Ali Corporation

Lun Liang

Shan Liu

Zhao-Dong Zhang

Feng Gao

Ben-Xiang Qu

Can Ping Zheng

A projection device and a projection picture correction method thereof are provided. When the projection device performs projection toward a projection surface, a plurality of target coordinates of a plurality of target vertexes are obtained based on a plurality of planes of the projection surface. The plurality of planes are not coplanar with each other, and the plurality of target vertexes form a target polygon. A first direction scaling process is performed respectively on a plurality of first image portions of an original trapezoidal image and a trapezoidal image block is generated. A second direction scaling process is performed respectively on a plurality of second image portions of the trapezoidal image block and a target image block aligned with the target polygon is generated. An output image including the target image block is projected onto the projection surface.

Projection device and projection picture correction method thereof

A projection apparatus and a keystone correction method thereof are provided. The projection apparatus includes a display processing circuit including an image processing circuit, a first keystone correction circuit, a rotation circuit, a second keystone correction circuit, and a video output circuit. The first keystone correction circuit performs first keystone correction processing on a processed image frame based on horizontal scaling processing to obtain a first corrected image frame. The rotation circuit performs rotation processing on the first corrected image frame to write a rotated image frame into a memory. The second keystone correction circuit reads the rotated image frame from the memory and performs second keystone correction processing on the rotated image frame based on the horizontal scaling processing to obtain a second corrected image frame. The video output circuit transmits the second corrected image frame to a projection module through a data transmission interface.

Projection apparatus and keystone correction method

A projection device and a projection image correction method are provided. Four target coordinates of four target vertices forming a target quadrilateral boundary are obtained. A first trapezoidal boundary is obtained according to a predetermined image boundary and a first coordinate component of each of the four target coordinates. At least one edge of the target quadrilateral boundary is extended until intersecting with at least one of two reference line segments to obtain a second trapezoidal boundary. Bases of the first trapezoidal boundary are perpendicular to bases of the second trapezoidal boundary. First direction scaling processing is performed according to the first trapezoidal boundary, and second direction scaling processing is performed according to the second trapezoidal boundary, to scale an original image into a target image block aligned with the target quadrilateral boundary in an output image. The projection device projects the output image to display a rectangular projection image.

Projection device and projection image correction method thereof

An image processing device and an image processing method are provided. A frame divider divides an original frame into a plurality of divided blocks. A multi-core circuit coupled to the frame divider and includes a plurality of processing cores and a frame stitching circuit. The processing cores perform an image processing process on the divided blocks to generate a plurality of processed frame blocks. The frame stitching circuit performs an image stitching process according to the processed frame blocks to generate a processed frame. The processing cores fetch the divided blocks and a plurality of extension pixels extending from the divided blocks to perform the image processing process, and a column number of the extension pixels is configured according to a window size requested by at least one window algorithm of the image processing process.

Growing community of inventors

Guangdong, China

Lun Liang