This MATLAB code is used to remove the background from an image without using any built-in functions. The code performs the following steps:
- Reads an image file and loads it into the variable img.
- Converts the image to grayscale using the rgb2gray function. This is because the thresholding operation is performed on a grayscale image, as it represents the intensity values of each pixel.
- Uses global thresholding to convert the grayscale image to a binary image. The graythresh function is used to determine the optimal threshold value for the image. The im2bw function is then used to convert the grayscale image to a binary image.
- Invert the binary image
- Multiply the binary image with the original image using repmat function to remove the background. This step sets the pixels corresponding to the background in the original image to 0.
- Display the image using the imshow function.
This is a basic method to remove background, it may not work well with images that have complex backgrounds or have variations in intensity. You can use other methods like color-based or contour-based methods to improve the accuracy of removing background.
引用格式
MUHAMMAD BILAL WARIS (2024). Background remove from Image (https://www.mathworks.com/matlabcentral/fileexchange/123950-background-remove-from-image), MATLAB Central File Exchange. 检索来源 .
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