Output argument (and possibly others) not assigned
Output argument (and possibly others) not assigned a value in the execution with function I have a function script as follows: function [h]=getColorHist(im, color_table, opt) im = rgb2hsv(im); [ht,wid,~]=size(im); if opt == 'euc' % euclidean distance D = pdist2(color_table, reshape(im, [ht*wid, 3])); end end I call this function from a different script HW3.m from the command line and get the following error: HW3 Output argument "h" (and possibly others) not assigned a value in the execution with "getColorHist" function. Error in HW3 (line 23) f_hist(f_cnt, :) = getColorHist(hsv_im, color_table,'euc') where HW3.m is: im_path='/MATLAB Drive/Published/NWPU-RESISC45_1'; ids = {'airplane', 'airport', 'baseball_diamond', 'baseball_court', 'beach','bridge','chaparral', 'church', 'circular_farmland', 'cloud','commercial_area','dense_residental', 'desert', 'forest', 'freeway'}; kColor = 64; color_table = getHSVColorTable_2(im_path, ids, kColor); nClass = length(ids); nImg = 40; f_hist = zeros(nImg*nClass, kColor); labels = zeros(nImg*nClass, 1); f_cnt = 0; for k=1:nClass % list of files class_path = sprintf('%s/%s', im_path, ids{k}); f_list = dir(sprintf('%s/*.jpg', class_path)); offs = randperm(length(f_list)); % load random 256 pixels from each images if isempty(offs) == 0 for j=1:nImg f_cnt = f_cnt + 1; % read in a random image from the class im = imread(sprintf('%s/%s', class_path, f_list(offs(j)).name)); hsv_im = rgb2hsv(im); f_hist(f_cnt, :) = getColorHist(hsv_im, color_table,'euc'); labels(f_cnt) = k; % plot if (1) figure(3); subplot(nClass, nImg, f_cnt); plot(f_hist(f_cnt, :)); grid on; end end end end Can anyone check whether my code has any errors to let this problem occur? This is mind-boggling to me, appreciate any help! Here this the script for function getHSVColorTable_2 in HW3.m: function [color_table]=getHSVColorTable_2(im_path, ids, kColor) dbg=1; if dbg im_path='/MATLAB Drive/Published/NWPU-RESISC45_1'; ids = {'airplane', 'airport', 'baseball_diamond', 'baseball_court', 'beach','bridge','chaparral', 'church', 'circular_farmland', 'cloud','commercial_area','dense_residental', 'desert', 'forest', 'freeway'}; kColor = 64; end nClass = length(ids); nImg = 40; nPixelPerImage = 256; % sample images from the repository to train a global HSV color table % training pixels x = zeros(nImg*nPixelPerImage*nClass, 3); cnt = 0; for k=1:nClass % list of files class_path = sprintf('%s/%s', im_path, ids{k}); f_list = dir(sprintf('%s/*.jpg', class_path)); offs = randperm(length(f_list)); % load random 256 pixels from each images if isempty(offs) == 0 for j=1:nImg % read in a random image from the class im = imread(sprintf('%s/%s', class_path, f_list(offs(j)).name)); hsv_im = rgb2hsv(im); [ht,wid,~] = size(im); hsv_im = reshape(hsv_im, [ht*wid, 3]); pix_offs = randperm(ht*wid); x(cnt+1:cnt+nPixelPerImage, :) = hsv_im(pix_offs(1:nPixelPerImage), :); cnt = cnt + nPixelPerImage; end % plot if dbg figure(1); subplot(1, nClass, k); subplot(1, nClass, k); imshow(im); title(ids{k}); end end end
Prashant Kumar answered .
2025-12-26
The error is simple. In the given function:
function [h]=getColorHist(im, color_table, opt)
im = rgb2hsv(im);
[ht,wid,~]=size(im);
if opt == 'euc' % euclidean distance
D = pdist2(color_table, reshape(im, [ht*wid, 3]));
end
end
function D=getColorHist(im, color_table, opt)
im = rgb2hsv(im);
[ht,wid,~]=size(im);
if opt == 'euc' % euclidean distance
D = pdist2(color_table, reshape(im, [ht*wid, 3]));
end
end