Matplotlib图以图像作为一个numpy数组

Matplotlib图以图像作为一个numpy数组

为了获得图形内容作为RGB像素值，

matplotlib.backend_bases.Renderer

需要首先绘制画布的内容。您可以通过手动调用

canvas.draw()

：

from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvasfrom matplotlib.figure import Figurefig = Figure()canvas = FigureCanvas(fig)ax = fig.gca()ax.text(0.0,0.0,"Test", fontsize=45)ax.axis('off')canvas.draw()       # draw the canvas, cache the rendererimage = np.fromstring(canvas.tostring_rgb(), dtype='uint8')

有关matplotlib
API的更多信息，请参见此处。