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تبلور هنر.. - مبانی سواد بصری و ترکیب بندی، حرکت و خطای دید
تبلور هنر..

مبانی سواد بصری و ترکیب بندی، حرکت و خطای دید

شنبه 9 آذر 1392

نوع مطلب :مبانی هنر های تجسمی، 




حرکت:
هر ماده ای در ذات خویش در حرکت و تکاپوست و هر موجودی در طبیعت، از تحرک درونی برخوردار است.حرکت در یک تصویر، ممکن است با نقطه و یا خط ایجاد گردد و به شکل های مختلفی مطرح شود. شکل حرکت ممکن است به صورت مارپیچ، مدور، زیکزاک و راست باشد.




جهت حرکت نیز ممکن است بالا، چپ، راست و... باشد. هر عنصر تصویری یا هر شکلی، ممکن است انرژی حرکت را کم و بیش داشته باشد.
مثلا در شکل مثلث انرژی حرکت به جانب گوشه ها و زوایای آن در جریان است، در لوزی به جانب قطرهای کوچک وبزرگ .
هر سطحی با توجه به برتری یک جهت آن، انرژی حرکتی را به جانب همان جهت نشان می دهد و تحت تاثیر کشش های وارده از جهت های مختلف، به سمتی که طول بیشتری دارد حرکت می کند.


مفهوم حرکت را به صورت های دیگری می توان ادراک نمود، از جمله در اثر تکرار یک عنصر بصری، که این کار بوسیله تکرار عناصر زیادی امکان پذیر است.
مثلا حرکت یک دایره در صفحه بوسیله تکرار مداوم که باعث بوجود آمدن نوعی ریتم نیز می گردد.




عنصر بصری حرکت، مانند بعد سوم و بافت بصری بیشتر به صورت کاذب در سطح دو بعدی طراحی یا بوسیله دوربین ثبت می گردد.
در نقاشی جزییات بسیار ریز روی یک سطح، این توهم را بوجود می آورد که صفحه ی کاغذ دارای آن بافت است و با استفاده از فن سایه روشن و پرسپکتیو توهم برجسته بودن تصویر بوجود می آید. اما ایجاد توهم حرکت در یک شکل ثابت و بی حرکت به مراتب دشوار تر است. بعد از اختراع فن فیلمبرداری ایجاد توهم حرکت با تصاویر به اوج خود رسید.



بهتر است بدانیم که حرکت تصاویر در فیلم نیز واقعی نیست و نوعی خطای باصره است به آن اصطلاحا تدوام در رویت می گویند. یک رشته تصاویر ثابت (۲۴ فریم در ثانیه) با چنان سرعتی عوض می شوند که قبل از آنکه تاثیر تصویر قبلی از سلسله اعصاب بینایی محو شود تصویر دیگر ظاهر می شود. در نتیجه تصاویر در هم آمیخته به نظر می رسد.


(Persistence of vision) یا خطای رویت
گاهی در یک کمپوزیسیون یا ترکیب بندی ممکن است به علت ریتم (تکرار یک عنصر) یا آهنگ موجود در آن، حالت حرکت را القا کند.


تکرار یک عنصر در نقاشی یا عکس حالت حرکت را در دید انسان القاء می کند این حس را می توان با کشیدگی تصویر یا استفاده از سرعت شاتر پایین برای ثبت حرکت در عکاسی نیز القا کرد.


توجه داشته باشیم که تمامی عناصر یاد شده در یک ترکیب بندی موفق حتما در جای خود در جهت ایجاد یک حس بصری به کار می روند تا تاثیر گذار باشند.
در قسمت بعد ترکیب این عناصر در کادر را بررسی می کنیم.


http://persiangfx.com





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