1. Open your picture in Photo Editor. To do that from within the program, click the second icon in the toolbar or press the key combination Ctrl + O on your keyboard. To open it directly from Explorer, hold the Shift key, right-click the name of the image file and click Open With. Go to Choose Programs, look for Photo Editor and select it, then press OK.
2. To optimize your photo for the next steps, you can use the predefined Photo Editor function called AutoBalance. For that, go to Menu > Image > AutoBalance.(Fig. 1)
3. Right-click the image and click Properties. In the Properties window, change the type of the picture to Gray Scale (8 bit) and click OK. Your photo will be converted to black and white mode.(Fig. 2)
4. Go back to the Properties window and change the type to True Color (24 bit). Click OK. (Fig. 3)