On 4/16/24 22:38, Waldek Hebisch wrote:

Just a silly question: have you looked why the image is so big?
Your new image is 6.7M and bigger than scanned version (4.3M).
Old knot3.ps is 77k lines giving 1.1M size.  At first glance
adding color to this could double or maybe triple the size.
.pdf uses compression, compressed knot3.ps is 153k.  So
I would expect .pdf of order 0.5M.


Update on image size:

The 3D "smooth" style is pixel-for-pixel bitmap.
So for colored knot3 image (400x400):
ps is 2.1MB
xpm is 320KB
pdf is 208KB (converted from ps)
png is 28KB (converted from xpm)


The only difference/advantage of PS format is that it has
vector font (for x/y/z, title, etc).

So if the image have no axes and no title, just colored pixels,
we can use png format.

- Qian

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