What is the best way to project a large number of patterns using the DLP?

Cheryl Seow

Hi,

I am using the DLP LightCrafter 4500 to project pre-defined monochromatic (green) patterns onto a screen. I know that one way to do it would be to use the in-built flash memory, but this does not have a large enough storage for our purposes. Therefore I am using the DLP in pattern mode, with video input, so it runs as a secondary screen. I selected only one bit frame, so it is constantly showing only the same bit frame of the 24-bit video input. MATLAB is then used to show the patterns onto the screen (using the function imshow). However, this method is quite slow. I have also tried putting my patterns into a video and playing it on this secondary screen, but have met with the problem of dropped frames.

Do you have any advice on how to do this better?

Thank you.

Best Regards

Cheryl

over 9 years ago

0 Clinton Rodgers over 9 years ago

TI__Genius 13235 points

Hi Cheryl,

Have you looked into http://psychtoolbox.org/ before? I have not used it myself, however the 3D scanner course @ Brown University (http://mesh.brown.edu/byo3d) references it.

Let us know if this works out.

Thanks,
Clinton

0 Cheryl Seow over 9 years ago in reply to Clinton Rodgers

Prodigy 235 points

Hi Clinton,

Ah thanks! I'll check it out!

Best Regards

Cheryl

0 Cheryl Seow over 9 years ago in reply to Clinton Rodgers

Prodigy 235 points

Hi Clinton,

I am still checking out PsychToolbox, and on first look it seems like it might do the job. But could I check with you, is this the best DLP settings for my purposes (that is, pattern mode with video input and the selection of a single monochromatic bit frame)?

Thank you for the advice!

Best Regards
Cheryl

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What is the best way to project a large number of patterns using the DLP?