利用MATLAB中的GUI（图形用户界面），实现图像的读取，边缘检测，四叉树分解，直方图阈值分割，二值化差值的实现，并设计了退出按钮。-In MATLAB GUI (graphical user interface), to achieve image reading, edge detection, quad-tree decomposition, histogram thresholding, binary difference implementations and designed th