character segmentation

Question

Ashish 2011-4-25

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/6196-character-segmentation

评论： ezhil K 2019-2-10

hi, i have obtained this code from a website,for character segmentation, i am unable to understand a particular line in this code , could any body explain me...

code:-

clear all;
close all;
I = imread('plate.jpg');
BW = im2bw(I, 0.9);
BW = ~BW;
stats = regionprops(BW);
for index=1:length(stats)
if stats(index).Area > 200 && stats(index).BoundingBox(3)*stats(index).BoundingBox(4) < 30000
      x = ceil(stats(index).BoundingBox(1))
      y= ceil(stats(index).BoundingBox(2))
      widthX = floor(stats(index).BoundingBox(3)-1)
      widthY = floor(stats(index).BoundingBox(4)-1)
      subimage(index) = {BW(y:y+widthY,x:x+widthX,:)}; 
      figure, imshow(subimage{index})
      end
  end

what does this line do:

if stats(index).Area > 200 && stats(index).BoundingBox(3)*stats(index).BoundingBox(4) < 30000

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Answer 1

Walter Roberson 2011-4-25

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/6196-character-segmentation#answer_8595

See http://www.mathworks.com/help/toolbox/images/ref/regionprops.html#bqkf8hf

For a 2 dimensional image, BoundingBox(3) will be the x width and BoundingBox(4) will be the y width of the bounding box.

The Area is the actual number of pixels in the region; the product of the widths is the number of pixels that are within the bounding box.

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vinod ch 2014-3-2

编辑：vinod ch 2014-3-2

what does the boundingBox contains can you explain it briefly about this code... i mean how it was able to detect exactly it is the character and on what parameters it separated them. can you explain me

ezhil K 2019-2-10