Threshold in image processing
显示 更早的评论
Hi guys.
I am beginner in image processing. I want to determine value of T. I have tried used global threshold for my image. However, the image become white. I read some article said sometimes global threshold are not suitable for image. So, i assume my image is not suitable for global threshold. So, anyone knows how to determine the value of T for this picture?
采纳的回答
Image Analyst
2014-12-30
0 个投票
What kind of thresholding algorithm you use really depends on the image and what you want to find in the image. Often, like in your case, you'll need to do some preprocessing before you can get to an image that can be thresholded. For example you would need to do color segmentation to pick out the color you want. Part of color segmentation involves thresholding. See my File Exchange for some color segmentation demos. http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862
2 个评论
Maximum
2014-12-31
Image Analyst
2014-12-31
No, it's not. Otsu is meant for gray scale images, not color ones, though you can do it on each color channel independently if you want. It may or may not segment out the exact color of blue that you're interested in - you just have to try it and see. If it doesn't then you'll have to derive your own algorithm. Otsu is best for high contract objects on a uniform background - images that have a histogram comprised of two well separated humps.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Image Thresholding 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
