A method for image brightness equalization of aerial digital camera
A digital camera and image brightness technology, applied in the field of image processing, can solve the problems of color abnormality, aerial image processing and use value impact, color layering reduction, etc., and achieve the effect of simple method steps, fast processing speed, and uniform brightness value.
Active Publication Date: 2020-11-13
XIAN MEIHANG APPL OF SATELLITE DATA
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However, a common problem in UAV aerial photography imaging is that the central part of each image in the aerial image taken by UAV is relatively bright and the color levels are relatively rich; while the edge parts of the image, especially the four corners of the image Near the corner, the overall brightness is dark, and the sense of color layering is significantly reduced. In this way, when the aerial images are stitched and mosaiced, there will be significant color anomalies, that is, relatively dark bands appear in the overlapping areas of adjacent aerial images. , has a certain impact on the processing and use value of the later aerial images; in addition, during the aerial image capture process, the overall brightness of the image captured by each flight is closely related to the local time of the survey area, that is, the noon period of the local time, The sun's altitude angle is the largest, the solar radiation reaching the ground is the strongest, and the obtained aerial images are generally the brightest
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[0031] Such as figure 1 with figure 2 As shown, the aerial digital camera image brightness equalization method of the present invention includes the following steps: Step 1, collection and uploading of aerial digital camera images: adopt aerial digital camera 1 to carry out aerial photography of the survey area, obtain the survey area aerial photograph image, and Upload the acquired survey area aerial images to the processor 3 through the image transmission module 2, wherein the quantity of the survey area aerial images is N pieces;
[0032] Step 2. Filtering of the aerial images of the survey area: first, use the processor 3 to call the low-pass filter module to filter the N aerial images of the survey area received by the processor 3 respectively, and obtain N aerial images of the survey area after filtering ; Then, the processor 3 is used to call the pixel point calculation module to perform pixel point calculation processing on the N aerial images of the filtered measuri...
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The invention discloses a method for equalizing the brightness of aerial digital camera images, which includes: Step 1, collection and uploading of aerial digital camera images; Step 2, filtering of aerial images of the measurement area; Step 3, calculation of the brightness equalization coefficient; 4. Aerial digital camera image brightness equalization processing and synchronous output. The invention has simple steps and is easy to implement. It performs brightness equalization processing on aerial digital camera images through the brightness equalization coefficient. The processing speed is fast and the effect is good. It can be suitable for UAV aerial photography imaging processing needs and has strong practicability.
Description
technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image brightness equalization method of an aerial digital camera. Background technique [0002] UAV aerial photography has more and more applications, especially in the production of large-scale aerial images within a certain range. UAV aerial photography has the advantages of high efficiency, flexibility, and real-time. However, a common problem in UAV aerial photography imaging is that the central part of each image in the aerial image taken by UAV is relatively bright and the color levels are relatively rich; while the edge parts of the image, especially the four corners of the image Near the corner, the overall brightness is dark, and the sense of color layering is significantly reduced. In this way, when the aerial images are stitched and mosaiced, there will be significant color anomalies, that is, relatively dark bands appear in the overlapping area...
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IPC IPC(8): G06T5/00G06T7/90
CPCG06T7/90G06T5/00
Inventor 万余庆
Owner XIAN MEIHANG APPL OF SATELLITE DATA