使用MATLAB进行图像对象定向和旋转

Question

我有近1000张类似数据集的图像，它们都有黑色背景和物体（皮肤癌痣）。现在问题很明显，即物体处于不同的方向，我希望所有图像中的物体具有相同的方向。

建议使用MATLAB代码。

Answer 1

回答：   检查下面显示的皮肤病变痣的两个图像：

我们假设它来自文件夹（1000张图像）上的循环，它们位于：

Code:

  % I1= first image
    I=imread(I1);    %% Image input 
    BW = im2bw(I,0.004);

  %%%%%  Getting the biggest region (because if segmentation give unclear results)

  [L, num] = bwlabel(BW, 8);
  count_pixels_per_obj = sum(bsxfun(@eq,L(:),1:num));
  [~,ind] = max(count_pixels_per_obj);  
  biggest_region = (L==ind);

  %%%%%% 

   %%% getting orientation

   s  = regionprops(biggest_region, 'Orientation');
   data=s.Orientation;

   %%% Orientation end

    Y = imrotate(I, -data, 'loose', 'bilinear');

      figure; 
      imshow(Y)

  %%% Now the rotated image will be shown as

  %% Now write the image in any other folder
  %% that have all images aligned

  imwrite(Y, 'test.jpg'); 

 %% Hope it will save time for other. Thanks