Adjusting Image Quality With WIA In VB 2005?
Jan 10, 2009
I've developed an application that acquires images from my Logitech QuickCam Pro 9000 using WIA. The problem is that I cannot figure out how to adjust the quality of the image taken by the camera. The camera has a 2MP lense, but the program will only acquire a picture of 320x240 pixels, which is the lowest resolution the camera has. How do I tell the camera to take a picture at one of it's other resolutions? IE: 640x480, 960x720, 1.3MP, or 2MP?
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Mar 13, 2011
I have a form which contains an Image control. What I am trying to do is find a way to adjust an image according to the size of the control and have the image look normal no matter how I adjust the Image control. I want the actual image to fill the Image control completely and not loose any integrity.
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Dec 28, 2010
'm working on an Image Encrypting software which reads out all the pixels of an image and then relocating the pixels in some way.
My Code is as below
Dim Img As New Bitmap(tbEpath.Text)
Dim ImgSize As Integer = Img.Width * Img.Height
Dim Pixels(Img.Width, Img.Height) As Color
[code]....
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Apr 24, 2012
I've been investigating and experimenting with the code snippet on this page: [URL] - with some rather undesirable and wacky results being produced.
Why do I need this? I am attempting to adapt this snippet to suit my needs for a day/night system in the game I am working on. I am sure that the correct results can be produced with this snippet, but at the very least I need some guidance as to how I can achieve what I want.
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Jan 8, 2012
Im attempting to make this tank fire a "bullet" or bullets. It fires them just fine bu leaves a trail behind and I need it to refresh and remove previous images so its a smooth action. I thought this code below was going to work but its not.
Class:
Public Class Bullet
Dim image As Image = My.Resources.Bullet_1
[code].....
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Oct 3, 2011
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...
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May 4, 2012
I'm trying to pass an image showing to the user a countdown. For this, I'm using a separate thread where I'm checking when the countdown timer should be started, and when so, I draw an image for every 6 seconds passed.
What's annoying is when I pass the drawn image to the UI, the quality of the image is changed and it looks bad to the user.
This is my little script that handles the drawings:
Try
remainingTime = (#12:04:00 AM# - (DateTime.Now - local_DateTimeclick)).ToString("HH:mm:ss")
remainingTimeInSeconds = Convert.ToDateTime(remainingTime).Minute * 60 +
[Code]....
Also tried with changing the properties of g, but there was no positive effect.
what can i do to make this properly work without changing the quality of the returned image?
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Nov 17, 2009
I got this code from this forum, it works perfectly but I have a problem where when you resize the images, the quality of the image becomes not as good, is there a way to keep it in the same quality as it is when resizing?[code]....
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Sep 16, 2010
I had this question before "Resize image on the fly make the image lose quality online but locally works nice".And what i got now is that it's not a problem of local or online, i ran this resize on the server itself "dedicated server", and i got the same bad quality image, so the problem is in the IIS configurations.What in iis can make this bad quality image happen?
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Mar 1, 2010
I'm using below code 2 add image into a picturebox during the run time. i could add image but when i clicked the picture to make it become smaller, the picture quality is blur which not as the initial picture.
[Code]...
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Mar 26, 2010
I'm using iTextSharp to print a PDF document. Everything goes ok until I have to print the company logo in it. First I noticed that the logo had poor quality, but after testing with several images, I realize that was the iTextSharp rendering it poorly.The test I did to say this was to print the PDF using my code and then edit the document with Acrobat 8.0 and I drew an image. Then printed the two documents and saw the noticeable difference.My question is that if anyone know if this can be due to a scaling problem where I'm failing to tell iTextSharp how it must render the image or is an iTextSharp limitation.
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Oct 30, 2009
I have a routine that creates a report which includes text and graphics. When I print to a PDF or printer the output looks great. When I draw the report on an image to save as a PNG, GIF, JPEG, etc. it does not look as good and I understand that is related to the 96 dpi native resolution. However, I made some modifications, and even though the graphics part of the image looks better, the text does not look as good as the PDF. I am creating the image using 300 dpi and text rendering is set at the highest quality.
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Mar 19, 2010
The Vb.Net application creates a bitmap from scratch and either converts to a tiff or sends it to a printer. In both cases, the quality of the image (in this case the font) is not good at all. The sample code listed below creates the graphics object that I use to write to the image.
Dim gr2 As Graphics = Graphics.FromImage(New Bitmap(800, 1000), Imaging.PixelFormat.Format32bppPArgb))
[code]......
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Oct 20, 2009
How do I control the video quality on flash using with the trackbar?
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Jun 23, 2010
I have an owner-drawn control where performance is an issue during quick repaints such as object drags, resizing and painting the selector square. i have noticed that several other apps, including Picasa, will temporarily draw a reduced-quality image during fast repaint scenarios and then update the image with a higher-quality version when the UI "settles down."
How should I (can I?) produce a lower-quality image to paint when many quick redraws are taking place? Are there other strategies similar to this i can employ to increase performance (or fake increased performance.) [code]...
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Jul 3, 2010
I've been searching for hours tonight searching existing posts, other websites and all i can find are examples of how to capture a image from a webcam.Does anyone have any code that simple talks to the camera device via WIA, and then saves every image found on the device to a hard drive?I found this code below. Credit i cant tell you as i have a bunch of different flavors of code, but this only saves the file as a tmp file, and not the actual image file i expected after selecting?
Imports System.Drawing
Imports System.Runtime.InteropServices
Imports WIALib
[code].....
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Jul 8, 2010
i have made 3 projects in vb.net.for all those three projects i have used this code
Me.WindowState = FormWindowState.Maximized
my laptop resolution is 1366x768.for my resolution i'm getting the desired output but for any other resolution i'm finding the objects being misplaced.
is there any way by which i can make my forms adjust for any particular resolution.
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Dec 23, 2011
I'm having trouble adjusting the font style in a RichTextBox and I've seen a few different approaches that talk about single attributes (like toggling bold on and off)... but I'm trying to make it so that my font class can adjust any attribute (bold, italic, underline).
I realize that Font.Style is a set of Boolean flags (a bitfield?)... but I'm not sure how to handle the attributes all at once.
Here is the troublesome code:
Public Sub ModifyFontStyle(Optional ByVal Plain As Object = Nothing, Optional ByVal Bold As Object = Nothing, _
Optional ByVal Italics As Object = Nothing, Optional ByVal Underlined As Object = Nothing)
[Code]....
What is happening to the font? The text should be underlined and in italics not strikethrough...
Is this a logic error or a simple misunderstanding on my part?
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May 23, 2011
How do I change the Windows Speaker Volume (The Main Output Volume Control Volume Value) via VB.NET? I want a way to like indirectly change the whole system's volume like we do it from the Volume Control application on Windows 7
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Dec 9, 2010
It seems there is no easy solution for adjusting a specific format of a used font e.g. for Text. As I understood in order to change any part of the used format we need to use New Font(...) form of implementation which looks a bit odd to me.
TextBox1.Font.Bold = True
which needs to be rewritten as:
TextBox1.Font = New Font(TextBox1.Font, FontStyle.Bold)
which is no reason that I can see why it should be hard like that.Anyway, here is my solution for adjusting the font style using four CheckBox controls (i.e. BBold, BUnderline, BItalic and BStrikeout).Preview is a TextBox control.
Private Sub SetFontStyle(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BBold.CheckedChanged, _
BUnderline.CheckedChanged, _
BItalic.CheckedChanged, [code]......
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Nov 25, 2010
I've a form set to size 1240:750. On my PC where I've VB2010 installed, the screen size is set to 1680:1024 and the form can be viewed fine but on a PC with screen size set to 1280:1024 (higher than the form) the form in question is cropped almost a third of it. To adjust the form to everyone screen size I set the below code at load with no avail.
'Autosize form to screen
Me.Height = (SystemInformation.PrimaryMonitorSize.Height) * (0.9)
Me.Width = (SystemInformation.PrimaryMonitorSize.Width) '* (0.9)
Me.MaximumSize = New System.Drawing.Size(Me.Width, Me.Height)
Me.MinimumSize = New System.Drawing.Size(1240, 750)
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Oct 29, 2009
I have a windows form which contains a group of panels in a flowlayout control. Each panel has a button acrossthe top which is always visible and clicking on it expands the panel to view the other controls on it. clicking on it again shrinks the panel back to the size of the button. A simple form of menu. The flowlayout control has autoscroll enabled and as enough panels are resized (opened) they obviously are too big for the form and a scroll bar pops up.To get the most recently opened panel in the viewable area I use
FlowLayout.ScrollControlIntoView(pnECBF)
where pnECBF is the panel just resized. This works but places the panel at the bottom of the form i.e just in the visible area. I want the user to be able to see the panel AND the next menu button which is on the subsequent panel. So basically what I want is the panel into the visible area +25 pixels for the next panels menu button.
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Dec 24, 2011
I'm trying to make a string inputted on a separate form's text box adjust the value of a string on another form. Is there a way to do this rather than exporting the data to a file and retrieving it on the other form?
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Mar 4, 2012
I have been trying to write a third-party status console for one of the applications I work with. I am unaccustomed to using pinvoke commands, but found some tutorials and attempted to use ReadProcessMemory from kernel32.dll:
<DllImportAttribute("kernel32.dll", EntryPoint:="ReadProcessMemory", SetLastError:=True)> _
Private Shared Function ReadProcessMemory(<InAttribute()> ByVal hProcess As
[Code]....
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Jun 17, 2009
Does anyone has a sample code or idea for cutting and adjusting a picture size when it is uploaded thru picturebox?
For example..
1. Picturebox size on winform = 150*150
2. A picture size = 1024 *800
3. I want to be able to cut 150*150 out of 1024 *800 and upload it. I wish the cutting and adjusting size is possible thru winform.
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May 7, 2010
I have a VB.NET (VS2010) Class Library project containing a control. It's exposed as a COM/ActiveX component so it can be embedded within HTML/Internet Explorer.
[Code]...
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Mar 24, 2008
I am trying to design a report where one filed can be multiple lines and the other related field should be located below (See attached)
address may be 1 one or more lines, city state zip should be located just below.
I already have the field set to can grow, however the spacing is the issue. How do I make the spacing adjust at runtime depending on the number of lines in the field. I can space it to say 3 lines, but if the address filed is only 1 line it leaves a 3 line gap.
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Nov 24, 2009
Once I read the property for DataGridView Column which allows Grid Column to adjust as per the data width. I can not recall it or find it.
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Sep 16, 2011
We have developed an application using Vb.net . Is there a way by which we can connect to HP Quality center.We have credentials for HP Quality Center, is there a way by which we can connect to it and access fields
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Jul 19, 2009
I need to know the best way to print a form in Visual Basic 2008. I have tried to print it using the printform method but the quality of the text is really bad. Are there other ways to print forms that dont involve the printform method and have great quality? I need to print the form the way it looks on the screen(which consists of textboxes,lines,labels).
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