Convert black and white image

Quick answer：

Converting a black and white image involves transforming a color image to a monochromatic version where only shades of gray are present. This can be done using various image editing software or programming libraries that support image processing. The process often involves reducing the image's color channels to a single grayscale channel. Common software for this task includes Adobe Photoshop, GIMP, and online tools like Convertio or Smallpdf. Programming languages like Python with libraries such as OpenCV or PIL can also be used to convert images programmatically.