import numpy as np import matplotlib.pyplot as plt # 押した時 def Press(event): global x1,y1,DragFlag # 値がNoneなら終了 if (event.xdata is None) or (event.ydata is None): return # 丸める cx = int(round(event.xdata)) cy = int(round(event.ydata)) x1 = cx y1 = cy # フラグをたてる DragFlag = True # ドラッグした時 def Drag(event): global x1,y1,x2,y2,DragFlag # ドラッグしていなければ終了 if DragFlag == False: return # 値がNoneなら終了 if (event.xd
![matplotlibだけで画像からマウスで指定した領域を抜き出す - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/a74cadf5eb5bf998f2a334fa16cf60d7e2a61d69/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9bWF0cGxvdGxpYiVFMyU4MSVBMCVFMyU4MSU5MSVFMyU4MSVBNyVFNyU5NCVCQiVFNSU4MyU4RiVFMyU4MSU4QiVFMyU4MiU4OSVFMyU4MyU5RSVFMyU4MiVBNiVFMyU4MiVCOSVFMyU4MSVBNyVFNiU4QyU4NyVFNSVBRSU5QSVFMyU4MSU5NyVFMyU4MSU5RiVFOSVBMCU5OCVFNSU5RiU5RiVFMyU4MiU5MiVFNiU4QSU5QyVFMyU4MSU4RCVFNSU4NyVCQSVFMyU4MSU5OSZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnM9OGIxMGE0Zjc5YjVkZTg4OTkyZDk4MDljYjlkMmQ1NzQ%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBjZXB0cmVlJnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9MzYmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz1hNWY0MjQ2NGUzNjk5MDQ1OTM5NjRjYTFlZDQ5ODE2YQ%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3D5c6366b369e526935a6dc002f2855441)