Drawing Lines In Opencv

Drawing Lines In Opencv : C opencv how to detect lines of a specific colour

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Wire Sculpture Line Drawing Exercise: This is an excellent activity for middle school students and for high school students, if it relates specifically to your project (and does not interfere with postage requirements, for those who need to post work away for assessment). Small wire experiments, using light-weight wire, can also be mounted to sketchbook pages.

Here is a collection of line drawings from famous and less well known artists, to inspire high school Art students and teachers. This section is continually updated. Enjoy!

When we first picked up a pen or pencil and started making marks on paper, we began with line. Whether self-taught, through trial and error, or guided by others, we learned how line defines form, creates structure, divides a frame, traces contour, creates tonal variation (cross-hatching, for example) and leads the eye from one part of a work to another. Initially a mechanism for getting outlines onto paper – identifying edges – we begin to applaud lines for their own merit: celebrate their presence…whether a quiet flick of charcoal on paper or a streak of graphite.

The angle that these techniques are applied may remain constant within a drawing, or it may change in response to the angle and direction of the forms. For example, cross-hatching may flow around the surface of an object in a similar direction as cross contour lines. These techniques are also a great way to create the illusion of texture (see our article about observational drawings).