Fast Image Stitching - C# Discussion Boards

Muthuraj.M wrote:
storing retrieving values from database is that possible

The world would be in a mess if it wasn't.

Hello to everyone,

Maybe anyone can help me...
The szenario looks like this...

There is a Mobile Device with Windows CE, a WCF Service hosted in IIS on Desktop PC and a Sybase Database hosted on a different Server.

I have to connect the WCF form the Mobile Device and get the Data from the Database.

If i test it from localhost (ASP.NET Development Server) everythink works fine, and i recive the data from the Database. If i connect remotely i can also connect the WCF Service but if i try to connect the Database the client app throws a systemerror and i don't know why

Maybe a problem in the web.config I am greatful for any hint

HTML

<xml version="1.0"?>
<!--
    Note: As an alternative to hand editing this file you can use the
    web admin tool to configure settings for your application. Use
    the Website->Asp.Net Configuration option in Visual Studio.
    A full list of settings and comments can be found in
    machine.config.comments usually located in
    \Windows\Microsoft.Net\Framework\v2.x\Config
-->
<configuration>
    <configSections>
        <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
            <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
                <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
                <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
                    <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere"/>
                    <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
                    <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
                    <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
                </sectionGroup>
            </sectionGroup>
        </sectionGroup>
    </configSections>
    <appSettings/>
    <connectionStrings/>
    <system.web>
        <!--
            Set compilation debug="true" to insert debugging
            symbols into the compiled page. Because this
            affects performance, set this value to true only
            during development.
        -->
        <compilation debug="true">
            <assemblies>
                <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
                <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            </assemblies>
        </compilation>
        <!--
            The <authentication> section enables configuration
            of the security authentication mode used by
            ASP.NET to identify an incoming user.
        -->
        <authentication mode="Windows"/>
        <!--
            The <customErrors> section enables configuration
            of what to do if/when an unhandled error occurs
            during the execution of a request. Specifically,
            it enables developers to configure html error pages
            to be displayed in place of a error stack trace.

        <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
        <pages>
            <controls>
                <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            </controls>
        </pages>
        <httpHandlers>
            <remove verb="*" path="*.asmx"/>
            <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/>
        </httpHandlers>
        <httpModules>
            <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        </httpModules>
    </system.web>
    <system.codedom>
        <compilers>
            <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
                <providerOption name="CompilerVersion" value="v3.5"/>
                <providerOption name="WarnAsError" value="false"/>
            </compiler>
        </compilers>
    </system.codedom>
    <!--
        The system.webServer section is required for running ASP.NET AJAX under Internet
        Information Services 7.0.  It is not necessary for previous version of IIS.
    -->
    <system.webServer>
        <validation validateIntegratedModeConfiguration="false"/>
        <modules>
            <add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        </modules>
        <handlers>
            <remove name="WebServiceHandlerFactory-Integrated"/>
            <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        </handlers>
    </system.webServer>
    <system.serviceModel>
        <services>
            <service behaviorConfiguration="BooksServices.Service1Behavior" name="BooksServices.BooksService">
                <endpoint address="" binding="basicHttpBinding" contract="BooksServices.IBooksService">
                </endpoint>
                <host>
                &lt;baseAddresses>
                <add baseAddress="http://192.168.178.30:50501/BooksService.svc"/>
                &lt;/baseAddresses>
                </host>

                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
            </service>
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="BooksServices.Service1Behavior">
                    <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
                    <serviceMetadata httpGetEnabled="true"/>
                    <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
                    <serviceDebug includeExceptionDetailInFaults="false"/>
                </behavior>
            </serviceBehaviors>
        </behaviors>
    </system.serviceModel>
</configuration>

modified 19-Feb-15 2:21am.

Hello again!

I have an issue regarding a search function for a datagridview to my MySQL DB.

The code is the following:

C#

DataView DV = new DataView(dbDataSet);
DV.RowFilter = string.Format("Name LIKE '%{0}'", textBox1.Text);
dataGridView1.DataSource = DV;

Now the search kind-of works, but it only displays the data if the name I search for is completely written out.
For example, if I want to search for "John", I need to write "John", or else it will not show anything.

What am I doing wrong?

modified 19-Feb-15 10:54am.

I don't know about MySQL, it has been a while since I used it. MSSQL would require the Like statement Like this:

Select * From SomeTable Where Name Like '%John%'

This would return anything where John is in the middle of the string. Your example would return data where John is at the end of the string.

HTH

Jack of all trades, master of none, though often times better than master of one.

Thank you very much! Appears I needed another % symbol at the end of the {0}.
Works flawlessly now. Big Grin | :-D

j'ai essayé de faire un dataGridView pour visualiser des données a partir d'une database Oracle

voici mon essai : le datagrid est vide Cry | :((

mon table contient 7 champs et il est rempli par 6 lignes

C#

private void LoadGrid()
        {
            selection sel = new selection();
            sel.ExecuteSql("select * from fournisseur");
            sel.getDr();
            if (sel.getDr().HasRows)
            {
                while (sel.getDr().Read())
                {
                    dataGridView1.Rows.Add(sel.getDr()[2].ToString(), sel.getDr()[4].ToString(), sel.getDr()[5].ToString(), sel.getDr()[6].ToString());
                }
            }
        }

et voici la classe de connexion

C#

sing System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Oracle.DataAccess.Client;
namespace Gestion_Budgétaire
{
    public class Connexion
    {
        protected String cs="Data source=XE;User Id=system; Password=12345;";
        protected OracleConnection conn;
        protected OracleCommand cmd;
        public void ouvrir()
        {
            try
            {
                conn = new OracleConnection();
                conn.ConnectionString = cs;
                conn.Open();
            }     
            catch (Exception ex)
            {
                MessageBox.Show("Error Fatal!" + ex.Message);
            }
        }
        public void close()
        {
            try
            {
                conn.Close();
                MessageBox.Show("disconnected");
            }
            catch (Exception ex)
            {
                MessageBox.Show("Echec!" + ex.Message);

            }
        }
    }
    public class selection 
        : Connexion
    {
        private OracleDataReader dr;
        public OracleDataReader getDr()
        {
            return dr;
        }
        public void ExecuteSql(String re)
        {
                ouvrir();
                try
                {
                    cmd = new OracleCommand();
                    cmd.Connection = conn;
                    cmd.CommandType = CommandType.Text;
                    cmd.CommandText = re;
                    dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
                
         }   
      }
    public class mettre_a_jour 
        : Connexion
    {
        public void update(String reqSql)
        {
            ouvrir();
            try
            {
                cmd = new OracleCommand();
                cmd.Connection = conn;
                cmd.CommandType = CommandType.Text;
                cmd.CommandText = reqSql;
                cmd.ExecuteNonQuery();
                MessageBox.Show("DataBase Updated");
            }
            catch(Exception ex)
            {
                MessageBox.Show("error fatal" + ex.Message);
            }
        }
    }
}

SVP aidez moi Cry | :((

En Anglais SVP.

I'm pulling in images from a camera at around 300 frames a second and i'm stitching them together. I'm not even close to being able to keep up with the camera currently. I was hoping I could get some of the experts here at CodeProject to review my code and point out anyways to make the process faster.

Thanks

C#

 Bitmap currentStitch = null;
       private void StitchImage(object sender)
       {
           for (int i = 0; i < FrameList.Count; i++)
           {
               if (currentStitch == null) currentStitch = (Bitmap)FrameList[i].Clone();
               else
                   AddCurretnSlice(FrameList[i]);
           }
       }

private void AddCurretnSlice(Bitmap Slice)
       {
           Bitmap newStitch = new Bitmap(currentStitch.Width + Slice.Width, Slice.Height);
           BitmapData destinationData = newStitch.LockBits(new Rectangle(0, 0, newStitch.Width, newStitch.Height), ImageLockMode.ReadWrite, currentStitch.PixelFormat);
           BitmapData overlayData = currentStitch.LockBits(new Rectangle(0, 0, currentStitch.Width, currentStitch.Height), ImageLockMode.ReadOnly, currentStitch.PixelFormat);
           BitmapData sourceData = Slice.LockBits(new Rectangle(0, 0, Slice.Width, Slice.Height), ImageLockMode.ReadOnly, Slice.PixelFormat);
           try
           {
               int dstHeight = destinationData.Height;
               int src1Height = overlayData.Height;
               int src2Height = sourceData.Height;

               int src1Stride = overlayData.Stride;
               int src2Stride = sourceData.Stride;
               int dstStride = destinationData.Stride;

               int pixelSize = System.Drawing.Image.GetPixelFormatSize(sourceData.PixelFormat) / 8;
               int copySize1 = overlayData.Width * pixelSize;
               int copySize2 = sourceData.Width * pixelSize;

               // do the job
               unsafe
               {
                   byte* src1 = (byte*)overlayData.Scan0.ToPointer();
                   byte* src2 = (byte*)sourceData.Scan0.ToPointer();
                   byte* dst = (byte*)destinationData.Scan0.ToPointer();

                   // for each line
                   for (int y = 0; y < dstHeight; y++)
                   {
                       if (y < src1Height)
                           AVision.SystemTools.CopyUnmanagedMemory(dst, src1, copySize1);
                       if (y < src2Height)
                           AVision.SystemTools.CopyUnmanagedMemory(dst + copySize1, src2, copySize2);

                       src1 += src1Stride;
                       src2 += src2Stride;
                       dst += dstStride;
                   }
               }

           }
           finally
           {
               newStitch.UnlockBits(destinationData);
               currentStitch.UnlockBits(overlayData);
               Slice.UnlockBits(sourceData);

               currentStitch.Dispose();
               currentStitch = newStitch;
           }
       }

IMHO, you're better off saving the images to disk and stitching them in a separate thread (or even process).

/ravi

My new year resolution: 2048 x 1536
Home | Articles | My .NET bits | Freeware
ravib(at)ravib(dot)com

Thanks for the response, but that's not possible. The requirement is to keep up with the camera in real time.

The requirement is not technically possible under Windows. It is not a real-time system, and the OS may decide to freeze your threads when it sees fit. I'd also like to point out that 300 bitmaps/second would be a bit "much". How big is a single image? And how many seconds worth of those bitmaps would fit into the available memory?

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

Thanks for your reply, but I don't believe it's not possible. I'm up to processing a little over 200/second and I've never heard of the OS deciding to freeze my thread on it's own when it sees fit. Sounds like somebody might be used to blaming windows for shody code. Wink | ;-)

These bitmaps are from a line-scan camera, which means they are at most 10 pixels across. This has to be doable. I've got it dumping to an array now and another thread picking images up from that array. This works, but my stitch is a few seconds behind my camera when a record event fires. I believe i can get it to real time.

JBHowl wrote:
Sounds like somebody might be used to blaming windows for shody code.

Now, I don't want to split the thread into fibers, but..

http://en.wikipedia.org/wiki/Preemption_(computing)[^]

JBHowl wrote:
This works, but my stitch is a few seconds behind my camera when a record event
fires. I believe i can get it to real time.

You can push your computer to its limits, that is true. It will depend on your defenition of "real time", as Windows is no such OS, but still very powerfull - even without writing a new dedicated device-driver in an unmanaged language.

Can you store the "last" picture in a different place, and use that as a source for painting the display? A memory-mapped file might help - any fixed-size memory buffer that does not move around in memory would do.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

Instead of re-allocating memory for every "slice", I would look into pre-allocating enough memory for a "graphics" object that can hold all expected slices, and then overlaying / merging this with the slices; cropping the final result if necessary.

(see: Graphics class; FromImage() and DrawImage()).

Easy enough to benchmark without the camera (and third-party software).

Hey Gerry, thanks! That's exactly what I did and it works great except every now and then I run out of memory allocating my blank bitmap. You have to have enough continuous memory available and sometimes it errors out. See below, any thoughts?

//Here I occasionally get an parameter not valid error, especially if I have already created it once and i'm trying to recreate it
bmp = new Bitmap(100000, FrameHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bmpG = Graphics.FromImage(bmp);

private void frameevent_newFrame(bitmap frame)
{
//Draw the slice as it comes in using the bmpG object
}

any ideas?

"Bitmap" is an IDisposable.

When working with "images" (or any IDisposable), particularly a lot of them, you need to insure that they are disposed of in a timely manner; e.g.

C#

using ( Bitmap bmp = new Bitmap ... ) {
:
:
}

While not this exact problem (no camera was involved), I have stitched together map tiles for displaying in an application, that has relied on rapidly creating the images. If you know what the dimensions of the end image is going to be beforehand, then you can use Parallel.For to process the images and map them into the appropriate offset without difficulty.

sir,
can you please help me to run this project in visual 2010. do i need to install some plugins.. if yes then please guide. i'm not able to run it.

What project?

What in the hello world are you talking about?

There are only 10 types of people in the world, those who understand binary and those who don't.

Based on your earlier posts I am assuming you mean how can you run the code from the article A Simple C# Genetic Algorithm[^]

Please don't cross-post - you have already posted a question to the author in the correct forum - he is probably at work at the moment and can't respond immediately.

In answer to your question, you need to download the source and load it into Visual Studio. It is highly likely that VS will need to convert the source to the version that you are using - allow the automatic conversion to run through (it should not produce any errors).
Once you have the converted solution open,
- open up the Solution Explorer (Ctrl-Alt-L)
- right-click on the project name "GATest" and select "Set as Startup project"
- you can now run the code

Hello Gurus:

I'm having a difficult time selecting an item on a dropdown list using C# webbrowser controller. The website have this html code:

<select name="Searchbar_Inventory$ddl_condition" onchange="javascript:setTimeout('__doPostBack(\'Searchbar_Inventory$ddl_condition\',\'\')', 0)" id="Searchbar_Inventory_ddl_condition" style="width:90%;">
<option selected="selected" value="Product Name">Product Name</option>
<option value="Office">Office</option>
<option value="Product Category">Product Category</option>
<option value="Product Sub Category">Product Sub Category</option>
<option value="Received Date">Received Date</option>
<option value="Order No.">Order No.</option>
<option value="Sub Order Type">Sub Order Type</option>
<option value="Account Name">Account Name</option>
<option value="Status">Status</option>
<option value="Grade">Grade</option>
<option value="Serial No.">Serial No.</option>
<option value="RTS">RTS</option>
<option value="TDM">TDM</option>
<option value="Bus ID">Bus ID</option>
<option value="Traveler ID">Traveler ID</option>
<option value="Old Package No.">Old Package No.</option>
<option value="Product Properties">Product Properties</option>
<option value="Dismantle Date">Dismantle Date</option>
<option value="Heat/Job No.">Heat/Job No.</option>
<option value="RMA No.">RMA No.</option>

</select>

so part of my code to select a value was this:
webBrowserAdjustment.Document.GetElementById("Searchbar_Inventory_dll_condition").SetAttribute("value", "Traveler ID");

And it did not work...can you help me?

Elmer

See https://msdn.microsoft.com/en-us/library/system.windows.forms.htmlelement.setattribute%28v=vs.110%29.aspx[^].

I was looking at this article[^] on Threads vs. Tasks.

The end of the first paragraph says

Thread allows the highest degree of control; you can Abort() or Suspend() or Resume() a thread (though this is a very bad idea)

It is a bad idea and if so, why?

Thanks

If it's not broken, fix it until it is

The problem with suspending a thread is that you have no real idea of what it's doing at the point you suspend it. Imagine you have a process where you read a load of data into memory and then use this to do a bulk insert into a database on a thread and you've taken a lock on a table. Your code issues a suspend statement just after you've started writing to the database - you've now locked the table indefinitely. There are other cases where this technique is equally bad - you've suspended inside a locked mutex for instance.

The case against Abort is just as bad. The big problem with it is that it kills the thread at that point (that's the theory anyway - while it's not trivial, it is possible to produce code that prevents a thread being aborted - malware writers are fond of this). You have no idea what's going on at that point, so you have no idea whether the exit has left resources in a clean state or not.