PNG Images as texture with original quality is possible?

The PNG images used as texture are not rendering correct output. is there a way to improve quality?
I am using = THREE.LinearFilter but still issue. and also I have issue with the same when I load my canvas on mobile. Please help me to keep the original PNG quality.

Using the default THREE.LinearMipMapLinearFilter should produce a better texture quality since mipmapping is used in this case. Is there a special reason for using THREE.LinearFilter?