Phytec eGrabber-4plus, Руководство по оборудованию

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eGrabber-4plus
118 
PHYTEC Meßtechnik GmbH 2004 L-608e_4
The routine Set_Image () defines the size, the position and scaling of
the image sections delivered by the Grabber separately for odd and
even images. In addition, the data format in which the picture will be
stored later in the memory, will be defined, and the address of this
memory region is determined.
Be aware that this function has different parameters in the DOS
version of the driver (see below).
Caution:
Calling the function can only occur when the Grabber is in Stop mode.
Set_Image cannot be called when the Grabber is still in the
digitization process, or when a Single-Shot digitization is not
terminated by the Stop_Grabber function.
The settings for both fields can be established separately and the
parameters have a letter prefix ‘E’ = even image or an ‘O’ = odd
image. Parameter without those letters are valid for both fields.
For both fields different sizes can be stated. They might be stored in
different memory regions and can be processed in different ways.
In Interlaced-Mode, both fields are interlaced and are stored in a
common memory region and have a maximum resolution of 720 x 576
pixels (PAL) or 640 x 480 pixels (NTSC), respectively. (See also the
section
Ø 
De-/Activating the Interlace Mode)
In the following we consider the setting of the parameters without the
field specifications (for example hsize for nEhsize / nOhsize). You
have correspondingly to precede the letter ‘E’ for ‘Even’ or ‘O’ for
‘Odd’. If a specific field is required, it will be indicated as such.
By specifying the parameters, a window with the size of the image is
set (in pixels) first. This is achieved by the parameter hsize and vsize.
Hsize indicates the number of pixels of the recorded image in
x-direction, and vsize the number of pixels in y-direction.