DPI metadata of PNG export should change with scale or be adjustable

I export a figure as a png using write_image:

  fig.update_layout(width=300).write_image("test_1.png", scale=1)

Opening this image in another program, the width of the image is 3.125 inches corresponding to a DPI of 96.

If I instead export an image with a different scale, e.g. 2
fig.write_image("test_2.png", scale=2)
I get a png file with a scaled pixel width (e.g. 600).
But opening the image in another program, the width in inches is also doubled to 6.25.

The ideal behavior IMO would be that the width of the image in inches is unaffected by the scale parameter or having a dpi keyword argument that sets the DPI metadata directly.
A workaround (which others might find useful) is to use Pillow to fix the DPI metadata

  from PIL import Image
  scale = 2
  Image.open("test_2.png").save("test_2_fixed.png", dpi=(96 * scale, 96 * scale))

such that the image defaults to the same size in inches in other programs independent of the scale.

从 Python 的 write_image 导出路径开始，比较使用 scale=1 和 scale=2 生成的 PNG 元数据。在另一个图像程序中验证所得的物理尺寸；当缩放像素不再改变物理尺寸，或 dpi 选项能够提供所需的元数据控制时，即表示完成。