Convert A Drawing.Bitmap To 4 Bit Grayscale?

Apr 17, 2011

I need to convert a Drawing.Bitmap to 4 bit grayscale. Is there any way to accomplish this? I've tried using Bitmap.Clone but I only get the usual infamous "Out of memory" exception. Would this be grayscale even if it managed to convert to 4 bit?

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Why Grayscale Bitmap Cannot Show In Picture Box

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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Use A ToolTip Directly To A Bitmap Object (System.Drawing.Bitmap)?

Dec 15, 2010

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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Error: Operator '=' Is Not Defined For Types 'System.Drawing.Image' And 'System.Drawing.Bitmap'

Aug 17, 2009

With this line...

If PictureBox1.Image = My.Resources._2star Then

I get this error: Operator '=' is not defined for types 'System.Drawing.Image' and 'System.Drawing.Bitmap'.Is there another way to say = with images?

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Drawing Over Existing Bitmap

May 20, 2009

I am having trouble overwriting an existing bitmap. I want to draw to a specified bitmap (union.bmp) even though this bitmap already exists. I keep getting a generic GDI+ error on the line "image.Save("C:/union.bmp")".

[Code]...

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Drawing A WebBrowser Control To A Bitmap?

May 17, 2012

I'm trying to save a panel control as a bitmap using the following code (VB.net):

Private Sub SaveFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles SaveFileDialog1.FileOk
filename = SaveFileDialog1.FileName

[code].....

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Create A CachedBitmap From System.Drawing.Bitmap?

Mar 29, 2010

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

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Type 'System.drawing.bitmap' Is Not Defined

Jun 15, 2010

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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Convert A Black And White Image In JPEG Format To A Grayscale TIFF Format?

Jun 5, 2011

Im looking for a class or code in VB.NET that can convert a black and white image in JPEG format to a grayscale TIFF format.

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Bitmap Drawing #2 - Make Something Identical To A Map-editor For A Game?

Feb 7, 2010

I don't want to spam the forum with questions, so I'll just ask a two questions I can't figure out in one thread since they all involve a specific task I'm trying to create I'm trying to make something identical to a map-editor for a game. Right now I'm just learning the basic functions of drawing on bitmaps. I'll show you what I got right now and then tell you what I'm trying to achieve:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim mySource As Rectangle
Dim myDestination As Rectangle

[code]....

So my map size is 1000x1000. When I press the button, it creates the map, draws 250 tiles(pixels) in the top left corner of the map, and then displays it on my form. Now to my questions: How can I zoom into certain X, Y positions on the map? After I zoom into the map, how can I call a function when I highlight a tile(pixel), and then another function when I click on a certain tile(pixel)?

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Taking A Screenshot As A System.Drawing.Bitmap And Send It Thorough A Network?

Nov 18, 2010

I'm taking a screenshot as a System.Drawing.Bitmap and trying to send it through a network as a byte array.If I take the original screenshot and simply save it to disk, it's about 200Kb.Instead I'm saving it to a memorystream so I can write that back to a Byte Array and it's coming out over 6Mb.

[code]...

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Change Image In Windows Forms App. System.Drawing.Bitmap In A PictureBox

Jul 19, 2010

I have a VB.NET Windows Forms app with a logo image on the form as a System.Drawing.Bitmap inside a PictureBox.I used the Visual Studio Designer to add the logo .bmp image so I don't currently have any VB code doing anything with it.I'd like to make the current logo a clickable object/button so when I click on it a file browser dialog opens and I can select a new image to replace the current image.The current image is a local resource and is set in a PictureBox as a System.Drawing.Bitmap.How would I replace that System.Drawing.Bitmap with a file selected from the file browser dialog?

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Convert An Object Form System.Drawing.Graphics To System.Drawing.Image?

May 23, 2009

Is it possible to convert an object form System.Drawing.Graphics to System.Drawing.Image?

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Convert System.Drawing.Graphics To System.Drawing.Image

Jan 20, 2010

I have a System.Drawing.Graphics g, which draw something in a PictureBox. Now I want to export this pGraphics to a new System.DrawingImage pImage (or Bitmap). But how?

Dim pImage As Bitmap
Dim g As Graphics
g = Graphics.FromImage(b)

[Code].....

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Convert System.Drawing.Graphics To System.Drawing.Image?

Mar 10, 2010

I have two graphics I'm trying to superimpose into one, then display in a DataGridViewImage cell...The Value property of a DataGridViewImage is an Image type.

Dim Image1 As System.Drawing.Image = imgl_Imagelist1.Images(0)
Dim Image2 As New Bitmap(imgl_ImageList2.Images(0))
Dim DualGraphic As Graphics = Graphics.FromImage(Image1)

[code].....

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Convert A Wpf Bitmapframe To A Bitmap?

Aug 11, 2009

how can i convert a wpf bitmapframe to a bitmap?

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Convert Bitmap To Icon?

Aug 19, 2008

How to make a bitmap to an Icon? I have an image with png extension and want to convert it to an icon.[code]...

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Convert Bitmap To Image?

May 1, 2009

This code resizes a jpeg image, but instead of saving it I simply want to display the result in a picturebox. I moused over the the image box and the value thumb and they seem to be different formats. How can i convert bitmap to image?

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Convert Bitmap To RGB In Program?

Feb 18, 2012

I have managed to take a screenshot of my computing using VB and I have stored it as a bitmap. I want to convert this bitmap (quickly!) to an array of rgb values.[code]...

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How To Convert Bitmap To Icon

Mar 10, 2010

I'm trying to make a solid colored icon in Visual Basic.Right now I make a Bitmap, convert it to a Graphic in order to add color, convert it back to Bitmap, and then try to convert it to an icon.Unfortunately I cannot find any way to convert the final Bitmap to an icon. Can anyone help me with this? Alternatively does anyone have a different way to generate a solid colored icon? [code]

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How To Convert Byte To Bitmap

Oct 7, 2009

How to convert byte to bitmap
Dim ScreenshotBytes As Byte() = MySQLExecuteReader("SELECT Screenshot FROM Connections WHERE Connection='EC8C35F2'", "Screenshot")
Dim ScreenshotMemoryStream As System.IO.MemoryStream = New System.IO.MemoryStream(ScreenshotBytes)
[Code] .....

But I don't know how to get the bytes from the mysql server:
Public Function MySQLExecuteReader(ByRef StrCmdText As String, ByRef StrColumn As String)
'On Error Resume Next
Dim MySQLComm As New MySqlCommand(StrCmdText, Connection)
[Code] .....

I want to return the byte from the column: "Screenshot" which is an image (MEDIUMBLOB) so I can use it as a background for a picturebox.

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How To Convert Picturebox To Bitmap

Nov 18, 2011

I want pixel color value of the picturebox I assigned text to the picturebox & now want to get the value of color of each pixelWhat is method of picturebox or i should convert it to bitmap? How?in vb6 there is getpixel() method to get color value

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VS 2008 Convert Bitmap To JPG

Jan 21, 2010

I borrwed some code to capture a image with the onboard Web Cam of my Laptop. It works fine, but is is saving the image as a Bitmap, how can i convert the image to a JPG file? [code]

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Declare An IPicture And Then Convert It To A Bitmap?

Feb 19, 2011

I am using a custom API call that returns an IPicture. I'm trying to declare an IPicture and then convert it to a Bitmap.

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Extract Icon From Exe And Convert To Bitmap?

Jun 21, 2009

After scouring the forums for a code to extract icon from exe and convert to bitmap, i got that working, and the image will display on my form just fine. I want to save the image so it can be loaded again after the program is closed, but I get "Generic error in GDI+ occurred" when I attempt to save the bitmap.


Dim ExeIcon As Icon
Dim button1icon As Bitmap
ExeIcon = System.Drawing.Icon.ExtractAssociatedIcon(Filename)
button1icon = ExeIcon.ToBitmap()
Button1.BackgroundImage = button1icon
button1icon.Save("C:utton1icon.png", System.Drawing.Imaging.ImageFormat.Png)

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Forms :: Convert Form To A Bitmap?

Dec 27, 2004

Is it possible to convert a form to bitmap. Actually i have a form on which different things( labels, grapg etc) are drawn at run time. So what i want is that when everything is drawn it is converted to a bitmap. i tried myBmp = me.creategraphics but it didnt work

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How To Convert Packed DIB Pointer To Bitmap

Nov 13, 2011

I've searched all day and did not find any for vb language this my code,but it does not work.[code]I can add a bitmap to stream and see the results with Windows Media Player [code] but I do not know how to convert Dib ptr to a bitmap or hbitmap.

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Convert Bitmap To Icon Using Binary Data?

Feb 21, 2011

I would like to convert an Bitmap image to an icon in VB.NET but I have to use the binary data of each to somehow accomplish that. Doing research on Bitmap I found how the files are structured. I know that bitmaps have the Bitmap Filer header, Bitmap infoheader, and the colorallet. Each of these contain a certain amount of bytes, and I a have to get these from the bitmap file. The icon header and info header are similar to the bitmap. I know that there are libraries in VB.NET that do that easily, butthis is for a project for school and I am not supposed to use that. I just want to ask how

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[vb2010] Convert A Bitmap Into A String Array?

May 13, 2010

My goal is to find the fastest way to convert a bitmap in a one-dimensional string array, where black pixels have to be converted in "X" characters and every other pixel in blank characters.My present attempt is to use a code like:

[code]...

But the Cpu usage is excessive, and the elaboration time too (I have to convert one Image by second).Can someone suggest a much more fast method, maybe using some Api??

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Convert Graphic On A Form To Bitmap Or Something Else I Can Post On A Webpage?

Apr 13, 2010

I designed a complicated graphic that draws on a Visual Basic screen. But how can I transfer the image to a bitmap or some other format that I can post on the Internet? I've tried the XAML editor in Microsoft Expression Web but people don't like downloading Silverlight, at least that's what they tell me.

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