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A Method for Removing Local Light Differences in Old and New Time Phase Images Based on Color Migration

A technology of color migration and time phase diagram, which is applied in the field of image processing, can solve problems such as interference, achieve the effect of improving accuracy and solving light interference

Active Publication Date: 2021-06-29
SOUTHEAST UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method for removing local light differences in the old and new time phase images based on color migration. The present invention effectively solves the light interference existing in the current image shadow difference method

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  • A Method for Removing Local Light Differences in Old and New Time Phase Images Based on Color Migration
  • A Method for Removing Local Light Differences in Old and New Time Phase Images Based on Color Migration
  • A Method for Removing Local Light Differences in Old and New Time Phase Images Based on Color Migration

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[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] A method for removing local light differences in old and new time phase diagrams based on color migration of the present invention, such as figure 1 The following steps are shown:

[0054] Step 1: Store the picture information of the fixed-point surveillance shooting area into the database, and mark the time and place of shooting on the picture for future comparison. The size of the picture is 1920*1080.

[0055] Step 2: Read the old and new phase images from the database, and ensure that the interval between the two images does not exceed 7 days.

[0056] Step 3: Use the SIFT (Scale-invariant feature transform) algorithm to register the old and new phase images to remove the impact caused by camera shake and shake.

[0057] Step 4: Record...

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Abstract

The invention discloses a method for removing local light difference in a new and old phase diagram based on color migration, which relates to the field of image technology and includes the following steps: establishing a monitoring area information database; performing image registration on the new and old phase diagrams; The integral diagram of the phase diagram; in order to better describe the local difference in the old and new phase diagrams, we calculate the normalized cross-correlation NCC value between the corresponding windows in the old and new phase diagrams; calculate the local mean and local variance of each pixel in different window sizes; perform color migration to obtain the target image; perform pixel value difference between the target image and the new phase image, if the If the pixel difference value of the point is greater than the threshold, the pixel value of the point in the target image is set as the pixel value of the new phase image. The invention eliminates the local illumination difference in the old and new phase images based on color migration, and improves the accuracy of extracting suspicious change areas of illegal buildings.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for removing local light differences in old and new phase images based on color migration. Background technique [0002] In today's society, land is a precious natural resource that human beings rely on for survival and development, and the sustainable use of land is the cornerstone of the sustainable development of human society. Today, with the increasing population, especially in our country, the land is under enormous pressure, and the relationship between man and land is becoming increasingly tense. Illegal buildings and illegal use of land are one of the main reasons for China's current dilemma. Therefore, we urgently need to efficiently and accurately find out suspicious areas of illegal buildings. [0003] The process of identifying illegal buildings is extremely susceptible to complex environmental interference, especially the false changes caused by i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/33
CPCG06T7/33G06T5/92G06T5/77
Inventor 何荣开陈孝烽张小国
Owner SOUTHEAST UNIV
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