The previous tutorial was devoted to exploring various ways one could take a rough black line sketch made on a white background and automatically convert it into automatically filled solid colored regions. Which could also be vector colored regions if you wanted to do that.
Three different approaches to automatically do that were explained in detail in that tutorial. The Flat Region Colorizer ip op, the Vectorizer, or the Paint Synthesizer.
Of course one could also try to automatically generate the rough black line on white backing sketch itself using features available in the paint synthesizer. And again, there are many different ways you could approach trying to do this. So i thought i'd try out some different ones, and post the results here along with the presets i used to generate the final auto-colored regions generated from the fully automatic black line on white backing sketch.
Here's one quick example i threw together in a few minutes this afternoon below.
The V4 PASeq i used to automatically generate the rough sketch and it's auto-colorization is shown and attached below. It incorporates the Flat Color Regionize ip op technique as it's last action step to automatically fill in the individual regions defined by the rough sketch. You could of course use any of the 3 different approaches to ding this we described in detail in the previous tutorial post in this Group.
The sketch is generated based on 2 different basic concepts, working together to create the entire finished sketch. Based on the general ideas used when conceptualizing a rough sketch for a WPAP image. Generating global patterning while also incorporating local source image detail to work together to build up region structure with the complete sketch.
The AutoPaint action step shows one way to build up a stylized global patterning. It fracture the canvas using a set of 10 automatically drawn straight lines that radiate out from the center of the canvas at random angles.
And i used the same 1 pixel black hard edged paint preset i used to do my manual sketches in the previous tutorial. Except i custom programed the Path Start, Path Shape, and Path Angle control panels for that preset to automatically generate the global fracture stylistic patterning i was looking to achieve.
You can examine the control settings in those control panels in the paint synthesizer for that AutoPaint action step to see how i did that.
In addition to generating global region structure, i also wanted to add some sketch lines associated with the source images feature details. There are many different strategies you could use to try and do that.
I decided to build up a set of bezier paths to do it. Using several different techniques in combination to build up the complete set of feature paths. Using the bezier path layer to hold them as they are built up from different action steps in the PAseq.
You can see everything i used to do this in the PASeq shown above. And you can try the individual action steps out in Studio Artist by running the individual actions (press the red keyframe to run an individual action step), and look at the contents of the bezier path frame when in Bezier operation mode to see what that action step did.
Note that i first erase the bezier path layer, before i run commands to auto-generate paths. if i did not do that, then anything already inside of the current bezier path frame would contaminate my sketch.
I used 2 ip ops that can auto-generate bezier paths (Edge ip op, and Smart Contrast ip op). To use those to auto-generate bezier paths, you setup their controls in the image operation Editor control panel, and then run the Path : Generate Path : from Ip Op menu command.
If an ip op does not auto-generate bezier paths, that menu will be grayed out.
I used 2 different image operation effects to auto-generate bezier paths, as well as the Path : Generate Paths : From Source Edges menu command.
I also used various Path : Path Layer Commands menu commands to try and straighten out the bezier paths, and auto-connect ones that were close to each other, and also filter out really small paths.
After generating my feature sketch lines and storing them in the bezier path layer, i then used the Path : Paint Path : Full Layer menu command to automatically paint in the auto-generated bezier paths with my 1 pixel hard edges black paint preset.
A true WPAP style uses very straight lines for the sketch. So this part of my automatic sketch process is the weakest part of my attempt documented in the PASeq. If you are really trying to get a true WPAP look, the image feature sketch lines rom this approach are less than ideal. The global stylistic fracture patterning on the other hand i think matches the WPAP style quite nicely.
So i don't consider the finished output of this PASeq to really be representative of the WPAP style, but i thought the overall PASeq strategy it uses, and how it was put together would be useful information for people. Because it shows off a lot of different and useful techniques associated with bezier path layer manipulation you can use in your own work.
Another approach would be to use the paint synthesizer directly to build up a rough feature sketch using short straight line segments. I'll try to post an example of that kind of alternative approach later.