Three.js Image Text blur after Version 151

Questions
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1

I have an image with black text. In 151 and the previouse version, the text is black. After version 151, from 152, the text color became less black(blur, less sharp). The settings of WebGLRenderer, Texture and Material are the same.

Before 151 and previous

After 151（152 and later）

Check the release change, have no idea

Is there anything I should pay attention to?

Another question
How to make the text on the image as clear as when opened in Windows Picture Viewer?
The text is clear on the viewer and the anti-aliasing effect is good.

try following code, does not work
const renderer = new THREE.WebGLRenderer({
antialias: true, // 启用抗锯齿
});
texture.anisotropy = renderer.capabilities.getMaxAnisotropy();

Thanks for all the suggestions.

2

Find the answer of second question.
After i set PixelRatio, the text is more clear now.
renderer.setPixelRatio(Math.max(window.devicePixelRatio, 2)); // Use 2 as the minimum value