Question

我有一个空白img，其中包含大小为x，y，3的所有零。我有一个线性索引数组，例如

[1 10 99 1562]

我将颜色设置为1、1、3双精度数组，例如

color(:,:,1) = 100
color(:, :, 2) = 200
color(:,:,3) = 100

如何将img的所有索引设置为该颜色？

Answer 1

带有循环：

[r, c] = ind2sub(size(A(:,:,1)),ind); %Getting corresponding row and column subscripts
for k = 1:numel(ind)
    A(r(k),c(k),:) = color;           %Changing each of them to desired color
end

或向量化解决方案：

%Creating a mask
mask = false(size(A(:,:,1)));   mask(ind) = true;
%Transferring the color to the mask
A = mask.*color;    %Impl.exp., use A = bsxfun(@times,mask,color) in <R2016b

MATLAB-从线性索引数组+颜色创建img

1 个答案: