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3.10.4.
Blend Width
The blend width menu provides sliders to set up the overlap region for left, right, top and bottom blend
region. When changing the slider value from within the OSD the blend area is not updated live/
immediately. An update is forced when pressing the menu/enter button, the slider is replaced by the
menu.
The overlap is set up in output pixels with a range of up to a third of the output resolution. For a
configuration with two projectors in horizontal direction the overlap can be up to two thirds to allow 16:9
images to be made using two combined projectors with an aspect ratio of 4:3 or 5:4.
An offset for the blend region can be set-up as well. The region between the edge and the start of the
blend area is black.
Note: Each HQView unit needs to be provided with the exact same value for left and right blend region.
Top and bottom blend region have to be identical as well, but don´t need to have the same value as left
and right. The HQView units do not communicate between each other and thus they have to make an
assumption for auto zoom calculations and that is overlap of the neighbouring (and those beyond)
projectors is identical.
3.10.5.
Blend Curve Type
The blend curve type menu allows to set the blending characteristics. For setting up the overlap the
Align Pattern should be used. Align Patter reduces the image intensity of each pixel in the blend area by
half. When the blend region set up through the blend width menu and the physical blend match the S-
Curve characteristics can be switched on. The image intensity is gradually reduced from the start of the
blend to the edge of the respective projector image. The S-Curve Value slider allows to control the
steepness of the S-Curve. For convenience in this Blend Curve menu a duplicate of the Output Gamma
slider can be found to match the grey scale of the images.
When a custom alpha map was loaded into the file system of the unit it is recognized at boot time and
the Custom Alpha Map menu item becomes available. Custom alpha maps can be uploaded through
the web or remote control API interface of HQView. The map can be switched on and off. The map is
combined with the Align or S-curve map internally generated. If that is not wanted Blend Curve Type has
to be set to off.
The blend map can be warped or left unwarped. Typically, Blend Warping is set to yes at all time.
Automatic calibration systems may decide to calculate the blend warp rather than using HQView for this
purpose. Automatic systems control HQView through API calls, in which case the Blend Warping is set
automatically and does not need to be touched.
©
Calibre UK Limited Issue 2.40
nd
22
April 2013
21
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