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Any difference in RGB data format between Pico 2.0 and DLP Lighcrafter for 1440Hz 1-bit Monochrome mode?

Hi 

I have a question about the relationship between RGB data and 1-bit monochrome patterns in 1440Hz monochrome model.

I used Pico 2.0 before. In the application report (DLPA021A-January 2010 - Revised October 2011), if I understand correctly, the figure (Figure 5, Page 9) indicates that the correspondence is as follows
1-bit pattern 0-7        -> Bits 0-7 of Blue
1-bit pattern 8-15 -> Bits 0-7 of Red
1-bit pattern 16-23 -> Bits 0-7 of Green
which means the RGB order should be  B->R->G

  Since Pico 2.0 has been dismantled, I am now using DLP Lightcrafter to implement the same function. I find there is   a matlab function 'LCRBitplanes.m' provided to convert 1-bit planes to 24-bit RGB image (http://software-dl.ti.com/dlp/embedded/catalog/dlp3000/matlab/LCRBitplanes.m). 

The function seems to indicate the correspondence is as follows 
pattern1_00.bmp - pattern1_07.bmp -> Bits 0-7 of Red (8-bit RED)
pattern1_08.bmp - pattern_1_15.bmp -> Bits 0-7 of Green (8-bit green)
pattern1_16.bmp - pattern_1_23.bmp -> Bits 0-7 of Blue (8-bit Blue)

which means the RGB order should be R->G->B

I would like to know if the change from (B->R->G) to (R->G-B) is a true difference between Pico 2.0 and DLP Lightcrafter or there is something I misunderstand.


Thanks,
Boyuan







  • Hello Boyuan,

    Unfortunately the order on in DLP LightCrafter is same as Pico2.0 the matlab sample code needs to be corrected.

    In short, LightCrafter follows  

    1-bit pattern 0-7 -> Bits 0-7 of Blue
    1-bit pattern 8-15 -> Bits 0-7 of Red
    1-bit pattern 16-23 -> Bits 0-7 of Green

    This is same as Pico2.0.

    Regards,

    Sanjeev

  • Hello Bouyuan,

    I have updated the Matlab script now to reflect the correct bitplane order  as:

    1-bit pattern 0-7 -> Bits 0-7 of Blue
    1-bit pattern 8-15 -> Bits 0-7 of Red
    1-bit pattern 16-23 -> Bits 0-7 of Green

    You should find the updated Matlab script on this webpage:

    http://software-dl.ti.com/dlp/embedded/catalog/dlp3000/dlp3000matlab.html

    Regards

    Manasi