Hauppauge WinTV-USB FM manual Image Save, Print and Copy to Clipboard

WinTV-USBInstallation and Reference Manual

Image Save, Print and Copy to Clipboard

The process to save, print or copy an image starts with the digitizing of a single video frame. When one of these functions are clicked on, the next video frame is moved into your PC’s main system memory instead of the VGA display. Your PC’s processor then converts the digitized video image into a 24-bit DIB image (a format which is used internally in Windows), and then copied back into the VGA memory so that you can see the image which will be printed or saved. This becomes a “frozen” image in the window.

The video images which are digitized can be saved to disk, printed to a color or black/white printer or copied to the clipboard. These functions can be viewed from the File menu:

There are a few things which need to be noted. First, because a video frame is composed of two “fields”, an odd field with the odd lines in the image and an even field composed of the even lines, there might be a distortion in the frozen image if there was rapid motion while the image was being moved into main system memo- ry. This distortion is called “interlaced artifact”.

Another item to note is that the video image, when converted into a 24-bit DIB image, will look lighter than it did when it was in motion. You can adjust the image’s brightness, contrast and color saturation and hue by clicking on Configure/Color. These adjustments are made during the digitizing process on the board and will affect both the “live” image and the frozen image.

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