VS 2008 Converting A Color Image To Grayscale?
Jul 16, 2009I've been wondering if converting a color image to grayscale will reduce it's size?
And also wondering how to convert the image to grayscale?
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Interface And Graphics :: Converting Image To Grayscale?
Dec 10, 2010I'm creating a Image viewer and was wondering if anyone could help me with resizing an image, and converting the image to grayscale? My knowledge of visual basics is very limited so any code snippets.I am wanting to resize the original image to a 3 x 3.
View 1 RepliesConverting An Image To An .ICO File Without Loosing Color Depth?
Sep 2, 2011In a form I have an ImageList named MainLogoImageList containing a 100x100 pixel 32-bit colordepth image. That is my app logo.
I am too lazy to set up an icon editor and edit an icon of that logo, or convert the image to an .ICO file. (Ergh, well, I am not allowed to install custom utilities.)
To set my forms' icon, I use
Icon = IconFromImage(MainLogoImageList.Images(0))
in the OnLoad event handler to set the window icon.
In my about box, i have a PictureBox with no image. In its OnLoad event, I use
LogoPictureBox.Image = MyMainForm.MainLogoImageList.Images(0)
Icon = IconFromImage(MyMainForm.MainLogoImageList.Images(0))
to set the About box's icon and content.
So far, so good, the icon looks pretty good for a being created from a 100x100 pixel bitmap.
Is there an easy "no utility required" :-) way to get the icon that is returned my IconFromImage saved into an .ICO file so that it will keep the color depth when loaded as the app icon? I want to use exactly the icon that IconFromImage creates.
Saving it using
Dim S As New FileStream("MyAppIcon.ico", FileMode.Append, FileAccess.Write, FileShare.Write)
Icon.Save(S)
S.Close()
in the main form's OnLoad event handler and loading that .ICO file as the app icon in VS's project properties dialog yields and icon that is obviously converted to 16 colors, and looks awful.
Extract 8 Bit Grayscale Image?
Oct 13, 2007I need to extract 8 bit grayscale image.
My plan is this:
1. input the picture to a picture box no 1
2. load into memory
3. extract all value to a 2D array matriks
4. process the picture
5. Show the result in picture box no 2
6. End
I met a serious problem when i want to load it to memory. For a faster process i use Graphics class (i've got this trick from my friend). but later I found out that graphics wont work for PixelFormat.Format8bppIndexed.
Here's the code:
Imports System.Drawing.Imaging
Imports System.Runtime.InteropServices.Marshal
Public Class LockImage
[Code].....
VS 2010 - Display Grayscale Image From Raw Data Using Palette
Jan 19, 2012Any code for creating the pallet for a Gray scale image, to display it on a picture box? I have written the code for creating for palette for a RGB image which is as follows:
Marshal.Copy(Image_bufffer, 0, _pImg, 1024 * 1024)
myBMP = New Bitmap(1024, 1024, 1024, System.Drawing.Imaging.PixelFormat.Format8bppIndexed, _pImg)
pal = myBMP.Palette
For i As Integer = 0 To pal.Entries.Length - 1
pal.Entries(i) = Color.FromArgb(255, i, i, i)
Next
myBMP.Palette = pal
Picturebox1.Image = myBMP 'Show the image
But the image displayed looks dull(less brightness) than the same image viewed from ImageJ. So instead of creating pallet from color.Argb, is there any way to create palette for a gray scale image?
Develop A Image Processsing Application That Will Analyse Some Grayscale Images?
Jan 14, 2012I am trying to develop a image processsing application that will analyse some grayscale images, the images in question are basically biological photographs(PCR GEL Photographs) that have some bands which are lighter in shades, and these bands are arranged in some pattern( Mostly linear), Till now, i had suceeded to programatically identify those bands which are distinct and clearly seperated from other band, but the band, which are close, could not be identified as seperate band.more over my algorithms fails miserably in case case of color photographs,and i am clueless for a better approach.
View 2 RepliesConvert A Black And White Image In JPEG Format To A Grayscale TIFF Format?
Jun 5, 2011Im 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.
View 2 Replies.net - Controlling Image Resolution When Converting A PNG Image Into A PDF Using ITextSharp?
Aug 10, 2010I have created a PNG image that is 200 DPI, and perfectly sized for a landscape A4 page size. I needed to convert this to a PDF document, so I've used the iTextSharp library with the code below.This all works, however the image quality has degraded.
Public Sub ConvertPNGtoPDF(ByVal inputFile As String, ByVal outputFile As String)
Using fs As New FileStream(outputFile, FileMode.Create, FileAccess.ReadWrite, FileShare.None)
Dim document As New Document(PageSize.A4.Rotate, 0, 0, 0, 0)
[code]....
Converting Color To And From Hex String?
Apr 18, 2009I'm trying to convert a chosen color into hex base 6 to save to a config file for later use, and that part works, but when converting back to integer to use for a color, it gives me an error about incorrect base.
Dim hex_color = System.Drawing.ColorTranslator.ToOle(ColorDialog1.Color).ToString("X6")
Dim color_int As Integer = Convert.ToInt32(hex_color, 6)
Panel1.BackColor = System.Drawing.ColorTranslator.FromOle(color_int)
Converting From A Color To A Brush
Mar 3, 2011How do I convert from system.drawing.color to system.drawing.brushes in vb.net? Meta question: What is/why the difference between a brush/color/pen?
View 5 RepliesSql - Conversion Failed When Converting The Varchar Value 'Blue Color' To Data Type Int
Jul 2, 2010I am trying to create stored procedure that gone return varchar value, and that value I need to display in textbox.This is the code for stored procedure:
Create PROCEDURE Status @id_doc int, @Name varchar(50) OUTPUT
AS
select @Name =items.name
from Doc,Items where @id_doc=IDN and doc.IDN=Items.ID
return @Name
This is the code in vb.net where i need to display returned value from procedure in textbox:
Public Sub Current()
Dim dtc As New Data.DataTable
Dim dr As SqlClient.SqlDataReader
[code]....
When I try to execute this code I get this message in exception:
"Conversion failed when converting the varchar value 'Blue color' to data type int."
Convert A Drawing.Bitmap To 4 Bit Grayscale?
Apr 17, 2011I 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?
View 3 RepliesMake Windows Form Grayscale?
Dec 18, 2009Lets say that I have a form called "frmMain". There is a button on there that will launch a Modal pop up form. Any idea on how I can make the frmMain go to a grayscale or disabled look when the modal form is shown? I'm trying to make it so the modal form "pops" a bit from the main form interface.
View 3 RepliesWhy Grayscale Bitmap Cannot Show In Picture Box
Jul 12, 2010I'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
VB 2008 - List Of Colors - To Change The Background Color Of The Combo Box To The Selected Color
Mar 3, 2010Alright inside of a combo box I have a list of colors and I want to change the background color of the combo box to the selected color...basically this... but im not sure what the problem is here anyone have some advice or is this not possible?
CBLinerColor.BackColor() = CBLinerColor.Items.Item(0)
Basically i want dynamic code that will change the color depending on the items in the box.
VS 2008 Background Of Form To Be The Same Color As The Window Frame Color That The User Selects
Jun 19, 2009I want the background of my form to be the same color as the window frame color that the user selects, even if that changes. I selected System->WindowFrame as my background color, but it always remains a dark grey, regardless of what I have my window color set to. How else would I achieve what I want? I assumed I was doing it the correct way. Do I actually need code that gets the system window color and then apply it?
View 4 RepliesC# - Converting A HtmlElement Into An Image?
Jul 10, 2009I'm using a WebBrowser control in VB.Net to load a website. At that point, the WebBrowser.Document.Images property returns a collection of HtmlElement that are considered images.
What I'm trying to do at this point, is take a particular HtmlElement that represents an image and turn it into a System.Drawing.Image so that I can manipulate it. But I can't figure out how.
I did try to search for an answer, but came up with nothing. 'WebBrowser', as it turns out, seems to be a really popular keyword.
EDIT: It's been suggested that I use the SRC attribute of the HtmlElement to download the image; but the image can be dynamic - meaning the image I download can be separate from the image on the website....so, that won't work for my purposes.
Converting A Webpage To Image With Code?
Mar 19, 2009Would it be possible to basically make a full web page appear in a windows form application as an image? Sort of like a print screen command, but just for the web page itself. I need this to show any web page in overview as a image in my program, but I have no idea how to go about this. I suppose it would be almost like a web browser; other then that you can't click links or interact with the page at all, as it is an image. Preferably without loading the web page then converting it, but having it as in image as you load any given page - not sure if it's possible with just VB. Even a rudimentary method would be much appreciated.Note: I'm not to great with VB, so if you don't mind, please provide as much detail as you can with any given code,
View 2 RepliesConverting BMP Filepath To An Image For A Picturebox?
Jul 7, 2011I'm Currently using the following code to open up a folder containing Text and Bitmap files only and store them in arrays.
Dim d As New System.IO.DirectoryInfo("C:Documents and Settings" & GetUserName() & "My DocumentsWolfRiderGamesWaterGameMaps")
Dim FileCount As Integer = d.GetFiles.GetUpperBound(0) + 1
[Code]....
What I need is an extra bit at the end that takes the first bitmap file found and puts it in a picturebox called "PicCenter".
I need to have this done through converting its filepath to the image itself.
I will also Need an explaination of how you did it (If its complicated) because i'll need to do it again later.
Im using Visual Studio 2010.
I Know how to do most simple things in VB which usually allows me to do a workaround for something like this, but this one I couldn't.
VS 2010 Converting An Image To Stream?
Jun 23, 2010How would I go about doing this? I plan to send the image over a network.
View 3 RepliesImage Converting - User Selection For Type
Feb 21, 2009I an working on image converting program. I need to convert a file that the user selects in an openfiledialog to the following file types in a folder that the user selects:
.ICO
.PNG
.JPEG
.BMP
.GIF
The user will select which type they want to convert the image to.
Get The Main Color From An Image?
Feb 18, 2011I have an image
[URL]
Here is my code
Dim PictureLoc As String
PictureLoc = list.SelectedItem 'list of picture paths
Me.BackgroundImage = Image.FromFile(PictureLoc)
Dim NewPic As New Bitmap(1, 2) 'Make a new image
[code]....
How To Change The Color Of A Image
May 17, 2010Ok lets say i have a image with a black back color and a circle that is white. How do you change the circles color in vb? Is there a code for it?
View 2 RepliesHow To Modify Image Color
Jul 14, 2011I am using VB2008. I have an image (black with transparent background). I would like to replace the black color of the image to another color (blue or red). Suggestions on how I could go about this will be very much welcome.
View 2 RepliesHow To Replace A Color In An Image
Feb 19, 2012I'm in search of a simple algorithm to replace a color in an image with a different one like in this one-> [url]. I'm using VB.NET. Can a "flood fill" algorithm be applied for this purpose?
View 1 RepliesRed Color Of One Image To The Alpha Value Of The Second?
Jun 30, 2009I am trying to create a function that would take 2 images. 1 of the images is a grayscale image and the other is a normal image. What i want to do is apply any of the R or G or B of the grayscale image (in grayscale image r=g=b so it makes no difference) to the Alpha of the second image. i DID succeed on it. However the code is EXTREMELY slow. It takes 1 second to perform it. And i have to perform the function atleast 30 times a second (it will be outputting to a Decklink card). Here is the code:
public function createOverlay(ByVal Main as Bitmap, ByVal Key as Bitmap) as Bitmap
For index as integer =0 To (Key.Width*Key.Height)-1
Dim crntX= index Mod(Key.Width)
[code].....
This function will have to run infinitley until the user presses stop and keep updating the output buffer. How can i make it faster? ( i need at least 30 executions per second)
Converting Byte Array To Image To Load Crystal Report ?
Apr 8, 2012i do not know why data type image on ms sql is not working ! so i choose to use varchar(max) as my datatype to store images.. but i do now know how to load it on crystal report..
View 1 Replies16 Color Bitmap Image And Interpert?
Apr 2, 2010I need to read a bitmap generated with paint or similar programs and interpert the picture to detect straight lines of black, larger squares in red and smaller squares of yellow, green or red. Which one of the Visual Basic environments are is best suited for this? WPF or Forms or..The lines represent walls and for start we have square objects as obsticles. I would like to create a maze and allow a dot to travel between obstacles leaving a trace of pixels and not hit any of the objects untill it exits.
I like to write the logic for it but I do not know how would I read a 500x500 pixel picture and decode the colors of each pixel. I like to assign a byte for each pixel's color (256color) but only use 4 bits of it to for start.
I am doing this as hobby. So please forgive me because I should only look at your answers during my free times.It will take some time before I could see it and mark your work as Helpful or Answer.
Change The Depth Of Color Of An Image Using .net?
Dec 7, 2009How can i change the depth of color of an image using vb.net?My Program's Options Are: Convert To: 1 Bit, 4 Bits, 8 Bits ,16 Bits?
View 1 RepliesDetecting Specific Color In Image
Sep 5, 2011Any way to run through an image and check to see if the image contains a red pixel.
View 3 Replies
