1-) With the Gyazo, we take a picture of the model, in the frame.
2-) We save the picture we took on your computer by saying save as
3-) By clearing the background of the picture with Photoshop, we get a pure image of the model.
4-) We place the images with the background removed on a new layer and save them as png to the computer.
I did not add the relevant video, because by searching in your language, you can find more efficient videos. There are lots of videos on YouTube on these topics. You can Decupe your pictures in photoshop by finding many videos on the topics you need to search, Photoshop, Decupe, Pen Tool, Magic Wand tool, Lasso Tool, Background cleaning with these topics.