I want to make an application that will have you webcam running and it will detect how bright the room is then set the screen brightness accordingly - I need both the screen adjust and webcam part.
View 3 RepliesIs it possible to adjust monitor screen brightness [usually do via [fn]+F7/F8] via VB.NET?
View 9 Repliescan somebody tell me the codes that a webcam can detect a human.
View 4 RepliesHow can I programmatically detect whether a webcam device is plugged in to the PC or not, return 'True' or 'False.
View 1 RepliesI am new in VB.NET. I want to use VB.NET to develop a program that will use a webcam to detect motion and trigger an alarm form PC.
View 9 RepliesI' am Use Notebook (Samsung R580) OS : Windows 7 Home Basic Sceen ..
As shown in the image the camera is black, but somehow the image Get Connected Profile is not .. There follows a look at the program's source code and would be happy if you tell me where the error
I have develop VB 2008 that can preview the image through 2 webcams. However, when i run my VB and select to preview through my USB webcam, it display dark screen. But i select to preview through my built in webcam, it works.So, can anyone can the code attached for me?For your information, the USB webcam can function properly using other video/image software.
VB version: VB 2008
OS: Windows Vista
Webcam brand: LifeTec
Is there a way to detect screen capture or recording is processing.
Atleast a way to know the process behind screen capturing?
i guess something has to be done with Kernal side of the system but not sure.
How to create a program that detects the screen resolution and change it to 1280x800 or 1024x768? What are the computer requirements to support each of these resolutions. (I don't want for the program to request the user as programs do this especially in Windows Vista, because my program will be created for Windows Vista).
View 8 Repliesfor example:
im viewing a web page, and it changed to blue...(bg color was white)
is it possible for vb to monitor this?
How to make program to detect mouse click and run vb script for action?
View 4 RepliesI recently bought this multi-touch monitor (writing on it right now :P), and am creating an application for it. Now I need to detect which screens are touch-enabled. For example, I have the touch screen as my main monitor now, but I also have a secondary regular screen, I need the aplication to be able to detect which monitor has a touch screen, EVEN WHEN THE TOUCH SCREEN IS THE SECONDAY NONITOR!
View 4 RepliesI am planning on creating a service that measures the bootup time for a computer. It would go something like this:
1. Service starts and waits for CTRL+ALT+DEL screen
2. Timer starts when logon screen appears
3. User logs in and timer stops
4. Service waits for process X to start
5. Process X starts and service gets System.Environment.TickCount
6. Service subtracts step 3 ticks from tickcount
The reason for the logon screen timer is I don't want to measure if the user booted up and went for coffee or something and shows up 20 mins later to log in. Is there any way for the service to detect when the logon screen is present and when it's gone?
I have a logitech webcam that I use to take pictures of customers to submit to a server/database. Utilizing AVICAP32.DLL calls, I was able to modify my VB.NET program to take these pictures via a button in my program.
My question is, it would me more convenient to my intended users to click the webcam button, instead of clicking on the button in my program.
Is this possible to do in VB.NET? and how can I do this?
If this is not possible to do with my logitech webcam than is there a Microsoft Webcam that can do this?
I'm trying to figure out some simple code to detect when a pixel changes color anywhere on the screen. Maybe with just a msgbox popup when it changes.
View 2 RepliesI am fairly new to visual basic and have written this program to detect a change in a selected pixel on the screen. When the pixel changes, a sound plays every x seconds. It works fine but after a few hours of operation a possible memory leak causes it to either crash the program or the PC. I have watched the process and I can see 4k added to it every 4 seconds or so. Where this memory leak is coming from?
Here is the code:
Public Class Main
Public pointx As Long
Public pointy As Long
Public areaselected As Integer
Public TimeToPause, SecondTimer, changefound As Integer
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.
I'm making a simple image editor in VB.NET, and one of the functions is brightness/ exposure.this is how I'm doing it:
For i = 0 To img.Width - 1
For j = 0 To img.Height - 1
Dim s As Color = img.GetPixel(i, j)
[code]....
where 2 is brightness which makes it twice as bright.Only problem is this doesnt seem to work well because it does it, but takes about 30 seconds!
I am now building a project where I need to regulate the monitor brightness from software using vbnet.I have now put 2 buttons (+ and -) but I cannot adjust brightess monitor from code usinf these buttons!=!=!=!
View 8 RepliesHow I can change an external image (of your choice from files)'s brightness levels. Such as making the image 200% brighter and then saving it as the original image.
View 1 RepliesI'm looking for a way to adjust the monitor's temperature. There's a program called f.lux that does this, but it doesn't get dark enough. The program I'm writing will be used on a boat and needs to be dark enough so that it's not blinding while driving at night.
View 14 RepliesI have developed a small utility that can change the PC's brightness through the use fo a slider. I have achieved this with the SetDeviceGammaRamp API and the RAMP structure.As it is, it works. I am attaching the code here as well, so that you can see it works.Now, the problem is : At Form Load I am getting the current brightness settings for the monitor :
Private Sub SetBrightness_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
GetDeviceGammaRamp(Me.Handle, Ramp1(0, 0))
[code].....
I'm using a series of 3 images within a picture box to create the illusion of a button being depressed when clicked. This is the code I use: Code
And this is the problem I have when doing these events: I am using Image lists, .png format, and I have made sure that they are all the same brightness in photoshop i.e. it is Vb that changes the brightness.
Know how to use the track bar to control the brightness or darkness of an image in a picture box,use track bar to sharpen an image and to use trackbar to emboss an image.
View 6 RepliesBTW this issue occurs in any MS office program when the VB.Net (or even VBA) is processing information.Example: In Excel, a worksheet is displayed on the screen. I start either, a VB.Net or VBA procedure and within 30 seconds the Excel worksheet (previously displayed) blanks out. In both VB.Net and VBA,ScreenUpdating = False. My expectation is that the previously displayed screen would stay static as if I left my desk to get a cup of coffee; came back and the same ole Excel worksheet was still there?Of course, setting VBA Screen Updating = False accomplishes two goals: 1) speeds up processing and 2) saves the user from seeing unnecessary "garbage-processing" steps.Why does VBA or VB.Net ScreenUpdating = False not freeze the screen at the time of its invoking?
View 11 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 RepliesCurrently I have the following VB.NET code to make a screenshot of my desktop, but it only takes a picture of the active screen:
Public Function SaveScreen(ByVal theFile As String) As Boolean
Try
SendKeys.Send("%{PRTSC}")[code].....
The following code is how I execute the above function, if it makes any difference, which I don't think it does:
SaveScreen("C:Lexer_tracescreen.png")
Now, I need to be able to take a picture of the entire screen, not just the focused window.
Now I'm creating at app in VB (Microsoft's, Visual Basic 2010) which will be in full screen but I want to know if I can put all my content in the centre of the screen. At the moment it's at the far top, left of the screen. When the screen size varies I want it will stay in the middle for all shapes and sizes. Like :
<div style="margin: 0 auto; width: 500px;"></div>
But this is for web pages using HTML and CSS.
I'm trying to get coordinates on my screen by holding down my mouse and placing it over different parts of the screen. I'm using the mouse_up and down events in a button to kinda simulate the mouse being held down. The problem I'm running into is that anytime I go past the button's bounds, the coordinates I want stop. This is what I have so far:
[Code]...
Sometimes when updating the entire screen or moving around controls etc, there is some fairly bad screen flickering.
View 2 Replies