Talk:10359 DWT

2008/12/09

1. Tested with black line ends (tried white also) - this not deals with the problem I think - that false lines are in the beginning/middle of a frame line. After I added white ends to the channel 2 (write channel) - got a worse picture but false some of the false lines are on the same place - trying it in simulation.

step 3 bad pic

2008/12/08

1. Played with timing constraints but they seem to take no effect on the picture. There are line ends that I can make black and check on the picture - because that light blue lines on picture 2 don't depend on the test and short lines on the top of the 3rd picture don't depend also.

step 1, direct	step 2, 1st SDRAM vertical read	step 3, 2nd SDRAM horizontal read

2008/12/05

1. Got a little noise on the top of the frame due to bad timing - trying to apply proper constraints.

step 1, direct	step 2, 1st SDRAM vertical read	step 3, 2nd SDRAM horizontal read

2008/11/18

1. Solved. Datapath is ok now. The mistake was in programming tile's x-sizes and shifts for a large frame (and in tests everithing was correct).

2008/11/13

1. Made datapath to/from memory for the tranform (added 2 channels) Currently get a set of 3 frames:

step 1: frame from channel 1 goes directly to 353 and to the memory at the same time.

step 2: line by line frame is read from the memory and is written back to another location line by line: "read_line - write_line - read_line - write_line ..."

step 3: line by line frame is read from the memory.

step 1, direct	step 2, 1st SDRAM read	step 3, 2nd SDRAM read

Comments:

1. Feels like locations overlap somehow - this should be checked

2. No mistakes in the simulation stage (frames are 1620x4).

2008/07/31

Solved - 1. "right part is lost" - solved - mistake was in ch2_N_fp - line size in pixels

2. Made *.bit - board doesn't see sensors

2008/07/29

1. Simulation: output image is incorrect - right part is lost

2008/07/25

1. adjusted mcontr to read/write blocks to DDR

a. verified and corrected mistakes

TODO: adjust frame size more properly

2008/07/15

mcontr for block read/write is under work.

useful note:

1. SA[24:23]= Bank[1:0]
2. SA[22:10]= Row[12:0]
3. SA[9:0]  = Col[9:0]

4. SA[12:8] - ...

2008/07/08

Basic 1D DWT for the whole frame is done. For each pixel in the Bayer Pattern should be calculated a separate DWT (because the difference can be significant?) - when I calculate mean value between neighbours (e.g., R & G) - the resulting picture is strange.