Which technique to use for Satellite Imagery?

Question

Ahmad 2024-5-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2118856-which-technique-to-use-for-satellite-imagery

回答： Image Analyst 2024-5-15

Hello,

I am new to image classification and am seeking to classify oil spills in SAR imagery using an unsupervised or adaptive thresholding method. I have experimented with various thresholding techniques, including Otsu, but none have consistently performed well across all SAR satellite images. While Otsu's method yields satisfactory results for some images, those containing land areas often obscure the oil spill, as depicted in the attached image.

Additionally, I have attempted mean shift segmentation, but it lacks adaptability, requiring a separate bandwidth setting for each image.

Could anyone provide guidance on which method or combination of methods to employ in order to achieve the desired results?

Thank you

2 个评论
显示无隐藏无

Ahmad 2024-5-15

anyone can answer?

Ahmad 2024-5-15

@Image Analyst

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2024-5-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2118856-which-technique-to-use-for-satellite-imagery#answer_1458416

在 MATLAB Online 中打开

After you display the image, call impixelinfo

imshow(sarImage, []);
impixelinfo

then mouse around over the displayed image and see what the values are in the known ground truth region. Then set a threshold to get those areas. Like let's say the values range from 10 to 20, then you'd do

mask = grayImage >= 10 & grayImage <= 20;