未定义功能'登录'类型'UINT8“的输入参数 [英] Undefined function 'log' for input arguments of type 'uint8'

问题描述

我一直在试图生成图像。

i have been trying generate an image.

C1 = imread(InputImage);
NumberOfGrayLevels=32;
I= 0.299*C1(:,:,1)+0.587*C1(:,:,2)+0.114*C1(:,:,3);
C = 0;
I=(C*log(I+1))';
new=uint8(mat2gray(I)*(NumberOfGrayLevels-1));
[m,n]= size(new);
rgb = zeros(m,n,3);
rgb(:,:,1) = new;
rgb(:,:,2) = rgb(:,:,1);
rgb(:,:,3) = rgb(:,:,2);
new = rgb/256;
imshow(new,[]);

no9=figure;
image(new);

错误是表示I =（C *日志（I + 1））'; ..你能告诉我怎么解决这个

the error is showing at I=(C*log(I+1))';..can you tell me how to solve this?

推荐答案

最有可能的 C1 的类型为 UINT8 。你应该把它转换，即：

Most probably C1 is of type uint8. You should convert it, i.e.:

C1 = imread(InputImage);
C1 = double(C1);
NumberOfGrayLevels = 32;
I = 0.299*C1(:,:,1) + 0.587*C1(:,:,2) + 0.114*C1(:,:,3);
.....

如果你不转换 C1 到双击，那么 I 也将键入 UINT8 - 它不包含你想要什么，登录功能将无法正常工作吧。

if you don't convert C1 to double, then I will also be of type uint8 - it will not contain what you want and log function will not work with it.

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