SD-MA-029
2
4.
Edge
B
lending
Configuration
Step1:
Parameter Settings
(see detail in chapter
Users set up the edge blending projection screen configuration here:
•
Layout of the edge blending
e.g. 1x2, 1x3, 2x2 and so on
•
Set up the overlap zone size, default is 240 pixels
Step2: Geometry Correction
(see detail in chapter
Geometry Correction (Image Warping) is the process of digitally manipulating image data such
that the image’s projection precisely matches a specific projection surface or shape. Image
geometry correction compensates for the distortion created by off-axis projector or screen
placement or non-flat screen surface, by applying a pre-compensating inverse distortion to
that image in the digital domain. Therefore, projection can be applied onto any non-flat
surfaces such as curve shape, corner walls and so on.
Step3:
Gamma Correction
(see detail in chapter
Because the edge blending overlapping zone will have a brighter than normal image, Gamma
Correction is performed on the edges to allow seamless merging of the images together. The
gamma correction is basically an S-shaped curve that is applied to gradually reduce the
brightness of the image at the edge, so that they can overlap properly.
S-curves below are for left and right projectors in the edge blending zone.
S-curves, when
properly overlapping, will add together to result in even brightness in the edge blending zone
same as the rest part of the projection screen
