Monday, January 17, 2011

An Example Of True Anamorphic Video

I recently used a true HD [1920 x 1080] video camera and recorded video through my MK4 Aussiemorphic Lens. The lens was set up in the same orientation as it would be used for projection, except the device behind the lens is a camera, not the projector. The 1.33x horizontal expansion optics compress the light entering the camera's lens resulting in a field of view 33% wider than what the standard HD camera can capture. Therefore the image appears horizontally squeezed as if it were scaled for CIH in the projector. The difference here is that image was captured at full 1920 x 1080 rez, not taking a letter boxed image and scaling it to fit the panel as we currently have to do for Blu-ray Disc in a Constant Image Height system.

Captured Image
The Camera records the video clips as MP4 which plays back through Windows Media Player. To view this on my system at 1:1 pixel mapping, I connect the Laptop to the system via HDMI and select Projector Only [Windows key+P for Windows 7].
Projected Image
To restore the geometry, I simply project the video through the MK4 lens using REAL mode on the projector. REAL mode is a true 1:1 pixel mapping mode. The MK4 optically expands the image to fill the screen. Therefore, any possible scaling artifacts from electronically scaling the image first have been eliminated.

NB: The images in this post are not true screen shots, rather doctored images from the original file. The 1st image has been reduced by 25% in both H and V, and I've added the side pillars in Paint. The 2nd image was simply the original image with 25% reduction to the height only. Both images are representative of what is seen on screen with and without the lens. 



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