System Memory In Bitmap - Using Bitmap To Show Picture Box Like Slideshow Using Timer

Jul 3, 2011

I'm using Bitmap to show picture box like slideshow using Timer. For each timer interval, I've to go for new instance of Bitmap, there System memory increases to 1MB, How to resolve this, 'BG is picture box

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tic Dim img As Bitmap

img = New Bitmap(System.Drawing.Bitmap.FromFile(FileIO.FileSystem.GetFiles

[CODE]...

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I'm trying to use a ToolTip directly to a Bitmap Object (System.Drawing.Bitmap), aparently I can't do this because Bitmap isnt a Windows Control.

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Jul 12, 2010

I'm having some problem. I try to create a 16bpp grayscale bitmap image and show in a picture box.

I used the following code

bmp = New Bitmap(xpixels, ypixels, Imaging.PixelFormat.Format16bppGrayScale)
dim bmp = New Bitmap(xpixels, ypixels, Imaging.PixelFormat.Format16bppGrayScale)
PictureBox1.Image = bmp

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I need to design the presentation in vb.net using picture box and timer.

Need to display the images on regular time basis.

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i'm using vb2008 .Net3.5, but i would prefer an answer that would also work in vb2005

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Out Of Memory With New Bitmap

Mar 29, 2012

The following code works with smaller images, but it throws an out of memory exception when the image is a png file, 8 bit depth, 13200x10234 pixels.

Using FS As New IO.FileStream(FileName, IO.FileMode.Open, IO.FileAccess.Read)
Dim B = New Bitmap(System.Drawing.Bitmap.FromStream(FS))
End Using

I'm working on a viewer that shows an image, asks the user for a window and saves the cropped image. Here is an overview of what I'm trying to achieve: The process starts with a 30+MB pdf file containing hundreds of large technical drawings. I open the file with the pdf reader, save as png 300dpi images, then I run my application that works on the saved images. I am interested on a few details of those drawings, and I have two goals:

1) Use my viewer with a subset of details instead of the pdf reader with the full set of whole images, and
2) Pick some cropped details and insert them into another application.

I start the application, look at the first image, click delete, and keep clicking delete until I find an drawing with a detail that I need. Then I draw a rectangle, save the cropped image, and repeat with 3-4 more details on the same image. Then delete the original image, go to the next, and restart the cycle. So I start with 100 large images in my folder and end with 20 small ones. At this point I can browse them very quickly and continue with the following steps (inserting them in another application).

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Add A Bitmap Image In Memory To A Page?

May 20, 2009

I'm trying to add an bitmap image in memory to a page using a System.Windows.Forms.PictureBox object, but it's not working. Here is my

HTML
Dim bytes As SqlBytes = reader.GetSqlBytes(0)
Dim image As Bitmap = New Bitmap(bytes.Stream)
Dim picBox As PictureBox = New PictureBox()

[Code].....

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Picture Box To Bitmap Webcam?

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1) I was making a tracking tracking application so that i can program my own
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Function GetCamImage() As System.Drawing.Bitmap
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[Code].....

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I am building an app that builds a bunch of cardinal splines by storing their PointF structures in arrays. As the program runs, new points are added to the arrays, and the graphics are drawn to a bitmap. I can let it run for ages and the splines just keep growing like they should with no problems. The amount of points in each spline can grow into the thousands. To speed up execution as time progresses, I don't completely redraw the splines after each pass, I simply draw the last segment of the spline to the bitmap, having let the bitmap 'record' the earlier part of the splines.

But if I pan across the scene or zoom in/out of it, then I DO have to completely redraw the splines, since the size and resolution of the display is limited to its dimensions. Panning works, no problem. But if I zoom in and out of the bitmap with the mouse wheel, after about 14 wheel clicks, I get an "Out of Memory" error. BUT...I have it set up so that whenever the mouse wheel turns, the graphics and the bitmap are disposed so that new ones can be built for the new zoom setting. So why would the program run out of memory when as far as I can tell, I am disposing of all my unused, unmanaged resources on a regular basis?

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Extraxct A Rectangle Bitmap From A Big Bitmap?

May 26, 2011

Here is a short program to demonstrate my question. I just want to extraxct a rectangle bitmap from a big bitmap.Code as follows:

Private
Sub Button3_Click(ByVal sender
As System.Object,[code]....

Execution stops when hitting the Dim cloneBitmap statement, which should have created a bitmap out of the rectangle cut out.The message is:

"MissingMemeberException was unhandled.

No default member was found for type 'bitmap"

I just don't get it. Seems that the method Clone(Rectangle, PixelFormat was not found.

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Parameter Is Not Valid - Bitmap Bmp = New Bitmap()

Feb 10, 2010

I have a grass image located here in my directory. I want to just create a Bitmap, but I am getting an error. (Parameter is not valid.) Immediate Window: A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll

[URL]

private void Form1_Load(object sender, EventArgs e)
{
Bitmap bmp = new Bitmap("grass.jpg");
}
bertino

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Jun 20, 2012

how to rotate,resize,crop any image and save it using vb.net ?

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Create A CachedBitmap From System.Drawing.Bitmap?

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is it possible to create a CachedBitmap from a System.Drawing.Bitmap within Visual Basic 2005 by using APIs ?

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I', working on a program where there are several projects within a solution. The solution contains a forms application, a couple of class libraries, and a public interface.I'm running into a strange problem where I can access the system.drawing.bitmap namespace from the main form and from one of the class libraries, but when I try to access it from the other class library or the interface, it tells me it is not defined. I've tried importing it, and calling it directly with no luck.

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here's my

Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
Dim colors(sizeX - 1, sizeY - 1) As Color

[Code].....

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[code]...

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PanelShowWrittenIconA.BackgroundImage = New Bitmap(PathA)

[code].....

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With this line...

If PictureBox1.Image = My.Resources._2star Then

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[Code]...

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I'm trying to use a timer to play a slideshow.
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
'playlist is a flowlayoutpanel
'pictures is also a flowlayoutpanel
'picturecheckbox is a custom control with a picturebox and a checkbox
'list is a general list(of string)
[Code] .....

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Private Declare Function LoadLibrary Lib "KERNEL32" Alias "LoadLibraryA" (ByVal strFilePath As String) As Long
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[code].....

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explain how Graphics.RotateTransform is working?

[Code]...

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[code]...

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