I've been trying to mess around with image recognition in C# for some time now. But to do that, I need acces to all the pixels in the bitmap individually. At the moment, I'm using getPixel and setPixel. It works, but it's VERY slow. Is there any faster way to acces pixels in a bitmap? Unsafe code maybe?
View 6 RepliesProtected Sub UploadButton_Click(sender As Object, e As EventArgs) _ Handles UploadButton.Click If UploadTest.HasFile = False Then ' No file uploaded! UploadDetails.Text = "Please first select a file to upload.. Else
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Was just wondering if there is a way to quickly clear all pixels in a bitmap without creating a new one?
View 1 RepliesMy goal is to iterate through each pixel determining whether it is black or white. Ideally I want to do this one row at a time (so I can count the number of black pixels in each row). This is a bitonal image.I tried to get it started, but I don't understand what value(s) I'm supposed to be polling for. The following code takes a stab at it (i.e. makes a guess as to what value I'm supposed to check) and then outputs that value to a textfile.When I read the textfile, though, it doesn't look like anything useful.This code is an attempted modification of some code found in a CodeProject article.[code]
View 5 Repliesi mostly use C and assembly, but i thought i would give VB.NET a shot. i used to use VB6 all the time, so wanted to see how different this is. in VB2010, i'm trying to modify the pixels of a Bitmap object and then make it show up in a PictureBox on the form. i get no errors, but this code does not show the new bitmap after it runs.."disp" is the name of the PictureBox on the form.[code]
View 1 RepliesPretty self-explanatory question. I'm trying to see if I can do sprite animation in Visual Basic and, while I can use a Graphics object to translate a bitmap down a few pixels, I have absolutely no idea how to erase the bitmap drawn in its former position. Is there any way to erase the old image before the new image is drawn onto the form?
View 14 RepliesI have scanned a few img's on 600 DPI. When i load them into a Bitmap class They have Vertical and Horizontal Resolution of 96 PPI To my calculation that is very close to 38 Pixels per centimeter. Now the image that I scanned is 4.5 Centimeter (1.77165354 Inch) In Diameter but When I measure It the 4.5 cm img is close to 1080 pixel in Diameter which is 240 Pixels/Centimeter (609.6 Pixels/inch) What is the correct way to get the actual Pixels per inch/centimeter from a bitmap or was it set incorrectly by my scanner ?
View 7 RepliesI am producing a marine radar display in VB.Net and struggling to get the radar data to display quickly enough.The data is coming into my application from a callback from the radar maker's dll. Each dataset consists of an integer between 0 and 8191 denoting the angle from the datum (ship's head) that the dataset represents and a byte array with 480 elements containing data from ship's position (byte 0) to maximum range (byte 480). Each of these locations is a single byte, I want to set both red and green components of the relevant pixel in a 1000 x 1000 bitmap to this byte value. The dataset number increments round from 0 to 8191 as the radar scanner rotates.
My first approach was to use math.sin and math.cos to convert polar coordinates to cartesian coordinates, and then use setPixel to set the colour of the relevant pixels but this is far too slow.I'm now trying to use Boop Boops 'FastPix'
[URL]
Which looks like it should be much better, but I am wondering if there is a more efficient approach, for example cutting out the polar to cartesian conversion, or putting the data direct into a byte array?I am also running the radar picture processing code on a thread separate to the UI thread to keep the UI responsive - what is the best way to display the resultant bitmap onto the UI? I am currently using a delegate and putting the bitmap into a picturebox?
I need to write a code to find identical adjacent pixels in a bitmap image. It should work as the 'magical wand' in Photoshop. My images are always black and white (white background with car parts drawed in black). Given the x,y coordinate for a single black pixel in the whole image, the code should find (and paint with another color, say red) all other black pixels that are linked to that one, and so on, until all linked black points will be painted in red.
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I need to write a code to find identical adjacent pixels in a bitmap image. It should work as the 'magical wand' in Photoshop.My images are always black and white (white background with car parts drawed in black). Given the x,y coordinate for a single black pixel in the whole image, the code should find (and paint with another color, say red) all other black pixels that are linked to that one, and so on, until all linked black points will be painted in red.This way, suppose that I have an image with 4 car parts drawed, then if I give the x,y coordinate of a black pixel, just THAT part to whose the black pixel belongs to should be painted in red. All other parts will remain black. Does it make sense?At the end, there are two pictures (before and after) to help understanding what I need to do to the images.I tried a simple 8-pixel adjacent approach for every pixel (starting on initial coordinate) but it turns out into a very stupid and endless looping algorhitm.
Code:
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
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I realize this post is rather long, but I wanted to give all the information up front instead of people having to ask me for more information.At the end of the re-installation of Visual Studio 2008, there is this message:
"Microsoft SQL Publishing Wizard: [2] Error: Installation failed for component Microsoft SQL Publishing Wizard. MSI returned error code 1638" in the log file dd_error_vs_procore_90.txt.
I have searched on Google for this whole message and found some references to this error, but I have done what they said worked for them and it did not fix the problem for me.When I searched for just "MSI returned error code 1638", I got that it cannot install something because it is already installed:"Another version of this product is already installed. Installation of this version cannot continue. To configure or remove the existing version of this product, use Add/Remove Programs on the Control Panel".In Add/Remove Programs I see these two programs:
Microsoft SQL Server Database Publishing Wizard 1.3
Microsoft SQL Server Database Publishing Wizard 1.4
Are these programs/versions what the error is refering to? Am I safe to remove them and depend on the similarly-named item which would be newly installed with Visual Studio 2008 - "Microsoft SQL Publishing Wizard"? I still use SQL Server 2000 and 2005 on my computer, as well as 2008. I had installed VS 2008 on my computer before without this problem and also have VS 2005 and 2010.
i am searching for gtalk open source code if anybody knows please let me know I need it urgently
View 1 RepliesI'm trying to make a -what i thought would be simple app.My intention was to build program that:1) i'd provide a grayscale image2) the program would count the black pixels the grey pixels the more grey pixels etc. (the hue) and the white3) would make the percentage sum of all pixels, that is: 300.000 black pixels (rgb 0 0 0) etc. given that 0 is the black, 100 the white. e.g a simple grayscale image is 55.2 white
This was my way and i don't think that is useful:
First of a button to convert the image to greyscale:
Dim bm as new Bitmap(source.Width,source.Height)
Dim x
Dim y
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Secondly, -and that's the stupid way- i did -or better i wanted to do- this: i put the code to dynamically create labels, each label having the colour of a pixel as background colour and as text the colour converted to rgb
The third step which i intended to do (i couldn't get pas two) was to sum up the labels etc.
actually this is not an vb.net code belongs to vb..i have written it for getting the data from com port 1.but i dont know what data the com port is getting..
Dim Lng As Long
Dim lpPoint As POINTAPI
Dim X, Y As Long
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Hello!
i have programming XML files using XSLT. but i cannot add a button or links so that i can come with another solution such <xsl: if test = "salary > 1000"> ... and so on.
someone told me that i can use PHP and ASP for that. but i am interest to do it on ASP.NET since i have used it before.
i am a little bit confuse on it. can someone show an example where i can use ASP.NET to display the XML files according to what we want? what programming language that need to be use? VB.NET?
it is necessary to use the XSLT in the coding?.
thanks in advance
- Nazirul
I usedthe following code
CODE:
But recieved an error
To create hyperlink ...what namespace shud i use?
I would like to display formation when a user place their cursor on a radio button, the information is about a sentence long giving a description about that particular button. I guess this is possible and should I be looking at code for a pop-up box.
View 7 RepliesI am trying to fire off an FTP of files. I have broken down the code to the barest minimum. I have used the Shell Command with success before but the solution is now evading me.
Sub Main()
Dim strGetFileCommand As String
strGetFileCommand = ("c:\Windows\System32\FTP.exe -i -n -s:getcash.scr 10.113.1.7>113Log.txt")
Shell ("cmd /c" & strGetFileCommand)
End Sub
I can run the command from the c:> prompt at the command line so I know that it is correctly formed.
I need to select random checkboxes in a Tree view,which are retrieved from Database.My project is windows based and using WPf.In the Attachment i got only trreview but not checkbox
Checkbox_in_treeview.txt (2.09K)
Number of downloads: 339
I was writing this VB script to run in HTML for school and ran in to a problem, which my debugger says it is at line 33?
<html>
<head>
</head>
<body>
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I created this ASP.NET Web application and I can't get the amoritization table(MonthlyPaymentBox) to loop correctly. I think the problem is somehow in my code I am setting the TotalLoan = 0, but I just can't locate where that is happening. I assume this because instead of of starting the current balance at the users input, it starts at 0.
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="WebApplication1._Default" %>
<!DOCTYPE html PUBLIC "-W3CDTD XHTML 1.0 TransitionalEN" "http:www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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Im very new and have found a solution which filter with on e grid but how do I manaipulate the Vb code to accomodate anothe industry filter.here's my ASP current code
<asp:GridView ID="GridView2" runat="server"
AutoGenerateColumns="False" CellPadding="4" DataSourceID="SqlDataSource2"
ForeColor="#333333" GridLines="None" DataKeyNames="Permit_No"
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I have a code in WFA as followslistviewmain.GetItemAt(MousePosition.X, MousePosition.Y)This used to work fine for WFA, but when I shifted to WFP, I get the error
Error48'GetItemAt' is not a member of 'System.Windows.Controls.ListView'.C:\Users\ameel\Documents\Expression\Expression Blend Projects\Media Library\Media Library\Window1.xaml.vb16959Media Library
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I want to execute a code after every 5 min.I am trying to develop the application in .net and using the C# as a backend language.My basic requirement is a C# code which executes after every 5min which i click a start button on my .net form.
View 6 Replieshow i can run .net framework on my pc tell me necessary requirements
View 3 RepliesI am using visual studio 2008 and i can't seem to rectify this error..it seems simple but i really can't seem to rectify this.What iam trying to do is pass the values of an initialized string array to an uninitialized string array using a loop..here's my code:-
Document ^doc = gcnew Document("Abdul.doc");
String ^yes = doc->GetText();
array<Char>^chars = {' '};
array<String^>^splitx = yes->Split(chars);
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I was just wondering if anyone had come across this issue before or anything. I just downloaded Visual Studios 2008 professional trial version (ISO) and when I try to run it or open it, I get a "The operation could not be completed. Access is denied." message. I tried doing everything.I disabled my antivirus, uninstalled a previous version of VS 2008, I still get this message.
View 4 RepliesI'm new here at Dream.In.Code, and this is my first question! To begin I would like to say I am new to Java but not new to coding, I am using Eclipse IDE 3.7 for Java and only have a basic knowledge of Java. I understand how it works; I don't know very much code... On to my question! I am wishing to create a simple JAR file for my own education/demonstration. Yet despite my searching and reading through my book I cannot find any relevant information about how JAR files are constructed. So, what defines a JAR file? How does one compile/make one?
P.S. I wish to work with JAR files because of their seeming simplistic nature and cross-compatibility. This is true, yes?My dearest apologies, I realise I posted this in the wrong forum. May a moderator move it for me?
I recently started working with Vb.net and I am just trying to create a class that has two properties one is StoreName and the other is StoreImage. What I am trying to do is figure out how to create objects using this class? Each object will be a Store that has a corresponding Name and Image to go with it. Here is the code I have written so far although I am not sure if im headed in the write direction with the function. Also not sure if it matters but I am using ASP with VB?
Imports Microsoft.VisualBasic
Public Class Store
Dim NameofStore As String
Dim ImageofStore As Image
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I have an internal ASP.NET / VB.NET CRM page that I would like to build additional functionality into.Currently we still use "Public Folders" in Exchange to store contact information for our clients.
What I would like to do is be able to connect to the Public Folders on Exchange through VB.Net in order to add new contacts or edit current ones.I would prefer to NOT have Outlook installed on the web server - (I say this because I tried working with Excel using COM and it was crap - ended up using Gembox.spreadsheet for all of my Excel needs).