Create An Image From A Graphics Object?
Sep 30, 2009Is there a way to create an image from a graphics object?
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How To Create Image Based On Graphics Object
Feb 26, 2012In VB.NET, I need to create an Image based on a Graphics object I have. However, there is no method such as Image.fromGraphics() etc. What should I do then?
View 2 RepliesVS 2008 Create A Bitmap Object From A Graphics Object?
Jun 3, 2009i have drawn on a e.graphics object and now want to transfer the drawn stuff onto a bitmap object how can i do this?
View 2 RepliesError: A Graphics Object Cannot Be Created From An Image
Jun 6, 2011I have a scanned document in my system. It's a tiff file. You will see below the code i have written. The problem is that i get an error message. The message is like this "A Graphics object cannot be created from an image that has an indexed pixel format." [Code]
View 3 RepliesVS 2008 Draw Rotated Image On Graphics Object?
Jun 1, 2010I know that you can pass a Point array to the DrawImage method of the Graphics object to apply rotation, skewing and flipping, but I'm having trouble figuring out how to calculate the rotation. So far I've got:
Dim radius As Integer = Math.Sqrt((rect.Width / 2) ^ 2 + (rect.Height / 2) ^ 2)
Dim dX As Integer = RadToDeg(Math.Cos(DegToRad(angle))) * radius
Dim dY As Integer = RadToDeg(Math.Tan(DegToRad(angle))) * dX
Dim new_upper_left_corner As New Point(rect.X + (rect.Width 2) - dX, rect.Y + (rect.Height 2) - dY)
This is all just off the top of my head so far, I'm not sure if it's right. How do I calculate the other points on the rectangle, and is there a built-in VB.NET method that's much easier? (Apart from Graphics.RotateTransform, which is slow and also rotates around 0,0.)
Create Graphics On An Image In A Picture Box?
May 25, 2009I am creating an application where when I click on an image I need to mark the place using the x and y co-ordinates given by the click and then after marking I put a red dot/circle on that spot and then I need to save this image to a file including the dot/circle I marked. I have tried saving the image to the file but to no avail, I have been able to only save the PictureBox image and that doesn't include the graphics. It is only the base image. I have tried to save it as a bitmap but have not gotten anywhere with that either. It seems whenever I call the image.save it takes only the value of the underlying image and saves it.
Private Sub BtnCreate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnCreate.Click
pointmarked = False
[Code]......
Create Persistent Graphics On Top Of An Image?
Mar 1, 2011I am building a program which offers solutions to the travelling salesman problem (finding shortest tour between a set of cities while visiting each only once).
My program loads a bitmap image of a map into a picture box. From there, graphics which point out the cities as well as tour paths are drawn onto the map. My problem is that when the option to plot ALL cities is enacted, the user may choose to pinpoint a specific city with a separate control. When the user erases that pinpoint via an invalidation routine, though, it erases all graphics beneath it, which is undesirable. How can I make my tour graphics and city plots semi-permanent by drawing them directly on the image? I tried drawing them on a separate bitmap, but it 'covered up' the map image.
VS 2008 Choppy Font Edges When Transfering Image From A Bitmap To A Graphics Object?
Jun 3, 2009i am drawing a string to a graphics object in the eg below and then transfering it onto a e.graphics in the paint event of a panel... when doing this the font edges appear dodgey...
Here is some
Dim b As New Bitmap(100, 100)
Dim g As Graphics = Graphics.FromImage(b)
g.DrawString("Bla Bla Bla", New Font("Comic Sans MS", 18,FontStyle.Bold), New LinearGradientBrush(g.ClipBounds, Color.Red,
[code]....
Interface And Graphics :: Create An Object And Make It Visible?
Dec 28, 2009I tried to create a lineshape and make it visible when a timer ticks. Also tried to set everything that would matter when creating it(border colors and thickness etc)
But still, I got no results.
Code:
Dim line = New Microsoft.VisualBasic.PowerPacks.LineShape(CX, CY, ccx, ccy)
line.Parent = New Microsoft.VisualBasic.PowerPacks.ShapeContainer()
line.Enabled = True
[Code]....
Interface And Graphics :: Create A Table As Displayed In The Image?
Nov 19, 2011I want to create a table as displayed in the image in VB.net. How do i do it ?? I tried LISTVIEW with Gridlines, but it has both horizontal and vertical lines, but in the image there is only Vertical lines.
View 2 RepliesInterface And Graphics :: Create An Image That Is To Mimic A Single Clock Rotating Hand Within A Square Area?
Aug 20, 2011I have to create an image that is to mimic a single clock rotating hand within a square area,and the user has to choose the width and speed of the rotation and the direction.i managed to create the square area with a hand inside,with this codes and variables,
(Dim Mygraphics As graphics = e.graphics
mygrqaphics.Draw Rectangle(pens.color x1,x2,y1,y2)
mygraphics draw line(pens.color,x1,x2,y1,y2),now i have to find codes and variables to rotate the hand or line within a square area.one point remaining constant the other moving.
Create Image File From MS Access OLE Object Column?
May 21, 2009An OLE Object column contains images but the image type (jpg/gif/tiff) is unknown. These images need to be extracted from the DB and saved to disk. The application is primarily using VB.NET but C# examples are welcome too.
View 3 RepliesConvert An Object Form System.Drawing.Graphics To System.Drawing.Image?
May 23, 2009Is it possible to convert an object form System.Drawing.Graphics to System.Drawing.Image?
View 4 RepliesDetect Collision Between A Graphics Object And Picture Object In Program?
Oct 20, 2011I am making a lunar lander game that randomizes the terrain for each new game, so each game is different. For my game, I am creating a graphics object that draws a closed curve for the terrain of the game. I am trying to then detect if a picture object collides with the graphics object.[code]...
View 1 RepliesInterface And Graphics :: Keep Graphics Over Image
Oct 28, 2011I load my picturebox with a jpeg. If I put my DrawObjects() sub into picturebox paint event.When ever a picturebox.refresh or picturebox.visible = true (vb.net seems to draw my DrawObjects() first, then load the jpeg Image over my drawing - erasing drawing) Is there a way to get the picturebox to redraw the jpg image first then draw on it, in picturebox paint event?
View 10 RepliesImage.Save And Graphics.DrawString And Image Resolution?
Nov 13, 2011I'm a VB beginner.I've been playing with Graphics.DrawString by watermarking a picture with a text string. The picture below to the left comes from PictureBox with a text string drawn with Graphics.DrawString. The font style used is Arial 48 points, regular, I think. The picture in PictureBox shows just as I configure. Great... The resolution of the original Terri Hatcher picture is 300 dpi (300 x 300). Exporting this picture with Graphics.DrawString, I get the picture below to the right. The text string appears a lot bigger than previously shown in PictureBox. It turns out that the text size varies, depending on the resolution of the original picture. That's kind of odd. I develop several graphics applications in a different environment and have never seen this sort of graphics.drawstring thing. Anyway,
my sample application seems to draw a text string at an image resolution of
[Code]...
C# - How To Copy One Graphics Object Into Another
Feb 27, 2009I am trying to copy the contents of one graphics object to another, but the only was I have been able to find is based on using GDI32.DLL, which i would rather avoid using if possible.Does anyone know how/if this is possible using managed code? I don't mind if answers are in C# or VB.Net.
[Code]...
Draw An Image With The Graphics?
Nov 1, 2009I have a very annoying problem, I am trying to draw an image with the Graphics class but when I do DrawImage, it automatically scales it up! heres some example code
graphics.DrawImage(My.Resources.TestImage, 20, 20)
PictureBox1.Image = My.Resources.TestImage
The picture box image is the correct size whereas the graphics drawn verison is too big!
Get Image From Graphics Handle?
Feb 24, 2009I made a program that uses the graphics object to draw on a picture box. I used the graphics.fromhwnd(picbox) to draw on the control. The problem is if I minimize the window the drawing disapears. Might there be a way I can the image from the picbox and save it to a bitmap variable ?
View 1 RepliesInterface And Graphics :: Possible To Do Image Map
Apr 4, 2011Just want to know if it is possible to do an image mapping in VB2010?..
View 3 RepliesCorrect Way To Pass The Graphics Object?
Oct 2, 2009When I do my form_paint event, I have quite a lot to redraw, so I'm breaking into into severals subs to make it easier to read. I'm passing the 'e' variable into my subs as shown below, is this correct?
Private Sub frmMain_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
DrawMap(e)
End Sub
Private Sub DrawMap(ByVal e As System.Windows.Forms.PaintEventArgs)
End Sub
Am I right in copying that whole 'e as system.windows....' etc line from the form_paint details into my subs details?Just to clarify, the sub will draw directly onto the form.
Determine Whether Graphics Object Is For A Printer?
May 11, 2009We would like to know whether there is any way to interrogate a Graphics object and determine whether it is to be used to print or to render to some other canvas. We're aware of an API call that can be used but would prefer to avoid that route if possible. There's also the possibility of simply passing a flag in with the Graphics object that is True from a PrintPage event handler and False from elsewhere, but that's not ideal either. We're looking for a managed property or method accessible via the Graphics class itself, but nothing's jumping out.
View 20 RepliesDrawing Spirals Using Graphics Object?
Feb 20, 2009I have been trying to draw spirals in vb.net. Here's a link to the formula [URL]. here's what I was trying to do. The code below is just drawing points which I was later going to edit to connect from point to point as soon as i got the spiral function working.
Function Draw()
Dim iImageCenterPointH As Integer = pbOut.Height / 2
Dim iImageCenterPointW As Integer = pbOut.Width / 2
Dim iCircleSpace As Integer = 10
[Code] .....
I am not 100% the output is matching the formula here's what I am getting atm ...
VS 2008 Zooming In On A Graphics Object?
Aug 31, 2011I need serious advice here please. I use Visual Basic Graphics Programming by Rod Stephens as a reference, and I have visited his site vb-helper.com to try some of his tutorials. I tried the scribble application and it's working out fine (you can download the snippet from his site).
What I have trouble with is zooming in. I am not sure where to start. I would like to zoom in to x2, x3 and etc. of the bitmap I am working on and I would like to be able to continue to edit the bitmap. This would mean that I have a larger pixel brush under the mouse cursor, to lay down pixels. So a x2 zoom would mean a 2 x 2 pixel.
Has someone done this. Do you have a reference I can use for this. This kind of editing is standard in almost every paint package. Even Microsoft Paint, but there is not too much basic information on how it fits together in code for vb .net. So I am looking for someone to point me in the right direction. As I said, I am using the scribble application as a base, so here is the link. [URL]..
FAQ: Draw An Image Respectively On The PictureBox Control And Image Object?
Apr 10, 2009How do I draw an image respectively on the PictureBox control and Image object? Welcome to the All-In-One Code Framework! If you have any feedback,
View 1 RepliesGraphics Wrong Image Interpolation In .Net?
Oct 4, 2011When working with small images, the graphics interpolation does bad work.the result image in the following code does ignore second half of image to draw.Draw something on the image by using loadimage from JPG or whatever you want.
Dim GrayImage as system.drawing.Bitmap(640,480)
Dim bmTmp As New System.Drawing.Bitmap(GrayImage.Width, 1)
Using gr As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(bmTmp)[code]....
The second half vertical is not drawn by using the DrawImage methode. I want to have the image as result as you see on first picture. Stretched image with source on whole content.
Interface And Graphics :: How To Rotate An Image
Aug 21, 2011I can get the image to rotate the problem is that on every step throught the loop the image goes to it inverse or draw backwards.
Code:
Public Class Form1
Public K As New Grid_Tiles
Public D As Integer
[code]....
Interface And Graphics :: Rotate A Jpg Image?
May 28, 2009I have an application that downloads a .jpg snapshot from an IP camera, writes it to the server hard drive, attaches it to an email and sends it out to my users. Pretty simple until one guy had to mount his camera upside down and that's how he received the image via email.
It gets a bit annoying after a while, so he asked me if I could rotate it 180 degrees before attaching it to the email. I have absolutely no idea - hence my post. The app is on a hosted ASP.Net v3.5 web server.
VS 2010 : Get Raw Data Of Graphics Image?
Feb 6, 2012get the raw data of zoomed image in a picture box. But I am zooming the image using,e.Graphics.DrawImage(Picturebox.Image, New Rectangle(ZoomXCordinate, ZoomYCordinate, ZoomWidth, ZoomHeight)).Now I am not getting how to get the raw data of zoomed graphics image displayed on the Picturebox.I am actually trying to get the image data into a byte array.
View 5 RepliesFloodfill With A System.Drawing.Graphics() Object
Jun 7, 2011I need to make a basic drawing program in VB that can do three things:
"Draw" with a brush of some sort
Clear the screen
Perform a flood-fill (paintbucket action)
I decided to do the first two tasks first, and got them to work, but the third task completely eludes me. Every way I try seems to pile on exceptions, and every flood-fill algorithm I find seems to require a bitmap, rather than a Graphics() object. Is there any way to accomplish a flood-fill using a Graphics object, or must I restart the project using a bitmap?
Source code for reference:
CODE: