Adding haze to image

Hi for all , How I can add haze to image Thank you

Answer 1

[Image Analyst]

Use rand() to add an offset and a slight amount of noise. ofr a grayscale image, try this:

maxGL = max(grayImage(:));
hazyImage = uint8(double(grayImage) + 240 - maxGL + 10 * rand(size(grayImage)));
figure;
subplot(1, 2, 1);
imshow(grayImage);
subplot(1, 2, 2);
imshow(hazyImage);

[hussein ali]

I do not know how I thank you , thank you very much , but this does not work I have research and I need your help please

[Image Analyst]

Well I think it does work but maybe you don't think it's realistic enough. In that case I invite you to look at the Vision Lab at the University of Dayton that does research into fog and haze removal. Perhaps if you know how it's removed you can learn what constitutes realistic haze and you can generate it. See this link University of Dayton Vision Lab.

[hussein ali]

Again many many thanks my teacher for your answer

[hussein ali]

my teacher Thorsten May I know why use 240 thank you

[Image Analyst]

I'm not Thorsten but since the 240 was in my code I'll answer anyway. Basically I wanted to brighten the image and add a bit of noise to make it look hazy.

I subtracted maxGL to get the image all negative.

Then I added up to 10 gray levels of noise. So now the gray levels go from large negative up to as much as 10.

Then I added 240 to brighten the image. Whatever the old max was, it will now be at 240. For example it might have been at 130 - doesn't matter - now it will be at 240 so it looks brighter. Then there's still the 10 gray levels of noise on top of that so the image goes to as bright as 250 gray levels. You can change the 240 to be whatever you want, to map the old max brightness to a new level.

[hussein ali]

Thank you so much my teacher

Answer 2

[Amjad Mushtaq]

image=imread('image2.jpg');
subplot(2,2,1); imshow(image);title('imege');
a=imcomplement(image);

subplot(2,2,2);imshow(a);title('incomplement');
b=imreducehaze(a);  % this is hazy filter code
subplot(2,2,3);imshow(b);title('hazy filter');

[Walter Roberson]

Ah, but the question was how to add haze, not how to remove it.

Answer 3

[GNANA PRAKASH]

maxGL = max(grayImage(:));
hazyImage = uint8(double(grayImage) + 240 - maxGL + 10 * rand(size(grayImage)));
figure;
subplot(1, 2, 1);
imshow(grayImage);
subplot(1, 2, 2);
imshow(hazyImage);