Save/change Pixels Of An Image?
Oct 14, 2009I have an Image object. I'd like to save that image on my hard disk, using a specific resolution. As a default, the image is saved in 640X480.
View 2 RepliesI have an Image object. I'd like to save that image on my hard disk, using a specific resolution. As a default, the image is saved in 640X480.
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'm trying to make a -what i thought would be simple app.My intention was to build program that:1) i'd provide a grayscale image2) the program would count the black pixels the grey pixels the more grey pixels etc. (the hue) and the white3) would make the percentage sum of all pixels, that is: 300.000 black pixels (rgb 0 0 0) etc. given that 0 is the black, 100 the white. e.g a simple grayscale image is 55.2 white
This was my way and i don't think that is useful:
First of a button to convert the image to greyscale:
Dim bm as new Bitmap(source.Width,source.Height)
Dim x
Dim y
[CODE]...
Secondly, -and that's the stupid way- i did -or better i wanted to do- this: i put the code to dynamically create labels, each label having the colour of a pixel as background colour and as text the colour converted to rgb
The third step which i intended to do (i couldn't get pas two) was to sum up the labels etc.
How can we get the pixels of an image in a fast way?
View 1 Replieshow can i get a full code or full information how to work with image and pixels i want to work with image by pixels as integer number not as color?
View 5 RepliesI am looking to remove groups of pixels that are less than 10x10 in size. The pixels are generated from scanned fax reports and are solid black, so they should be able to weed out easily. Our fax machine is rather old, and it generates random block dots along our documents. In other words, I have several images with random solid black dots that need to be removed.
View 4 Replieswhat would be the fastest (best) way to make transparent all pixels in one image that are white on other image?
Let's say that have 2 transparent images (.png) and want to delete some portion of the first image. Pixels to be deleted (made transparent) are defined as white on the other image (some kind of deleting mask).
I need to map the location of all the back pixels in an image into some kind of structure. The program later uses the structure to select a random pixel location. It then removes the location, to prevent it being used again. The problem is, there is a huge number of black pixels (close to 40,000) so an ordinary array takes forever to search for and eliminate the "used" pixels. Is there some other "Faster" data structure?
View 3 RepliesI come straight to the point without going too far. I need to scan all the pixels of a generic image and for each pixel derive the RGB components. I started with the following function that performs its task very good and returns 3 array (R, G, B) with the different values, but unfortunately is too slow.
[Code]...
I'm using Visual Basic 2006 and i'm a newbie so excuse me if my question is not complete. I basically have a picturebox, in which i am displaying an image from a webcam. Now the user clicks on two points on the image and i need to get the distance between the two points in terms of the number of pixels. I did think of and try the pythagorean theorem, but i'm confused as to what units the answer turns out in. Is it in terms of inches? or pixels? Do i need to set the Scale Mode propety to pixels to get it in pixels? And if so, is there a way to get the number of pixels per inch? Sorry for asking so many questions but i've been reading other forums and i'm confused!
View 12 RepliesOn forms size and such, is it in points or pixels? I'd assume pixels, however, it seems when i make a image that is in the same size, (i put the size as the dimensions for pixels), the image seems not the same size. I'm unsure of how big a "point" is, but i am aware of a pixel.
View 7 RepliesI want to replace every black pixel in "file.bmp" with transparent pixel
Dim b As Bitmap = New Bitmap(64, 64)
b = image.fromfile("c:/file.bmp")
For y = 0 To 63
[Code].....
How can I replace black pixels with transparent pixels?
How can I evaluate pixels within a Binary Image?What I have done so far is to take the image and use it's "getPixel" method and do a comparison of this pixel to black/white. But that can't be right... Can it? It's a binary image, I should be evaluating each pixel as true/false. Correct?
View 6 RepliesI'd like to check for all colors in an image. I've already came up with this:
Code:
Dim lst As New List(Of Color)
Dim img As Bitmap = System.Drawing.Bitmap.FromFile("C:image.jpg")
For x = 0 To img.Width - 1
[code]....
Unfortunately this needs to sweep through all the pixels, and it's EXTREMELY slow... method to get all colors in an image without sweeping through all pixels?
I want to programatically delete some pixels that are unused in order to reduce the image size.Can anyone tell me how to reduce the size of an image file without changing the pixels values..
View 1 Repliesi want to create image with width and height 64 and set all pixels to black
dim b as bitmap
b.width = 64
b.height = 64
[code]....
the code not working
How to save image from webbrowser loaded page to hdd (after loading save to hdd)?
View 2 Repliesi want to save image in ms access 2000 database & i want retrive it in a crystal report in vb.net 2005
View 8 RepliesI hoping to find a current and simple way to do this. I'm using VWD Express 2008 and SQL Express 2008.I'm able to get the client's path to the image file using an asp:FileUpload control on the web form.
How do I upload the client's image file and display it in the web form's image control?How do I save it to the sqlserver? The image table is already set up with a "Image" data type column. Can the image be saved to the database as simply as other data types?
I try to add text strings to an image but keep the metadata of the original image. The problem is How can I save ImgMetaData (from the original image) to the new image?
Here are the codes:
Public ImgMetaData As BitmapMetadata
Public myImageCodecInfo As ImageCodecInfo
Public myEncoder As Encoder
[Code]....
i made a vitual dekstop and i have a few problems that to be fixed. The first problem i have is that i have a picturebox as the entire form like the desktop background but the progrblem is that i have some group boxes over that picturebox box. How can i make so you can see throw the group box so that you can see the image behind it. And how can i save a picturebox image without a save file dialog
View 5 Repliesfind a current and simple way to do this. I'm using VWD Express 2008 and SQL Express 2008.I'm able to get the client's path to the image file using an asp:FileUpload control on the web form.How do I upload the client's image file and display it in the web form's image control?How do I save it to the sqlserver? The image table is already set up with a "Image" data type column. Can the image be saved to the database as simply as other data types?
View 3 RepliesI have two combobox in a form: Cb1 and Cb2
When I load the form, Cb1 and Cb2 are connected to a bindingsource.
When I change Cb1, the code (below) changes Cb2 to show only the items according to Cb1
This is working fine.
The problem is when I change Cb1 , change Cb2 and click the save button..... Cb2 seems to be 'lost'...
I'm using VS2008.
CODE:
I'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]...
Using VB.net 2010, Windows 7, and SQL Server Express 2008 R2.
I am trying to save an image from a picture box to an image field in SQL Server. The line of code below produces an error. What am I doing wrong?
...code
objCommand.Parameters.AddWithValue("@ss_no", mskSS_No.Text)
objCommand.Parameters.AddWithValue("@d_code", txtD_Code.Text)
[Code]....
I am trying to edit an image. I can open the image with Picturebox1.load(mypicture)
I can change the pixels/edit the picture by Dim img as new bitmap(picturebox1.image)
[Code]...
now here is the weird part. When I save the image the filesize INCREASES..but the picture dimensions are the same Example... TEST.PNG 1.3KB, when opened up via picturebox/saved the image is now 2.3KB
not sure why...i even though I specify system.drawing.imaging.imageformat.PNG
samething with JPG... it actually SHRINKS it evenmore.. example 88KB jpeg.. saved as jpeg is now 47.7KB...
How do you change the cursor image to an image from the project resources?
The methods I have found either don't work or only change the image within the form, and reverts back to default when the mouse leaves the window.
means the images that will display in the picturebox is based on the value shown on the textbox (ProjID)..
Please see code below..
[CODE
Public Class Form4
[code].....
I am using two button in WPF i want to change their image ie image button on DIsable how to do it.
View 2 Repliesi have a problem with the Size in VB.Net I think the Control Size in VB.Net Is Pixels so I want to enter this size cm/inch
I want To Convert Pixels to cm/inch or cm/inch to Pixels