作爲parfor goind的Matlab「Assertion Failed」錯誤？

Question

我的代碼段

display('Descriptor Extraction...'); 

DESCRIPTORS = {}; 
descriptor_for_each_class = {}; 
num_classes = length(imgs_dir); 
IMAGES = {}; 
for i = 1:num_classes 
    class_name = classes{i}; 
    fprintf('Feature Extraction for CLASS %s\n',class_name); 
    full_path = fullfile(imgs_path,class_name); 

    class_dir = dir(full_path); 
    image_names = {class_dir(3:length(class_dir)).name}; 
    num_imgs = length(image_names); 

    descriptors = {}; 
    parfor j = 1:num_imgs 
     image_name = image_names{j}; 
     %fprintf('Feature Extraction for IMAGE %d/%d\n',j,num_imgs); 
     img_path = fullfile(full_path,image_name); 
     I = imread(img_path(:,:)); 
     I = standarizeImage(I); 
     I = rgb2gray(I) ; 
     IMAGES{i,j}.I = I; 
     IMAGES{i,j}.class_name = class_name; 
     IMAGES{i,j}.name = image_name; 
     [f, d] = vl_dsift(I, 'size', binSize) ; 
     descriptors{j}=d; 
    end 
    DESCRIPTORS = [DESCRIPTORS descriptors]; 
end 

當PARFOR部分完成的一個時代，在第二個時期的開始Matlab的給出了以下錯誤：

Error using parallel_function (line 589) 
Assertion failed. 

Error in feat_extraction (line 34) 
    parfor j = 1:num_imgs 

我不能上找到的bug代碼。有什麼想法嗎？

Answer 1

我解決了通過改變PARFOR部分如下

descriptors = {}; 
    images = {}; 
    parfor j = 1:num_imgs 
     image_name = image_names{j}; 
     %fprintf('Feature Extraction for IMAGE %d/%d\n',j,num_imgs); 
     img_path = fullfile(full_path,image_name); 
     I = imread(img_path(:,:)); 
     images{j}.I = I; 
     images{j}.class_name = class_name; 
     images{j}.image_name = image_name; 
     I = standarizeImage(I); 
     I = rgb2gray(I) ; 
     %IMAGES{i,j}.name = image_name; 
     [f, d] = vl_dsift(I, 'size', binSize) ; 
     descriptors{j}=d; 
    end 
    ALL_DATA{i}=images; 
    DESCRIPTORS = [DESCRIPTORS descriptors]; 
end