Altera Cyclone II FPGA Starter User Manual
Page 38
4–16
Altera Corporation
Cyclone II FPGA Starter Development Kit User Guide
October 2006
VGA Display
6.
Download the Raw_Data_Gray.dat file into the SRAM as described
in
“Displaying Another Image from a Downloaded Bitmap File” on
.
The ImgConv tool also generates a Raw_Data_BW.dat file (and its
corresponding TXT format) for the black and white version of the image.
The BW Threshold in
defines the threshold for judging black or
white level. Raw_Data_BW.txt fills in the MIF/Intel Hex format for M4K
SRAM.
Table 4–1. BW Threshold
Image Source
R/G/B Band Filter
B&W Threshold
Filter
Output Result
(640x480)
Color Picture
R/G/B
N/A
Raw_Data_Gray
Color Picture
R/G/B (optional)
BW Threshold
Raw_Data_BW +
Raw_Data_BW.txt
Grayscale Picture N/A
N/A
Raw_Data_Gray
Grayscale Picture N/A
BW Threshold
Raw_Data_BW +
Raw_Data_BW.txt