A method for removing the mirror reflection effect of windows in night scene images
A technology of specular reflection and reflection effect, which is applied in image enhancement, image data processing, instruments, etc., can solve the problems of large amount of calculation and poor versatility of iterative algorithm, and achieve the effect of saving processing time
Inactive Publication Date: 2017-05-17
TIANJIN UNIV
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Problems solved by technology
Although the above method can effectively suppress the reflection effect, it usually requires the photographer to master certain photography skills or use specific tools, so the above method is not universal
Literature [5] and Literature [6] realize the separation of reflection scenes by means of manual assistance. This type of method only requires a single image, but requires manual input. In addition, the iterative algorithm used in the separation process has a large amount of calculation, so it is only suitable for a small number of images. Image condition
[0005] The focus of recent research has returned to the idea based on multiple images, but when shooting different images, there is no need to adjust the parameters of the camera, just change the shooting angle, so that there is a certain difference in the angle of view of the reflection components of different images
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[0050] The method proposed by the invention includes three main steps: image acquisition, reflection area positioning by means of user-assisted input, reflection effect removal and the like. figure 2 A block diagram of the proposed method is given.
[0051] Step 1: Image Acquisition
[0052] According to the requirements of the method proposed in this patent, the following three points need to be done when shooting night scene images:
[0053] (1) It is necessary to take two images, and ensure that the focal length, aperture, exposure and other parameters of the lens remain unchanged during shooting;
[0054] (2) When taking two images, ensure that the two images are in the same plane;
[0055] (3) When changing the position of the camera to take images, the camera can move horizontally or vertically in the same plane, but the size of the required displacement should ensure that the reflection scene is complete, and there is a certain difference in the position of the refle...
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The invention relates to a night scene image window mirror reflection effect removing method comprising the following steps: two night scene images with a reflection effect in the same background are acquired; reflection regions are positioned; whether the reflection regions overlap is judged; processing is performed according to different conditions; first, if the reflection regions do not overlap, the reflection effect is removed; second, if the reflection regions overlap, the non-overlapped parts of the reflection regions are processed according to the situation in which the reflection regions do not overlap; and corresponding processing is performed on the overlapped parts of the reflection regions, and finally, an overall background image is obtained. By adopting the method of the invention, the reflection effect can be removed quickly, and the visual quality of night scene images can be enhanced.
Description
[0001] Technical field [0002] The invention relates to a method for removing specular reflection effect of color digital photos. Background technique [0003] When consumers living in high-rise buildings use digital cameras or smartphones to shoot scenes outside the window indoors, due to the existence of glass windows between the camera and the shooting scene, they are often affected by the specular reflection phenomenon of the indoor scene. This reflection interference phenomenon is particularly obvious when shooting night scene images. figure 1 Shown is a night scene image with specular reflection effect. The bright area in the upper right of the picture does not really exist in the background, but is caused by the reflection effect of the indoor bright area through the window glass. Apparently, the existence of reflective areas seriously affects the visual quality of night scene photos, so it is very necessary to propose how to remove such reflection effects and restore...
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IPC IPC(8): G06T5/50
Inventor 王建刘长波
Owner TIANJIN UNIV