What is Picture to People ?
"Picture to People" (P2P) is a huge Computer Graphics project. It was started to create new softwares able to make 2D drawing, 3D rendering, vexel drawing, text effects, photo effects, image filtering and other complex Computer Graphics operations. It has been made from scratch, including its low level Computer Graphics libraries like Maccala. Nowadays, most final features produced for this project are released as free online tools available from its official website. This blog talks about Computer Graphics, mainly concerning Picture to People development.
Saturday, October 22, 2016
After this development, it became possible to create colorful sketches from photos in a few seconds. Each final drawing is made of thousands or even millions of individual strokes. Each stroke is chosen based on local image properties and not set randomly.
To offer more stylized options, some color sketch styles have an interesting mix of colored and gray strokes. Besides, there is a special algorithm that takes care of drawing relevant contours.
I inserted in such algorithms the possibility to use the "smart strokes" technology. Based on the results from my test images, it seemed the right thing to do. Now I know it's a "dangerous" options for colorful images, because it can cause an unwelcome oversaturation in many cases. Anyway, you always have the option of disabling this feature.
Despite at that time my researches about non-realistic image rendering were just beginning, for sure this photo to color sketch effect was an important advance. Its development gave me new knowledge and insights to keep creating new algorithms. Besides, usually you don't see good quality procedural colored photo sketch effects out there. They usually just cheat using layer blending with textures, but it can generate poor results because of the low coherence with the line and color flow from original photo.
Now you see a sample of colorful sketch effect created online by using the Color Sketch Photo Editor.
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Monday, October 10, 2016
In my opinion, at that time it brought several innovative and advanced features, and some of them are amazing until current days, as for example:
- you can produce fast wild sketches or smart clean drawings from your photos by using the same photo app;
- each drawing is made of thousands of unique pencil strokes drawn individually and selected based on information extracted from the input photo. In other words, it's a really procedural sketch effect, and each image produces a different drawing. It's not a pseudo-effect always based on the same texture or pattern;
- you can choose between drawing styles with thick strokes or delicate small strokes;
- the designed sketch effects really look like drawings made by human hands.
Despite the cool features just cited, it's also worthy to mention that you can choose the paper and pencil color, what can be very useful in many situations. You can even use a feature I invented that time called "smart strokes" that can, in many cases, design an improved drawing.
Below I show you a photo and a sketch effect designed by using our first Photo Sketch Creator.
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