Table of Contents
Advertisement
40 Chapter 4: Hardware reference
Image formatter
Overlay
The overlay processor can overlay information onto grabbed images. The overlay
operation can be done before the image is sent to the Host. The overlay processor
can block part of the source image, or blend information with the image (with a
programmable alpha factor), using the MIL-Lite MbufTransfer() function.
Transfer controller and formatter
The transfer controller and formatter is capable of formatting and performing
high-speed transfers of data to Host memory. The transfer controller and formatter
also allows data to be transferred from the Host to acquisition memory.
Before transferring data off-board, the transfer controller and formatter can format
the data with its image formatter. The image formatter can perform several
operations on data transferred off-board:
• Image resizing. Captured data can be cropped (ROI capture) or it can be arbitrarily
downscaled to 1/16th of a field or frame. This can be useful to implement custom
software-based motion detection because at a reduced scale, image comparison is
faster.
• Vertical/horizontal flipping. Captured data can be flipped vertically or
horizontally, or both.
• Color space conversion. Captured data can be converted into the following
formats with square pixels: RGB planar, BGR32 packed, YCbCr, and 8-bit
monochrome. Alternatively, YUV16 packed (stored in YUYV format) can be
passed through. The image formatter can also perform color kill, which converts
the data to grayscale and then converts it to the appropriate destination format.
Advertisement
Table of Contents
