High-Dynamic Range Projector, Additional Images
In addition to the images in the paper, here are some images that show
closeups of the HDR projection. The images here are of the version of
the HDR projection system where the the LCD panel is positioned out of focus.
This makes the system equivalent to the
HDR display system and we
can compensate for all effects with the same methods as used for the
HDR display (after appropriate alignment and calibration). Furthmore,
the following assumes that the reader is familiar with the idea of
Note further that all images have been made with the projector image
deliberately mis-aligned with the LCD panel, so that
identification of various features is easier. Any real implementation of
the system would of course align the images correctly and use the LCD
to compensate for the blur in the projection - as in the HDR display.
The first image shows a close-up of the HDR projection. While
the area where the black of the projector and LCD panel overlap
is noticeably darker than the area where only the projector (or
LCD) is black, this is only faintly visible in the images due
to the limited dynamic range of the camera used to take the images.
Another image, here the LCD panel is set to white (i.e. full transmissivity).
This shows how faint the "edge-effects" of the LCD panel are, while
the image projected by the digital projector remains in focus.
Here, the LCD panel has been moved further out of focus, which increases
the blur of the LCD. However, the projector image is still in focus. This
image also shows the reduction in contrast with increasing de-focus.