PIXEL VALUE NORMALIZATION 0 and 1

Dear Sir/Madam,

I have DICOM images taken from the angiography device and I labeled my images using Adobe Photoshop, then painted the background with black and the part I labeled with white.

I exported the labelled images in png format from photoshop.

However, the images appearing in black and white are in RGB format, although I converted the image to binary with the MATLAB program, all numbers appear as 2 in the pixel range.

How can I make 0 and 1 pixel interval for binary images ? I would be grateful if you can help me

Best regards

Şerife Kaba

[Matt J]

I suggest attaching the RGB image so that we can demonstrate.

[Serife Kaba]

Thank you so much . I attached the image below which taken from photoshop (RGB image )

Best regards

Answer 1

[Walter Roberson]

Although you posted a PNG image, we can tell that at some point the image had been saved in jpeg format, which has resulted in some boundary pixels being blurred.

IM47 = imread('IM-0001-0047.png');
BW47 = imbinarize(rgb2gray(IM47));

Now BW47 will be the binary labels that you need.

[Serife Kaba]

Dear Walter,

Thank you so much 🙏

Best regards

Answer 2

[yanqi liu]

yes，sir，may be the image file save be Photoshop get rgb format，so we read it to logical，such as 0 and 1 value

may be use

im2uint8(your_logical_label_matrix)

make the value to 255（white）、0（black）

and use

classNames = ["target","background"];

labelIDs = [255 0];

to generate pixelLabelDatastore

[Serife Kaba]

Thank you for your answer , i will check