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Method and system for correcting a distorted input image

A technology for inputting images and images, applied in the field of correcting distorted input images, can solve the problems of increasing costs, large input buffers, etc., and achieve the effect of increasing the occupied space

Active Publication Date: 2020-09-04
FOTONATION LTD
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Problems solved by technology

While such an approach may be simple from a control perspective, it requires relatively large input buffers, and this can significantly increase the cost of implementing such a function

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  • Method and system for correcting a distorted input image
  • Method and system for correcting a distorted input image
  • Method and system for correcting a distorted input image

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Embodiment Construction

[0025] see now figure 2 , as in EP3101622 (ref: FN-384-EP2), embodiments of the invention are based on partitioning an image into tiles, where the pixels of any given image tile share a common distortion. In this embodiment, each tile is defined by four nodes representing the corner coordinates of the tile. In this specification, the parameter (u,v) indicates the distorted input image coordinates, while the parameter (x,y) indicates the corrected output image pixel position, i.e., the input image indicating the output image pixel at position x,y The u,v coordinates of the distorted locations of will tend not to coincide with the input image pixel locations. exist figure 2 In the example of , regions of 4×4 tiles are grouped into macroblocks bounded by nodes 0...4, 9, 14, 19, 24...20, 15, 10, and 5, while in Figure 7 In the example of , the macroblock includes 4×3 tiles. In any case, the area of ​​the macroblock then forms a grid defining the distortion of the image. In...

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Abstract

A method for correcting an image divides an output image into a grid with vertical sections of width smaller than the image width but wide enough to allow efficient bursts when writing distortion corrected line sections into memory. A distortion correction engine includes a relatively small amount of memory for an input image buffer but without requiring unduly complex control.The input image buffer accommodates enough lines of an input image to cover the distortion of a single most vertically distorted line section of the input image. The memory required for the input image buffer can be significantly less than would be required to store all the lines of a distorted input image spanning a maximal distortion of a complete line within the input image.

Description

technical field [0001] The present invention relates to methods and systems for correcting distorted input images. Background technique [0002] EP3101622 (reference: FN-384-EP2) discloses a method for correcting a distorted input image stored in memory, which method comprises dividing a local area of ​​the image to be displayed into a grid of rectangular tiles, each image Blocks correspond to distorted patches with non-rectangular boundaries within the input image. For each tile of the local area, maximum and minimum memory address locations of consecutive rows of the input image sufficient to span the boundary of the distorted tile are determined. Read consecutive lines of distorted input between the maximum and minimum addresses. The distortion of the non-rectangular portion of the distorted input image is corrected to provide stored tiles of the corrected output image. [0003] While the distortion correction method of EP3101622 is useful in many applications, the Dis...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2200/28G06T2207/20021G06T5/80G06T5/00G06T3/4007
Inventor V·吉奥尔吉斯卡P·斯特克
Owner FOTONATION LTD
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