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Method for treating texture distortion area of digital orthoimage

A digital orthophoto and orthophoto technology, which is applied in image data processing, image enhancement, image analysis, etc., can solve the problems of poor use effect and low efficiency

Inactive Publication Date: 2014-12-03
AERIAL PHOTOGRAMMETRY & REMOTE SENSING CO LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for processing the garland area of ​​a digital orthophoto image in view of the deficiencies in the above-mentioned prior art. The latte processing method with orthophoto has problems such as low efficiency and poor use effect

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  • Method for treating texture distortion area of digital orthoimage
  • Method for treating texture distortion area of digital orthoimage
  • Method for treating texture distortion area of digital orthoimage

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Embodiment Construction

[0052] Such as figure 1 A processing method for the garland area of ​​a digital orthophoto shown, comprising the following steps:

[0053] Step 1. Obtain the original measurement data of the measured area: perform aerial photogrammetry on the measured area, take the aerial photographic image of the measured area, and obtain the original measurement data of the measured area; the original measurement data is DEM measurement data, The DEM measurement data is digital elevation data.

[0054] Step 2. Determination of the ground grid range of the orthophoto: First, according to the original measurement data described in step 1, obtain the corrected image of the currently processed aerial photographic image in step 1, and the corrected image is based on the currently processed aerial photographic image The grid image formed by dividing the projection range on the ground and the ground resolution of the orthophoto to be generated, the size of the grid image is the same as the size o...

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Abstract

The invention discloses a method for treating a texture distortion area of a digital orthoimage. The method comprises the following steps: I, obtaining original measurement data of a measured area; II, determining a ground grid range of the digital orthoimage; III, detecting texture distortion, namely respectively performing texture distortion detection on each grid point on a corrected image of a currently treated aerial photography image through the following processes: 301, determining the direction of projection light; 302, judging texture distortion, namely judging whether other grid points identical to the pixel point to which the current detected point corresponds on an original image exist or not along the determined projection light; if so, judging the currently detected point as a 'texture distortion' point; if not, judging the currently detected point as a 'non-texture-distortion' point; and IV, correcting the image, namely correcting the currently treated aerial photography image according to the result of the texture distortion detection. The method has the advantages of simple steps, reasonable design, high efficiency and good using effect and can be used for solving the problems of low efficiency, poor use effect and the like in the existing orthoimage texture distortion treating method.

Description

technical field [0001] The invention belongs to the technical field of aerial photogrammetry, and in particular relates to a processing method for a digital orthoimage latte area. Background technique [0002] Orthophoto production refers to the process of simultaneously removing image distortion caused by terrain relief and photo tilt. The orthophoto is based on the relevant parameters and the digital elevation model (DEM), using the corresponding conformation equations to calculate the image point coordinates corresponding to the ground points, and resampling the original image in grayscale, so that it becomes an image with the correct plane position There is also a technology for images with rich texture information. [0003] The orthophoto is the result of differential correction and grayscale resampling of the original image, but the original image cannot guarantee that every position on the ground can be imaged in the image due to the influence of central projection a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/00G06T7/00
CPCG06T7/344G06T7/38G06T7/49G06T2207/10032G06T2207/10044
Inventor 刘敏郭永春梁菲姚春雨左涛
Owner AERIAL PHOTOGRAMMETRY & REMOTE SENSING CO LTD
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