* Improve picture clarity

[JasonLiuLiuLiuLiu]

Reference Issue

The output image loses a lot of details

source svg:

before fix (9k):

after fix (11k):

What does this implement/fix? Explain your changes.

https://docs.microsoft.com/en-us/dotnet/api/system.drawing.drawing2d.interpolationmode?view=dotnet-plat-ext-6.0

set InterpolationMode of Graphics as NearestNeighbor