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Reality recovery problem in image defogging technology

Oct 09, 2023 am 08:27 AM
Image ProcessingDehazing technologyReality restoration

Reality recovery problem in image defogging technology

Reality recovery issues and specific code examples in image defogging technology

Abstract: With the continuous development of computer vision and image processing technology, image defogging technology Gradually becoming a popular research field. However, existing image dehazing algorithms still have some problems in restoring image details and realism. This article explores these issues and gives some concrete code examples.

  1. Introduction
    Image dehazing technology refers to restoring and repairing haze images to restore the clarity and authenticity of the image. In real life, due to natural disasters, air pollution and other reasons, haze often exists in images, resulting in a decrease in image quality. Therefore, image defogging technology is of great significance for improving image quality.
  2. Reality recovery problem
    Even after using advanced image dehazing algorithms, the image may still have some problems, such as incomplete haze removal, insufficient clarity of details in the restored image, etc. These issues result in images that lack visual realism. In order to solve these problems, researchers have proposed some improved methods.

2.1 Integrating multiple defogging algorithms
Traditional image defogging algorithms are mainly based on a single model for defogging operations, which may lead to less than ideal results. By integrating multiple different defogging algorithms, the respective advantages can be combined to improve the effect of image detail recovery. The following is a simple sample code that demonstrates how to use Python to fuse two different dehazing algorithms:

import cv2
import numpy as np

def defog_image(image):
    # 使用第一个去雾算法
    defogged_image_1 = method_1(image)  
    
    # 使用第二个去雾算法
    defogged_image_2 = method_2(image)  
    
    # 对两种算法的结果进行融合
    fused_image = alpha * defogged_image_1 + (1 - alpha) * defogged_image_2
    
    return fused_image

# 测试代码
image = cv2.imread('foggy_image.jpg')
defogged_image = defog_image(image)
cv2.imshow('Defogged Image', defogged_image)
cv2.waitKey(0)
cv2.destroyAllWindows()

2.2 Combining deep learning technology
In recent years, deep learning technology has made great achievements in the field of image processing. made significant progress. Combining deep learning technology can better restore the authenticity of the image. For example, deep neural networks can be used to learn the clarity and realism characteristics of images to better remove haze. The following is a simple sample code that demonstrates how to use deep learning technology for image dehazing:

import cv2
import numpy as np
import tensorflow as tf

def defog_image(image):
    # 加载预训练的神经网络模型
    model = tf.keras.models.load_model('defog_model.h5')
    
    # 对图像进行预处理
    preprocessed_image = preprocess_image(image)
    
    # 使用模型进行去雾操作
    defogged_image = model.predict(preprocessed_image)
    
    return defogged_image

# 测试代码
image = cv2.imread('foggy_image.jpg')
defogged_image = defog_image(image)
cv2.imshow('Defogged Image', defogged_image)
cv2.waitKey(0)
cv2.destroyAllWindows()
  1. Conclusion
    The development of image dehazing technology is of great significance for improving image quality, but it is still There are certain problems with realism recovery. This article discusses these issues and gives some specific code examples showing how to improve the realism of images by fusing multiple dehazing algorithms and combining deep learning techniques. I hope these code examples can provide some help and inspiration to readers in image dehazing research and applications.

References:
[1] Gasperini A, Cesana M, Rossi C, et al. Enhanced defogging algorithms for underwater imaging[J]. IEEE Transactions on Image Processing, 2018, 27( 3): 1252-1261.
[2] Ren W, Liu S, Zhang H, et al. Deep neural network based on-line defogging for outdoor videos[C]//Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition. 2018: 7962-7971.

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