Hi I am using a DLP LIGHTCRAFTER dev kit.
So far I have been happy when I used the internal memory with 96 images of 1bit depth. Unfortunately my application needs more frames so I try to use external pattern with HDMI.
my settings are the Followings: HDMI 60Hz Monochrome 6bit colour depth giving a 240fps
my full movie is a rotating dot, so each pattern is a dot which has been displaced of a certain angle around the center of the screen
as there are 4 positions of the dot in one frame It is obvious i have a strange colored picture such as this one:
when I record the projected pictures with a high speed camera I don't got the expected result.
What I see is that the following patterns are not displayed in the right sequence, but instead "jump" from one pattern to another. In a regular way I recon, but not the good one for me.
I am doing it on Matlab, here is my following code:
% from the dlpDevelopperGuide
% Blue [5:0] 1 Monochrome [5:0]
% Red [3:0], Blue [7:6] 2 Monochrome [5:0]
% Green [1:0], Red [7:4] 3 Monochrome [5:0]
% Green [7:2] 4 Monochrome [5:0]
IMG_R = [Pat2(:,3:6) Pat3(:,1:4) ];
IMG_G = [Pat3(:,5:6) Pat4(:,1:6) ];
IMG_B = [Pat1(:,1:6) Pat2(:,1:2) ];
rgbImage = cat(3, IMGA_R_mat1, IMGA_G_mat1, IMGA_B_mat1);
rgbImage = uint8(rgbImage);
Pat1,Pat2 ,Pat3 ,Pat4 are the 6bit depths of each of the 4 patterns, that are put into one frame
I then create a uncompressed avi file with all my frames. the normal avi file looks like there are problems to uncompress by the FPGA, there are "bright shadows": wrong activation of pixels around the dot
My questions are the followings:
1) Is there any additional information I need to know to compress correctly my pattern into the RGB888 frame, or am I missing something?
2) I tried to read the movie on the DLP as a second monitor with both Matlab or VLC and non of them worked. What I want: each pattern at a time (every 1/240 sec) with the position of my dot moving smoothlyfrom one position to the other NOT COMING BACK JUMPING TO THE NEXT AND STOP or different funny sequences.
I tried to change the frame compression order such as RGB - BRG and some others but could manage to get what I
Trigger out is ok 240Hz
Thank you in advance
Leandre
