The question remains, why even fiddle with edge blending to begin with? Can’t the projectors just be arranged so that their projected images are right next to each other? Both of those questions are easy to answer and suggest why edge blending is particularly useful. Still, edge blending is a valuable feature to look for in a projector, and a valuable skill to nail down. In most cases, edge blending isn’t necessary when putting together environmental projection imagery. And edge blending is typically only needed when the image is displayed on a surface that can be best described as environmentally neutral.
Fortunately, modern projectors are designed to facilitate edge blending modes, so a little fine tuning is all it takes. Going strongly horizontal or vertical is a simple way to execute an impactful look, but it does take a little fine tuning to get it right. It’s axiomatic that people prefer larger, more dramatically shaped images. Since DLP projections have low brightness for black images, they can offer higher contrast in multi-projection settings.For some applications, a single projector just may not cut it. Other technologies cannot output relatively low brightness for black images, which is already visible in a single projection setting In a multi-projection setting, projection overlap would amplify the brightness of black images, which cause them to be visually not black enough. (2.2) After image blending make brightness and color adjustments, including increasing the white level of the overlapping region, decreasing the black level at the non-overlapping region as well as adjusting RGB color parameters, so that the overall projection has both even brightness and color.Īccurate geometry positioning and consistent imagery would be able to satisfy the performance requirements of multi-projection.Ĭompared to other (LCD) projection technologies, DLP projection can produce dark (black) levels with much lower brightness. (2.1) Prior to image blending apply basic configurations to each projector, including setting the same picture mode, color temperature and brightness, and measures color parameters to lower the optical parameter differences between projectors. The higher the warping resolution (more grid blocks), the higher the amount of precision one can achieve, for a better seamless effect.Ģ. Aside from basic adjustment of the four corners, it also need to be able to freely adjust any regions within the projection, that way, it would be able to support edge blending of not only regular rectangle outputs, but also irregular shaped outputs such as arcs, columns etc.
Projector edge blending software software#
(1-2) In terms of geometry positioning, there are two methods in general, external software or built-in image warping/edge blending processor. By comparison, automatic adjustment offers not only higher precision and reliability, but also speedy geometry adjustment, which is convenient and saves time.
Projector edge blending software manual#
There are two ways to adjust them, the first one is manual adjustment, which is a knob for Lens Shift, and a ring for Zoom, the second one is automatic adjustment. (1-1) Optical Alignment, adjustment of the Lens Shift and Zoom of lens increases the precision and flexibility of projection locations. Geometry adjustments for seamless edge blending precise geometry adjustment), the second is image consistency (i.e.
With them, image blending would be much easier conversely, it would be impossible to overcome certain issues if some of the criteria are not met, such as resolution or lens differences.Īside from calculation for spacing between installations and projection size for stitching, there are two main factors for a successful multi-projection, the first is seamlessness (i.e. This can be considered a priori criteria necessary for a successful multi-projection setup. The best way to achieve parameter consistency such as brightness and color etc., is to choose machines from the same batch of production, with similar parameter configurations. (4) Similar color parameters, pick specific configurations including color temperature and chromaticity coordinates. (3) Similar brightness, machines with near the same hours of use Projection brightness will deteriorate as hours of use increases (2) Same throw ratio and lens with the same focal length range
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