![]() ![]() You never learn how to draw, you just draw, and wait for great effects. It may seem like a good thing, but I discovered that drawing talent is often an obstacle to your progress. The truth is that talent will never give any skill to you-it will only make the basics obvious. However, when talking about talent we usually imagine a person creating masterpieces just like this, without any effort. It lets you do the things you have never learned consciously-they just seem to turn out on their own. draw it, constantly comparing every line to your expectation. Just like a text you try to read in your dream, the image changes each time you try to focus on it. You have some image in your mind, but you can't take lines from it, because you don't really see it. The other one is used when you draw from imagination. And that's the easy way to get a recognizable picture, but it's the way to draw only things that you've already seen. The first one is used commonly as tracing, or when we use a reference. We use both ways when learning how to draw. There are many recognizable outcomes, and the more skilled you are, the closer it is to the result of the first type. The other one is a kind of reverse of it: you draw any lines and wait for your mind to lead you to a recognizable outcome. There are no arbitrary edges, but the more of them you include, the more realistic the outcome. The first consists of the edges derived from a still frame of reality. We don't need to carefully trace edges from a photo to depict an object-we can draw lines randomly until our mind recognizes them as something. We are very skilled in terms of recognizing patterns and symbols, even when they're quite far from reality. ![]() ![]() They can even be used without any parent-you can use them to depict something you have never seen.Īpparently, our minds don't need much to recognize reality. But once we separate the edges from their "parents", the lines become something on their own. Drawing is based on lines, and lines symbolize the edges of objects we observe. Of course, it will be still a painting of a picture, not of reality. If you use only a still snapshot of it, a single frame, you can try to re-create it with colors of various brightness and saturation, simulating the light and shadow of the image. It's too complex, even if we took only the visual side of it into consideration. What Are Lines and Where Do They Come From? Two Ways of Drawing If you keep reading without doing that, you won't learn anything. If something seems confusing, stop for a while, re-read it, and try it in practice. One last thing before we start: I want you to really, really focus when reading this article. I'll show you a way of thinking you need to use to fully control the lines to create them from imagination and still make them more realistic than the traced ones. Now it's time to take your skill into your own hands. You're forced to draw your creatures, no matter how beautifully imagined, in one obvious pose, with a shading that doesn't make it any less flat. Until you understand it, you're forced to draw flatly, using lines as something natural and constant. Wrapping, the lines, is an approximation of reality, and, as it is with approximations, there may be many of them describing the same thing. It's us who pack the real objects into tight-fitting wrapping, because wrapping is all we can draw. Lines seem to be almost interchangeable with drawing, but if you look carefully, you won't find them anywhere in the real world. When we grow up, we learn more about the world around us, and we learn how to depict it more accurately with lines. Even young children know how to transfer the image in their head into a set of pencil strokes, even though they may not resemble anything to others. Thresh = cv2.threshold(gray, 110 ,255, cv2.THRESH_BINARY_INV)Ĭnts = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)Ĭnts = cnts if len(cnts) = 2 else cntsĬv2.Drawing, at its most basic level, is intuitive to us. Gray = cv2.cvtColor(blur, cv2.COLOR_BGR2GRAY) After making these changes, here's the result One is to use cv2.RETR_EXTERNAL instead of cv2.RETR_TREE and the 2nd is to filter out small contours by their area using cv2.contourArea(). Your question was how to remove the small contours inside. Notice in this image, the small contours inside the pen and unwanted contours in the paper were detected. Iterate through contours and filter using a minimum contour area.Convert image to grayscale and blur image.Here's a potential approach to obtaining the contours
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