How do i determine the pixel width and pixel height of the largest image i can paint onto the graphics object of a printer while inside a printpage event?
Imports
System.Drawing
Class
[Code]......
I would like to load a GIF file, and start with the first pixel and check to see if that pixel color is closer to Black, Red, Green or Yellow, then take what ever color it closest matched to and output that color as a number, 0, 1, 2 or 3. So just for a small example a 5x4 GIF would be converted to something like this: 0112223322220111332?
View 13 RepliesIs there a quick way to check the color of a pixel on the screen?
View 2 RepliesI'm loading a picture into a picturebox. How can I set the pixel width to a fixed number, ex 300?
The whole picture must fit the picturebox, even if the original resolution is higher.
Dim bmp As New Bitmap("c:Test.bmp")
bmp.SetResolution(300, 50)
PictureBox2.Image = bmp
I am writing some text in a control using Graphics.DrawString I need to measure the width of the drawn text in pixel.
I tried to mesure it using:
Graphics.MesureString
TextRenderer.MesureText
GetTextExtentPoint32A (API)
All these method of mesuring the string returns different values for the width, and they are all the wrong value They all mesure the narrow caracteres as "i" as being narrower then they realy are and the wide caractere as "W" as wider than they realy are What would the proper way to draw and/or mesure a string to get the right position on the screen where the text ends
during the development of my project, i've fall in the need to change the position of some forms, pixel by pixel using a timer.Now, i've checked that the movement is very fluid when form is not very heavy, when it contains few elements, but when it has a lot of elements inside, the movement becames nervous and not fluid, the movement becomes jerky.
View 5 RepliesHow can I find out the pixel colour of a certain point on a web browser. For instance,WebBrowser1.getPixelColor(0,0) would get the rgb colour value of pixel 0, 0.It doesn't have to be rgb it might be hsl or whatever.The web browser is showing a local web page that is hosted on a network. If there is an error then the screen goes all grey. What I want to do is, if this does happen, display an alert message like - "An error has occurred
View 3 RepliesI have an empty picture box with the background colour set to the transparancy colour. How can i get the colour of the pixels within the transparant picture box so that i can create a bitmap of the transparant section of the form?
View 2 RepliesI am "weeks new" to visual basic 2008 but I was hoping that someone might tell me how I can open an image in whatever type of "visible" graphics window (always positioned at: x=0 y=0); move to some "definable position" of interest x=(n) y=(n); change the brightness of that "individual pixel" by some "definable means of measure" from its original state; and save the new image as a separate image file?
View 4 RepliesI want to count all of red pixel in an image. This is my code :
Dim x, y, kq As Integer
Dim image1 As Bitmap
image1 = Bitmap.FromFile("D:FiberAll.bmp")
[Code]....
Now I have inserted a picturebox and now I have to get the color value of a pixel of the image which I load to it.
View 5 RepliesI was wondering if their is a way to set my program to search for a certian image or a set of pixels on the screen every 5 seconds, and if the specific image is on the screen, click it.
View 3 RepliesI am trying to make everything in my image black that is not white. I am having a little trouble doing so though.
[Code]...
I drew an image in a picturebox with the image height as picturebox height and image width as picturebox width. The image is placed somewhere on the center of the picturebox. My intention is to scale the image to fit to the picturebox.
View 2 RepliesI am developing a software that would scan the image in a picturebox and obtain the rgb values of each pixel in the image and convert each rgb values to HSL values. I am using vb 2008 express edition. I am still a student. I am just starting to learn vb 2008. All I have done is to obtain the image in a file and paste it in the picturebox. Below is my code. I dont really know how to start with the process of obtaining the rgb values of each pixel and converting them to HSL values and averaging the HSL value.
Code to obtain image:
Option Strict Off
Option Explicit Off
Imports System.IO
Public Class Form1
Inherits System.Windows.Forms.Form
[Code] .....
I still do not know how to start with the process of obtaining the rgb value for each pixel.
I am working on a program that alters very large images. The images are usually in .tif or .bmp format. I load up the old image, copy a section of it into a new image, then save the new image. So far everything works my problem is that the images that i have to alter are 900mb+. Using the simple Bitmap class is not working because the images are quite apparently too large to fit into memory that way. (throwing an OutOfMemory exception)I want to step over the part of loading the image, and turn it into streaming the pixels from the image straight from the disk. I kind of have an idea of how to get the stream open and start reading, but I have no idea what to do with the 32bit integers that are being returned. how to stream pixel data from an image?
Dim oldImage As Bitmap
Try
oldImage = New Bitmap(file)
Catch ex As Exception
[code].....
I am trying to read a 16bit binary file (tif image) and pixel values of the image ranges from 1200 to 4500. I tried to use BinaryReader using ReadUInt16 but I get EndOfStreamException Unhandled error. ReadByte method works fine with an 8bit tif file. I do not know how to read a 16bit image file using binaryReader. Shouldn't I use ReadUInt16 since values of pixels range from 1200 to 4500?
[Code]....
I would like to create a pixel viwer (i.e. zoom into a picture to view the image's pixel information - Similar to windows paint or Photoshop). I have created an image zooming code, but it enlarges the image and sadly, doesn't show the blocks of pixels I was hoping for.I have thought of several ideas, but each worse than the next. As an example, re-create the image, increasing each pixel's area based on the zoom-level. But I can tell already that this process would be slow and judging by photoshop (or paint) there is a quicker method.
View 2 Replieshow to get color form a certain pixel from a bitmap image, but i cant find function getPixel in the picturebox object.
View 5 RepliesIn html I just do <img src="x.jpg" width="1px" height="2px"> how about in vb.net. Is there an easy way to do this. When you are viewing the image through the picture box
View 1 RepliesI save my images into my SQL Server Database with ASP.NET(2.0).
(imageData -> image) (imageType -> varchar) (imageLength -> bigint)
Thus the imageData will be "Binary data" and the imageType will be like "image/gif" and the imageLength will be like "6458".......
Is it possible to get the image HEIGHT and WIDTH from my VB.NET code inside my ASP.NET? I want to make my picture box on my web form the size of the actual image that is saved in my database.
I want to draw a rectangle on image where color pixel of image is black
View 1 RepliesI am making an application which is capable of displaying a picture, and making adjustments to it. Unfortunately i'm stuck at this phase:The colour of each pixel in the image should be inspected and stored in one or more arrays.
My code so far
Public Class Form1
Dim OpenFileDalog1 As New OpenFileDialog
[code]....
I know to get an image's size if its a file, but what if it is located in the clipboard? I really don't want to save it from the clipboard as a file only to read its size.
View 3 RepliesI want to get the width & height of the image file.. Mine code is currently getting the file size, I also want to get the width & height.How to get width & height,
[Code]...
I need to get the dimensions of an image on a server without downloading it.I thought I can request some header data or any kind of data that refer to the height and width of the image but can't find anything like that.
View 1 RepliesWe stream the BBC news channel through a laptop hooked to a PC in reception for our clients. Annoyingly the stream is interrupted randomly (the line isn't dropping, it's the BBC's problem). Therefore when it's interrupted we get an error screen appearing which we have to go and manually refresh to get the stream back playing.
My intentions are to build an app which will be run alongside (silently) the stream monitoring intermittently a range of pixels. If the range matches the error screen that I mentioned previously then I'd call "Esc" to exit the full screen and then "F5" to refresh the browser and finally a double click on a specified coordinate to bring it back to full screen.
Problem: I've been doing some googling and so far have only seen related posts where the comparison is between two saved images. Due to this I expect the answer to be "Take a screenshot every now and then, compare, return result".
I want to get the width & height of the image file..Mine code is currently getting the file size, I also want to get the width & height.How to get width & height.
Imports System.IO
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Try
[code]....
Ive been working on creating a side scroller game, and the back color of my pictureboxes needs to go. when transparent, it shows through the program and onto whatever is active in your Windows os(usually Visual studios).
I am trying to rip pixel color off of the background image picturebox( the level), and replace parts of the character picture box that show transparency with the level art. there may be poor logic in my code?
Heres my code:
Dim newImage As Bitmap = New Bitmap(PictureBox1.Image)
Dim backImage As Bitmap = New Bitmap(PictureBox2.Image)
Dim ximg As Bitmap = New Bitmap(PictureBox3.Image)
[code]....
not the best idea, but all i get is one color for all the level pixels placed in the new image, which is odd. any poor logic you see in this code that could allow the newImage.setPixel not to be 1 color? when i breakpoint, it is recieving different colors from the backimage.getpixel, but only putting one shade on for setpixel somehow. im not going for an accurate color read from the background yet, just wondering why im getting 1 pixel color for the whole picturebox background when being changed.
how I could search a given bitmap, say "test.bmp" or a printscreen, for two pixels that are next to each other and that have specified color values? The colors are: &H486596 and &H213D66. I then want to return the pixel positions in the image at which they are first located adjacent to one another. I'm only after the first instance of the occurrence. I wish to use GetDIBits as I hear that it's quicker. So I want to find the first instance where the color value for pixel (x,y) = &H486596 and (x+1, y) = &H213D66.
View 11 Replies