(Thus my comment about the line drawn with a 1-pixel raster image.) Such a graphic would be entirely vector, but to absolutely no advantage regarding scaleability. The resolution-independence reason for preferring vector paths would be rendered moot. And the "vector advantage" of that would be absolutely nill. What's going to be the most accurate autotracing of a raster image? The mathematically "most accurate" result would be a perfect vector square for each and every pixel in the image. Imagine turning the sensitivity of such an algorithm way up to the max. Again, it just tries to follow around the regions of similarly-colored pixels.īut that sounds okay, right? Well think about it. Similarly, in the case of a geometric logo that obvously (to a human) is supposed to contain a perfect circle, the autotrace feature doesn't "see a circle" it doesn't go and get the Ellipse tool and draw a circle that fits, as any human would do. For example, in the case of a human face, the autotrace feature doesn't know that the eyes' pupils are round it just detects a region of similarly-colored pixels and tries to draw a path around them. The kind of autotrace algorithms in Illustrator and programs like it have no shape-recognition intelligence. It's very much a garbage-in-garbage-out process.Īnd even when the "in" is not garbage, there is no real intelligence involved. All that most current autotrace features (including the one in Illustrator) do is detect color differences between pixels of a raster image based upon a user-specified sensitivity setting, and then try to draw vector paths which follow along those detected differences. You can use the autotrace feature which exists in Illustrator or any similar program to try to automate the process of "tracing" the raster image with vector paths.Įither way, you end up with what would more accurately be called a "reinterpretation" of the subject, not a "conversion" of the raster image in the sense of "converting" one file format to another.Īnd that's the key. Or (and this is where the all-too-common misconception about "conversion" comes in). You can even import the raster image and use it as a guide while "tracing" it with vector paths. You can re-draw the artwork using the vector drawing tools in Illustrator or any similar program. The artwork represented by a raster image can be redrawn as vector artwork. There is no automagic "conversion" from a raster image to a vector graphic. It must be difficult to convert from illustrator into a vector format since no one has a specific answer.
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