如果其他人遇到同樣的問題,我發佈解決我的問題的代碼。實際上,我遵循cxw的建議,併爲真實和輪廓圖片擬合了一個橢圓,然後根據輪廓 - 橢圓的長軸與實際橢圓長軸的比例調整了實際圖片的大小。這使得圖像對象的尺寸與輪廓圖像對象(即海狸)相匹配。然後我裁剪或添加邊框像素以匹配我需要的分辨率(即319x319)。
% fetching the images
realList = getAllFiles('./real_images'); % getAllFiles => StackOverflow function
silhList = getAllFiles('./silhouettes');
for qq = 1:numel(realList)
% Name of the file to save
str = realList{qq}(15:end);
a = imread(realList{qq}); % assign real image
background_Ra = a(1,1,1); % getting the background colors
background_Ga = a(1,1,2);
background_Ba = a(1,1,3);
% finding the points (x,y) to pass to fit_ellipse
[x1,y1]=find(a(:,:,1)~=background_Ra | a(:,:,2)~=background_Ga | a(:,:,3)~=background_Ba);
% fitting an ellipse to these points
z1 = fit_ellipse(x1,y1); % Mathworks file exchange function
b = imread(silhList{qq}); % assign silhouette image
background_R2b = b(1,1,1); % getting the background colors
background_G2b = b(1,1,2);
background_B2b = b(1,1,3);
% finding the points (x,y) to pass to fit_ellipse
[x2,y2]=find(b(:,:,1)~=background_R2b & b(:,:,2)~=background_G2b & b(:,:,3)~=background_B2b);
% fitting an ellipse to these points
z2 = fit_ellipse(x2,y2);
% ratio of silhouette's ellipse major axis to real image's ellipse
% major axis
ellaxratio = z2.long_axis/z1.long_axis;
% resizing based on ellaxratio, so that the real image object size will
% now fit the silhouette's image object size
c = imresize(a,ellaxratio); c = rgb2gray(c);
bordercolor = c(end,end);
% if the resulting image is smaller, add pixels around it until they
% match with the silhouette image resolution
if size(c) < 319
while size(c) < 319
% 'addborder' is a Mathworks file exchange function
c = addborder(c(:,:,1),1, bordercolor ,'outer');
end
% if the resulting image is larger, crop pixels until they match
else size(c) > 319
while size(c) > 319
c = c(2:end-1,2:end-1);
end
end
% in a few cases, the resulting resolution is 318x318, instead of
% 319x319, so a small adjustment won't hurt.
if size(c) ~= 319
c = imresize(c,[319 319]);
end
% saving..
imwrite(c,['./good_fits/' str '.bmp'])
end
您是否總是擁有像真實圖像或輪廓之外的問題中展現的平色背景? – cxw
yes對於真實圖像和剪影都是平坦的顏色背景 – yannovios