOOGLE the. Prior to this, I search for information in English is usually used to AltaVista, the search for Chinese information is used Sina. However, since the use GOOGLE, it has become my Favorite Searchengine. Thanks Sina User caoxi, original precisely because of his vigorously promoted, it makes me know got Google.
search: “Yi Jin Jing – suction Star

2011 addicted Underwear is the HQ images

admin — Fri, 27 Apr 2012 09:08:33 +0000

Plagued electric commercial enterprises is an important issue is duplicate content. You might sell a lot of very similar products (or products) from the same manufacturer, the product description more identical, and in addition there are many other electric and commercial enterprises with sales of homogeneous products. A unique description of the product is a shortcut to stand out from the site of many electricity providers.
optimized interface There are many ways to introduce three kinds, is considered to play a valuable role.
an e-commerce website, there may be thousands of pages, for example, Amazon had a few million pages, those who only sell a certain product e-commerce sites may pages are relatively small, but definitely not a small number. The so-called on-site optimization, page by page by page through each page, adjust and optimize the interface, making it more easily by search engines search, thereby increasing the number of visits, and increase sales. A lot of power website because the content is too difficult to individually adjust, does not implement interface optimization. Optimize the interface is indeed a very complex task, requires a lot of time and effort, but it is worth doing.
this electric provider website has been supported, but would like to do the business of the electricity supplier who can think a little deeper into the problem. Reviews is important for visitors, because of doubts about the problems in online shopping, how to eliminate this barrier, so that e-commerce can go bigger and better, is worth thinking about

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admin — Wed, 18 Apr 2012 17:04:36 +0000

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