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

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Majid Al-Sirafi
Majid Al-Sirafi le 9 Fév 2019
Commenté : Image Analyst le 9 Fév 2019
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

Réponses (1)

KALYAN ACHARJYA
KALYAN ACHARJYA le 9 Fév 2019
Modifié(e) : KALYAN ACHARJYA le 9 Fév 2019
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 commentaires
Majid Al-Sirafi
Majid Al-Sirafi le 9 Fév 2019
sorry dear my image is 3 bands but suppose that its dimension is (100*100). so, if it converted into binary it viewing will be very poor. how can I enhance it
Image Analyst
Image Analyst le 9 Fév 2019
Use a higher resolution input device (scanner or camera).

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