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converting grey of three bands text image into into binary image into 1 band

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Majid Al-Sirafi
Majid Al-Sirafi 2019 年 2 月 9 日
コメント済み: Image Analyst 2019 年 2 月 9 日
Hi everyone
Suppose that I have the attached text image. How can I convert it into binary image (0,1) with acceptable viewing?
Regard;
Majid

回答 (1 件)

KALYAN ACHARJYA
KALYAN ACHARJYA 2019 年 2 月 9 日
編集済み: KALYAN ACHARJYA 2019 年 2 月 9 日
grey of three bands
More clarification needed, but the question seems easy, if I undestood it properly. As RGB have three bands (Levels) and Gray has one level only (with qualtizations levels).
image1=imread('image.bmp');
gray_im=rgb2gray(image1);
image_bw=im2bw(gray_im,0.65); %0<threshold_value<1
imshow(image_bw);
Above mentioned is direct conversion to binary image. For improve the image quality, you can do it in number of ways, like local thresholding, global thresholding, you can use the Otshu's thresholding also. All depends on targeted applications.
Please refer the chapter of Image Segmentation, Book Digital Image Processing using Matlab Author: Golzalez (McGraw Hill), you will get numerous solution.
  4 件のコメント
Image Analyst
Image Analyst 2019 年 2 月 9 日
Use a higher resolution input device (scanner or camera).

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