Comparing Image From File With Image From Screen
hey, i was wondering if it is possible to look for a special image on my computer screen. i guess it would be similar like the function that looks for a specific color on the screen. anyone know how to make 1 to look for a specific image on the screen? im guessing u can call it image comparison with a specific image from a file or whatever, to an image on the screen.
For example:
i take a screenshot of my screen right now, i crop it out so i only have the image "Members List", please remember, its an image, not text. then i want to have the function look for that exact same image on the screen and return a true or false.
ne help?
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Compare Image File With Selected Screen Area
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Image Comparing
hi,
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Image Comparing In Vb 6
how can i compare two images in vb6
i had put these code to compare but this is incorrect code to perform it
if image1.picture=image2.picture then
print "Picture match"
else
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Save Image From Clipboard To Resized New File Image
Hi,
I'm trying to make screen captures from Acrobat pages, to create thumbnails with.
I'm doing this by:
1. opening the PDDoc of Acrobat
2. Copy the first page to the clipboard
3. Putting the clipboard image in a Picture variable
4. Stretching it with StretchBlt to a new picture
5. Trying to save the new picture
With the code below, the resulting value for retstretch is 0, thus the stretching didn't work. I don't understand my error. The savepicture method results in nothing. I've found several examples of the StretchBlt method, but all with Pictureboxes. I want to do this without a Picturebox. Is this possible? If not, how can I integrate the pictureboxes in my example?
Thanks in advance! Any help is really appreciated.
Code:
Public Sub CreateThumbnail(strFileName As String, Xpixels As Long, Ypixels As Long)
'strFilename = PDF document
'Xpixels = pixel size width
Ypixels = pixel size height
Dim pdfDoc As Acrobat.AcroPDDoc
Dim pdfPage As Acrobat.AcroPDPage
Dim ret As Boolean
Dim pageCount As Long
Dim pdfRectTemp As Object
Dim pdfRect As Acrobat.AcroRect
Dim ClipBoardPic As Picture
Dim pdfPic As New StdPicture
Dim pdfPicWidth As Long
Dim pdfPicHeight As Long
Dim retstretch As Long
' Create the document (Can only create the AcroExch.PDDoc object using late-binding)
Set pdfDoc = CreateObject("AcroExch.PDDoc")
' Open the document
ret = pdfDoc.Open(strFileName)
If ret = False Then
MsgBox "File not found!", vbCritical, "Error"
Exit Sub
End If
' Get the number of pages
pageCount = pdfDoc.GetNumPages()
' Get the first page
Set pdfPage = pdfDoc.AcquirePage(0)
' Get the size of the page
' This is really strange bug/documentation problem
' The PDFRect you get back from GetSize has properties
' x and y, but the PDFRect you have to supply CopyToClipboard
' has left, right, top, bottom
'Set pdfRectTemp = CreateObject("AcroExch.Rect")
Set pdfRectTemp = pdfPage.GetSize
' Create PDFRect to hold dimensions of the page
Set pdfRect = CreateObject("AcroExch.Rect")
pdfRect.Left = 0
pdfRect.Right = pdfRectTemp.x
pdfRect.Top = 0
pdfRect.Bottom = pdfRectTemp.y
' Render to clipboard, scaled by 100 percent (ie. original size)
' Even though we want a smaller image, better for us to scale in VB
' than Acrobat as it would greek out small text
' see http://www.adobe.com/support/techdocs/1dd72.htm
Call pdfPage.CopyToClipboard(pdfRect, 0, 0, 100)
Set ClipBoardPic = Clipboard.GetData(vbCFBitmap)
pdfPicWidth = PixelsToHimetricX(Xpixels) 'Function to convert pixels in HiMetric. Code is not included here
pdfPicHeight = PixelsToHimetricX(Ypixels)
retstretch = StretchBlt(pdfPic.Handle, 0, 0, pdfPicWidth, pdfPicHeight, _
ClipBoardPic.Handle, 0, 0, ClipBoardPic.Width, ClipBoardPic.Height, vbSrcCopy)
SavePicture pdfPic, "c:Temp est.png"
End Sub
Save Image From Clipboard To Resized New File Image
Hi,
I'm trying to make screen captures from Acrobat pages, to create thumbnails with.
I'm doing this by:
1. opening the PDDoc of Acrobat
2. Copy the first page to the clipboard
3. Putting the clipboard image in a Picture variable
4. Stretching it with StretchBlt to a new picture
5. Trying to save the new picture
With the code below, the resulting value for retstretch is 0, thus the stretching didn't work. I don't understand my error. The savepicture method results in nothing. I've found several examples of the StretchBlt method, but all with Pictureboxes. I want to do this without a Picturebox. Is this possible? If not, how can I integrate the pictureboxes in my example?
Thanks in advance! Any help is really appreciated.
Code:Public Sub CreateThumbnail(strFileName As String, Xpixels As Long, Ypixels As Long)
'strFilename = PDF document
'Xpixels = pixel size width
Ypixels = pixel size height
Dim pdfDoc As Acrobat.AcroPDDoc
Dim pdfPage As Acrobat.AcroPDPage
Dim ret As Boolean
Dim pageCount As Long
Dim pdfRectTemp As Object
Dim pdfRect As Acrobat.AcroRect
Dim ClipBoardPic As Picture
Dim pdfPic As New StdPicture
Dim pdfPicWidth As Long
Dim pdfPicHeight As Long
Dim retstretch As Long
' Create the document (Can only create the AcroExch.PDDoc object using late-binding)
Set pdfDoc = CreateObject("AcroExch.PDDoc")
' Open the document
ret = pdfDoc.Open(strFileName)
If ret = False Then
MsgBox "File not found!", vbCritical, "Error"
Exit Sub
End If
' Get the number of pages
pageCount = pdfDoc.GetNumPages()
' Get the first page
Set pdfPage = pdfDoc.AcquirePage(0)
' Get the size of the page
' This is really strange bug/documentation problem
' The PDFRect you get back from GetSize has properties
' x and y, but the PDFRect you have to supply CopyToClipboard
' has left, right, top, bottom
'Set pdfRectTemp = CreateObject("AcroExch.Rect")
Set pdfRectTemp = pdfPage.GetSize
' Create PDFRect to hold dimensions of the page
Set pdfRect = CreateObject("AcroExch.Rect")
pdfRect.Left = 0
pdfRect.Right = pdfRectTemp.x
pdfRect.Top = 0
pdfRect.Bottom = pdfRectTemp.y
' Render to clipboard, scaled by 100 percent (ie. original size)
' Even though we want a smaller image, better for us to scale in VB
' than Acrobat as it would greek out small text
' see http://www.adobe.com/support/techdocs/1dd72.htm
Call pdfPage.CopyToClipboard(pdfRect, 0, 0, 100)
Set ClipBoardPic = Clipboard.GetData(vbCFBitmap)
pdfPicWidth = PixelsToHimetricX(Xpixels) 'Function to convert pixels in HiMetric. Code is not included here
pdfPicHeight = PixelsToHimetricX(Ypixels)
retstretch = StretchBlt(pdfPic.Handle, 0, 0, pdfPicWidth, pdfPicHeight, _
ClipBoardPic.Handle, 0, 0, ClipBoardPic.Width, ClipBoardPic.Height, vbSrcCopy)
SavePicture pdfPic, "c:Temp est.png"
End Sub
Edited by - DoLoop on 5/30/2008 6:07:25 AM
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' reading from a image file and storing the data into a variable. fso is a file system control and objFile is file control
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Wend
Objfile.Close
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Objfile.Put (fileContent)
Objfile.Close
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thanks,
sunil
Can't Get Image Admin, Image Edit, Image Scan To Work
Hi Guys,
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Loading Image Into Image File
hey everyone,
i have a bit of an issue regarding some coding I am trying to do. Let me paste in here what needs to be done and if anyone can help that would be greatly appreciated.
Thanks
"In the click event of the second button, allow the user to select an image, then load that image into the image control, and also add the file name (not the full path, just the file name) to the listbox. So,
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<EDIT>
Oh, and by the way, I forgot to mention that the image needs to stay on top of any other application that may be running.
</EDIT>
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Code:
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In my VB application I need to display full screen images, one at the time. Only image should be visible, nothing else.
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Thanks in advance.
Sasha
Please reply to shkolns@attbi.com
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Hi there,
I have been trying to put an image on the screen using BitBlt, and it worked fine. Then, I tried to do the same thing, but without a picturebox. I used the LoadImage Win32 API function to accomplish this, and, again, it worked fine. But, as far as I know, this function only works for BMP files, but I want to put JPG's on the screen. I tried to put the JPG file on the screen with LoadImage, but it didn't work. Is there some other way to open JPG files in a DC (Not using a Picturebox) and put them on the screen using BitBlt (Or maybe some other function of which I haven't heard)? Thankies.
Smooth Image Movement Accross Screen.
How do i get an image to move smoothly accross the creen wehn a button is clicked? I will prob need to get about 3 going across eventually.
I have previously used timers but didn't like um much.
I have also tried to bodge together a loop, it worked but it was a bit long winded, dont think it was the best way to do it, i was just guessing really. I am new to loops
I have seen someone use a combination of timers and loops (loop inside a timer), it worked pretty well i think.
So any ideas?
Splash Screen And Image Control Problem
I have a VB6 form that starts up in middle of screen. The scale mode is "1
twip" and the scale height is 4965 and scale width is 6510. The height of
the form is 4965 and the width is 6510.
I also have an image control overlaying the entire form. It's height is 4965
and width is 6510.
The bmp image that is within the image control is 434 pixels wide and 331 pixels high. Displaying properties on this image via Explorer shows it is using 71 DPI for width/height.
The image displays fine on my PC and any PC that is using a 96 DPI size
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On some laptops with wide screens, it would appear that Dell sets the font
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without having to adjust or stretch my image?
Any sample code or explanations would be appreciated.
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Thanks.
GetDIBits, BitBlt? Finding An Image On The Screen.
Hi,
I'm trying to search the screen for a set bmp, basically I want to scan the screen until it finds a certain image, then return the coordinates of the image. I'm just not sure what the most appropriate or effective way of doing this is.
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Resetting Image Position When It Reaches End Of The Screen?
I was wondering how I would reset the images position to 0 when it reaches the edge of the screen. I tried this:
VB Code:
If bomb_yellow.Left = 3480 Thenbomb_yellow.Left = 0End If
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Thanks!
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