Checking the type of Image in '' if '' statement

Question

Dimitris M 2012-6-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/42065-checking-the-type-of-image-in-if-statement

Hello

I have a simple question that bother me a lot in making a function. I want the function to take as input either a label image or rgb image. I do not know how to program the function to check what is the format of the input image and the process it accordingly.

Is there a simple way to determine between two input image formats ?

Thank you in advance

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2012-6-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/42065-checking-the-type-of-image-in-if-statement#answer_51807

RGB images have 3 dimensions. Label images do not (well, not unless you label a 3 dimensional object.)

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Walter Roberson 2012-6-26

You cannot tell the difference between a label image that contains only 0 and 1 for labels, compared to a grayscale image that uses 0 for black and 1 for white and no other values. Both images would be floating point and the same range.

grayscale images can be an integer data type. Label images will (as far as I _remember_ be produced as floating point. But grayscale images can be floating point as well, in which case their values must be between 0 and 1. If you have a floating point array that has a value above 1 then it cannot be a grayscale image.

请先登录，再进行评论。

Answer 2

Dimitris M 2012-6-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/42065-checking-the-type-of-image-in-if-statement#answer_51808

Yes, this is correct but in some cases I introduce grayscale image (not mentioned above) . Is there a general solution for reading in information about every kind of image ?

Thank you