Method and device for enhancing image details and terminal
A technology for enhancing images and details, applied in the field of image processing, can solve the problems of complex algorithms, enhanced details, excessive noise amplification, etc., to achieve the effect of improving visual effects, avoiding noise amplification, and enhancing image details
Active Publication Date: 2018-12-14
SPREADTRUM COMM (TIANJIN) INC
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Problems solved by technology
In contrast, the local histogram equalization method is more universally applicable, but this method will over-amplify the noise while enhancing the details
For some scenes with a high dynamic range, the results suitable for display can be obtained through multi-frame fusion. However, when there is local motion between frames, the fusion results are prone to ghosting problems, resulting in loss of details in dark or bright areas, and do It is very difficult to accurately align multiple frames of images, and the algorithm is too complicated, making it difficult to apply to mobile devices such as mobile phones
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[0091] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0092] The present invention provides a method for enhancing image details, such as figure 1 As shown, the method includes:
[0093] S101. Determine whether the input image reaches a specified brightness according to the histogram distribution of the input image;
[0094] S102. When the input image reaches the specified brightness, divide t...
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The invention provides a method and device for enhancing image details and a terminal. The method comprises the following steps: judging whether an input image reaches the specified brightness according to the histogram distribution of the input image; when the input image reaches the specified brightness, dividing the input image into blocks and calculating the histogram distribution of each image block; judging whether a flat area block exists in the input image according to the histogram distribution of each image block; when the input image has a flat area block, recalculating the image enhancement range; adjusting the mapping curves of each image block; for each pixel point, recalculating the gray level of the pixel point according to a mapping curve of a specified number of image blocks adjacent to the pixel point; obtaining the output image by Gaussian filtering of the image with all pixel gray values calculated. The invention can enhance image details and avoid amplification noise, thereby improving the visual effect of the image.
Description
technical field [0001] The present invention relates to the technical field of image processing, in particular to a method, device and terminal for enhancing image details. Background technique [0002] With the continuous improvement of mobile phone camera pixels, we can obtain larger images and see more image details. However, due to many reasons such as the shooting environment, the image details are not clear enough, the overall image contrast is low, and some details are submerged or lost, etc., so that the visual effect of the image cannot fully meet people's requirements. [0003] Common methods to enhance image details include global histogram equalization, local histogram equalization, dynamic range compression, etc. Among these methods, global histogram equalization is efficient and easy to implement, but the enhancement effect on some scenes is weak due to applying a uniform transformation to the whole image. In contrast, the local histogram equalization method ...
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CPCG06T5/40
Inventor 刘千顺蔡进王浩熊伟华
Owner SPREADTRUM COMM (TIANJIN) INC