VS 2010 LockBits Or GetPixel?
May 30, 2012Which would be better to use if I want to find one pixel?
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VS 2010 LockBits Format32bppArgb?
Mar 6, 2011My blurring results have been somewhat strange lately, so I tried this simple test to see what the ARGB order is when using LockBits. When I run this
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim bmp As New Bitmap(1, 1)
Using g As Graphics = Graphics.FromImage(bmp)
g.FillRectangle(New SolidBrush(Color.FromArgb(&H11, &H22, &H33, &H44)), New Rectangle(0, 0, 1, 1))
End Using
[Code]..
VS 2010 Use GetPixel In A Different Way?
Feb 28, 2012Is it possible to use GetPixel in a different way? I want to use it like:
'If GetPixel(x,y) = COLOR Then
Loop Until GetPixel(x,y) = DIFFERENT COLOR
Something like that...
VS 2010 GetPixel Not Working
Mar 3, 2012[code]Well, the first GetPixel works fine, it sets textbox2 to yellow if the pixel is ofund and textbox1 says green. But, the second GetPixel doesn't work. The coordinate are correct and the color is also, but I never receive the msgbox.
View 28 RepliesVS 2008 LockBits Different In VB Than C#?
Mar 23, 2009When I converted small application from C# to VB, a little problem appeared. Method, which used to take 110-120ms, started to work about 500ms (and it's very big difference for this kind of application). So, I've made detailed comparison, and here is the result:
[Code]....
Using Lockbits And An ASM DLL - Unexpected Error
Nov 29, 2009In duplicated code using Lockbits in VB to obtain the address of Bitmap.Scan0, the first is OK, in all applications, but the second NEVER is. What is the explanation please? Surely both StartAddrA and StartAddrB should be valid pointers to Bitmap.Scan0 for calls to valid, functional ASM code in the functional DLL. The error is, it seems, in the VB Lockbits process. Using VS2010 Beta 2 and XP.
[Code]...
VS 2005 LockBits Has Different Effect?
Jan 13, 2010I've made an Aero-style form header (see signature) and I wanted to speed it up, so I used LockBits, and it had a different effect. These two methods should do the same thing, right? Well, it doesn't. Image 1 is before LockBits, Image 2 is after. Using LockBits gives a streaking effect that I don't like.[code]
View 5 RepliesVS 2008 Lockbits Not Working
May 22, 2010I have this code to blur an image (a rewritten one from my Vista Forms project):
[Code]...
And it works fine for blurring a picture, but when I pass it a rectangle (and I know the rectangle is correct), it ends up stretched and very thin. I've attached a screen-shot of it "working". The red rectangle is the rectangle I pass, and the warped sort-of red area is where it seems to be blurring.
VS 2005 Blur With LockBits Not Working?
Dec 23, 2009I tried using LockBits to blur images, since I heard it was faster, and there's no error, but there's no blur either. It doesn't do anything. The commented-out code is the code I had before using LockBits, and it works.
vb.net
Private Sub BlurImage(ByVal img As Bitmap, Optional ByVal radius As Integer = 3, Optional ByVal blur_bounds As Object = Nothing)
Dim bb As Rectangle
[Code]....
GetPixel API On Picturebox?
Aug 6, 2009I'm having trouble getting the pixels of a Picturebox. My code is as follows:
Option Strict Off
Option Explicit On
Imports VB = Microsoft.VisualBasic
Imports System.Runtime.InteropServices
[Code]...
The program is supposed to load a picture, and then get each every pixel on the first line, adding the HEX color code and a "," to the richtextbox. At the last pixel of each line, it adds a ";" and skips to the next line, repeating the process until all processes are read. I've done this successfully by creating a new bitmap and using the .GetPixel from that, but that is terribly slow. Will this be faster? If not, is there any other API I could use that is faster?
Getpixel Is Not Working?
Nov 28, 2010Look at this code, it's so simple, yet I can't manage to get it to workon the top of form1 is
Option Strict On
Imports System.Drawing
Imports System.Drawing.Drawing2D
[code].....
How To 'getpixel' For 32 Bit Float
May 18, 2010My program works through each cell in a raster bitmap loooking at the r g b values. Actually I'm just working with greyscale so r = g = b. I use the get pixel method to return the 8 bit value of each pixel (0 - 255). However I'm now working with a single channel 32 bit float bitmap. I can't load it into VB. I tried Dim myBitmap As New Bitmap(OpenFileDialog1.FileName) but this fails with an unspecified error when trying to open a 32 bit tiff.
The question is: which graphics format will allow me to load a 32bit bitmap into VB, and if I succeed will the getpixel method return 32bit float results for the greyscale level for each pixel?
How To Use Getpixel And Setpixel
May 18, 2010I have a icon maker program. I have two pictureboxes pic1 and pic2 and a open image button. I need a code that will if the pic1.image color has any red in it, it will take that red and turn it into the desired color. I know you can use getpixel and setpixel but I don't know how to use these.
View 13 RepliesWhy Is It That The Cint() Is Only Used For Pic.GetPixel(X,Y).R) And Not For The Others
Jul 22, 2011i need some help on explaining to me whats going on in the code below. Basically, the code below is used to convert a bitmap image to grayscale level (black and white).
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim pic As Bitmap
pic = picVisible.Image
Dim X As Integer
[code].....
what i dont understand is the part;
color = (CInt(pic.GetPixel(X, Y).R) + pic.GetPixel(X, Y).G + pic.GetPixel(X, Y).B) / 3
why is it that the Cint() is only used for pic.GetPixel(X,Y).R) and not for the others ? Any Image processing expert that can help explain this ?
Note: The code works well and manages to convert an image into its grayscale.
Faster Than Getpixel Setpixel VB?
May 23, 2012I worked in a role and functioning properly. The problem is that it is a bit slow for use in many images would be very slow. I read online that with stride and scan0 and working in memory with buffer can be made faster, but i donīt understand anything . Does anyone know how it works or how to make my code run faster?
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GetPixel Color From A Picturebox?
Apr 17, 2009i am working on a project in vb.net 2003 and i want to get the color of a pixel when i click on the image loaded in the picturebox.i ve tried anything but nothing seems to work....
View 15 RepliesSomething Faster Than Bitmap.getpixel?
Apr 24, 2010What I'm trying to do is iterate through each pixel in a bitmap, and get the color value of each pixel.I've tried using .getpixel, but it's fairly slow. On a 640x480 image, it takes roughly .35 seconds to go through it. Which can add up if doing many pictures.
[Code]...
Getpixel And Mouse Click Program?
Mar 13, 2009Im trying to make a program that will automatically send a left mouse click on the current mouse position using a getpixel trigger. The one i made will wait for the pixel color to change and it will trigger the next timer to monitor if an indicator hits the middle of the bar.
This is the example of the bar waiting for a color change:
This is the example of the bar when the indicator comes out
[Code]...
Memory Leak Using GetPixel/GetDC In VB?
Apr 6, 2012I have a timer that among other things, checks 5 spots on the screen for a color change. My program monitors a phone system app and checks to see if there is a new incoming phone call from any of 5 buttons. I'm using the following code based on another question I had posted. Monitor an area of the screen for a certain color in Visual Basic
Private Function CheckforCall()
Try
Dim queue1 As Integer = GetPixel(GetDC(0), 40, 573)
Dim queue2 As Integer = GetPixel(GetDC(0), 140, 573)
[code]....
Using this code, GDI Objects skyrockets very quickly and within short order, throws an OutOfMemory exception. I'm assuming I'm not releasing the DC properly, but I can't seem to find any other way to do it.
Find The Colors Of Pixels Using GetPixel(x,y) With Bitmaps?
Oct 12, 2010I'm trying to find the colors of pixels using GetPixel(x,y) with bitmaps.
I understand how to use it and it works.
When I use .ToString I get the string version of the color.
Now when I use .ToArgb I get a negative number and the colors are backwards?
16777215 should be white and 0 should be black.
This is an example of some results:
-16273900 is showing close to black and -32567 is showing close to white.
Getpixel + Printwindow : Getting A Pixel From A Program That Is Not Focused?
Jul 21, 2009what i have been trying to get to work is getting a pixel from a program that is not focused (so minimized). I tried Getpixel but only got it to work when the window is active(focus). It seems it only works for active window.Then i thought making a temperately screenshot of the program and get the pixel. I came across PrintWindow. Right now im searching to make a temperately screenshot of a minimized program and read the pixels of it. So far i had no success.
View 1 RepliesPicture GetPixel And SetPixel: Include Alpha?
Jan 6, 2011I am trying to use GetPixel and SetPixel to copy the contents of one picture to another (I know there are other methods to do so, but there are reasons I want to try this ;D)Anyway, the pictures are .png images, so they include transparency settings.
But for some reason, it seems like when I use GetPixel & SetPixel to put one image over another, it seems the second image completely replaces the other one. I mean, it seems the transparency settings are not respected when I use GetPixel & SetPixel.Both images have the same size. Both have transparent areas.
VS 2008 - GetPixel Moves Mouse To Wrong Color
Dec 5, 2009I get no compile/debug errors. When I opened it, and tested it on this site, it doesnt move the mouse to 255, 0, 0 (red). it moves it to 128-128-0.
Try
Dim dc As IntPtr
Dim screencolor As Integer
If myHandle <> IntPtr.Zero Then
dc = GetDC(myHandle)
Dim XPos As Integer = Cursor.Position.X
Dim YPos As Integer = Cursor.Position.Y
[Code] .....
VS 2008 GetPixel Moves Mouse To Wrong Color?
Apr 23, 2010I get no compile/debug errors. When I opened it, and tested it on this site, it doesnt move the mouse to 255, 0, 0 (red). it moves it to 128-128-0.
Try
Dim dc As IntPtr
Dim screencolor As Integer
If myHandle <> IntPtr.Zero Then
[code]....
VS 2008 In Directx Full Screen Game GetPixel
Aug 20, 2010in Directx Full Screen Game GetPixel Function Not Working (#000000)
View 2 RepliesInterface And Graphics :: Get The General Color Based On What Is Returned From Bitmap.GetPixel()?
Aug 28, 2009how can i get the general color based on what is returned from Bitmap.GetPixel()? Like i want all shades of blue to just be blue, and so on
View 10 RepliesVS 2010 Visual Basic 2010 And Crystal Reports 2010?
Oct 2, 2010When trying to import CrystalDecisions.CrystalReports.Engine, and CrystalDecisions.Shared. I'm getting a green line. What might be the problem?
View 3 RepliesVS 2010 Involved VB 2010 And Visual Studio 2010 (WPE PRO)?
Jan 8, 2012I'm new to visual basic, used it for a few months. My friend is addicted to using a program called Wpe Pro [URL].. and he wanted me to make it more advanced and able to do more stuff.if you no anything about this program please message me
View 5 RepliesVS 2010 .Net 2010 Program .exe Wants Excel 2010?
Aug 4, 2011VB.Net 2010 program .exe on PC with Excel 2007 gives error when cannot find Excel version 14, which is Excel 2010 I have developed a program in VB.Net 2010 which reads from an Excel spreadsheet. It works fine in the IDE on my computer. I built an .msi and executed it on my computer. I get "Error: 53 - Could not load file or assembly 'Microsoft.Office.Interop.Excel, Version=14.0.0.0, Culture=neutral,PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified."
The only version of Excel on my computer is 2007, which is version 12.0.6557.5000. The version the error says it needs, version 14, is actually the version of Excel 2010.I have put in MsgBox statements to find where the error occurs.
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Visual Studio 2010, Outlook 2010 And Windows Application, Return Emails?
Jan 5, 2011At present I have wrote an application (in-house CRM, vb .net 2010) which allows me to send emails under the selected customer & I categorised these emails.As these are categorised I can return data to display email history in my program by using search criteria:
Dim oMail As Outlook.MAPIFolder = oNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderSentMail)
Dim sSearch As String
sSearch = "[Categories] = '" + "[" + tAccount.Text.Trim + "]" + "(" + tShipTo.Text.Trim + ")'"
Dim oItems As Outlook.Items = oMail.Items.Restrict(sSearch)
However the limitation to the above is it only looks at sent items & no other folder.My ideal solution would be to display all email correspondence for a certain contact.