آشنایی کامل با آموزش فعالسازی WDR در DVR هایک ویژن
ما در این مطلب سعی داریم تا شما را با نحوه فعال سازی WDR در DVR دوربین هایک ویژن آشنا کنیم؛ اما پیش از آن، بهتر است نگاهی اجمالی به WVR و کاربردش داشته باشیم سپس نحوه فعال سازی و تنظیمات آن را در DVR دوربین مدار بسته هایک ویژن توضیح دهیم. البته می توانید در این مقاله به طور کامل با قابلیت WDR آشنا شوید. بنابراین با ما همراه باشید تا آموزش فعالسازی WDR در DVR هایک ویژن را به طور کامل یاد بگیرید.
آشنایی با WDR
WDR یا دامنه دینامیکی فعال، بیانگر تفاوت روشنایی بین روشن ترین و تاریک ترین نقطه یک منطقه تحت نظارت است. به عنوان مثال اگر شخصی در روز روشن جلوی پنجره اتاقی بایستد، دوربین مدار بسته داخل اتاق، چهره فرد را تاریک نشان خواهد داد، زیرا تفاوت بین نور بیرون و نور منعکس شده از صورت فرد، بسیار زیاد است. بنابراین برای حل این مشکل از قابلیت WDR در دوربین های مدار بسته استفاده می گردد. به وسیله این قابلیت، دوربین شما نور را متعادل کرده و تصویری واضح، از قسمت های تاریک منطقه نشان خواهد داد.
حال سوال این است که آموزش فعالسازی WDR در DVR هایک ویژن چگونه است؟ شما چگونه می توانید WDR این دوربین را تست کنید؟
آموزش فعالسازی WDR در DVR هایک ویژن
در دوربین های هایک ویژن، WDR، برای وضعیت نور پس زمینه که از روشنایی زیاد و اجسام تاریک در همان صحنه تشکیل شده طراحی شده است. دوربین های دارای فناوری WDR دارای سنسورهای پیشرفته ای هستند که می توانند طیف وسیعی از نور را تولید کرده و به آن ها امکان ضبط در عمق نور بالاتر را می دهند.
از نظر فنی، دوربین IP چندین عکس از صحنه را در سطوح مختلف نوردهی ضبط می کند. این موجب ایجاد تصاویر یکسان با نوردهی بالا و نوردهی کمتر می شود که دوربین آن ها را ترکیب کرده و تصویر واضحی را به عنوان خروجی، تولید می کند.
زمان فعال سازی WDR در دوربین هایک ویژن
روشن کردن WDR ممکن است باعث سفیدی تصویر شود و اگر به دنبال یک تصویر رنگارنگ تر هستید، بهتر است WDR را فعال نکنید. همچنین روشن کردن WDR موجب افزایش نویز تصویر در طول شب می گردد. به عبارت دیگر، WDR فقط در روز روشن یا در صورت روشن بودن صحنه تحت سایه سنگین باید فعال شود. این بدین معنی است که WDR را فقط در نور و سایه شدید باید به کار ببرید.
نحوه روشن کردن WDR در دوربین IP هایک ویژن
در دوربین های IP هایک ویژن، WDR به طور پیش فرض خاموش است و برای روشن کردن آن، باید از طریق مرورگر وب IE به دوربین دسترسی پیدا کنید و سپس این مسیر را طی کنید:
Configuration > Image > Display Settings > Backlight Settings
شما از آنجا می توانید گزینه ON یا Enable را انتخاب کنید. معمولاً دوربین با تنظیمات جدید دوباره راه اندازی شده و به حالت عادی باز می گردد.
توجه: اگر از NVR دوربین هایک ویژن دارای PoE استفاده می کنید شما می توانید با استفاده از ویژگی میزبان مجازی به راحتی دوربین را مستقیماً ارزیابی کنید.
از سوئیچ داخلی OSD در پیگتیل دوربین استفاده کنید. به منوی اصلی بروید، سپس حالت Exposure Mode را روی حالت WDR قرار دهید و برای بازگشت به پنل قبلی بر روی Return کلیک کنید. فراموش نکنید که با کلیک روی دکمه ذخیره و خروج از منو خارج شوید. در غیر این صورت، تنظیمات ذخیره نمی شوند و شما باید مراحل را دوباره انجام دهید.
پس از اعمال تنظیمات، تصویر چند بار پدیدار و محو می شود تا اینکه تثبیت شود. بهتر است کمی تنظیمات را تغییر بدهید تا زمانی که پارامترهای مناسب محیط خود را بدست آورید. در همان زمان، باید کیفیت تصویر را در طول شب بررسی کنید. یک WDR فعال ممکن است نویز به تصویر اضافه کند به خصوص اگر محیط خیلی تاریک شود.
نحوه تنظیم DVR برای عملکرد WDR
ابتدا به بخش configuration یا همان پیکربندی انتخاب تصویر در زیر گروه پیکربندی اصلی (basic configuration) بروید. در اینجا انواع تنظیمات از جمله wdr را پیدا خواهید کرد.
در قسمت wdr، زبانه را باز کرده و گزینه Auto را انتخاب کنید تا WDR به صورت خودکار تنظیم شود. اکنون دوربین شما بسته به قدرت نور، wdr را به طور خودکار روشن یا خاموش می کند. توجه داشته باشید که یک نوار لغزنده برای تنظیم سطح wdr وجود دارد.
سطح پویای گسترده (Wide Dynamic Level) یکی از عناصر اصلی در تنظیمات wdr است و یک منطقه با تضاد سایه و روشن شدید، کار روی آن را آسانتر می کند. در اینجا می بینیم که وقتی Wide Dynamic Level در ۱۰۰ به حداکثر می رسد، سطح دینامیکی سفید به بالاترین حد ممکن رسیده، تصویر بسیار واضح می شود.
تست WDR در آموزش فعالسازی WDR در DVR هایک ویژن
مهم ترین مطلب در تنظیم WDR هایک ویژن تنظیم سطح دامنه پویا است. هایک ویژن یک اسلایدر بین ۱ تا ۱۰۰ را با عدد ۱ که کمترین WDR و ۱۰۰ که بیشترین است را ارائه می دهد. در حالی که عدد ۱۰۰ قوی ترین دامنه دینامیکی را ارائه می دهد، میزان نویز را به طور متوسط افزایش می دهد و می تواند عملکرد نور کم را کاهش دهد. با این حال، هنگامی که سطح WDR هایک ویژن به ۱۰۰ افزایش می یابد، عملکرد آن به طور قابل توجهی افزایش می یابد و اکنون برابر یا بهتر از دوربین های دیگر عمل می کند:
مقایسه بعدی تنظیمات WDR هایک ویژن را در را در سطح نور نسبتاً کم ۲۰ لوکس نشان می دهد. در این سطح، تنظیمات روی ۱۰۰(تصویر سمت راست)، به طور قابل توجهی نور جزئیات تصویر / تصویر را کاهش می دهد:
با این حال، در صحنه بالا، هایک ویژن پس از حدود ۵ ثانیه به طور خودکار WDR را در تنظیم ۱۰۰ خاموش می کند (تصویر سمت چپ). پس با تنظیم WDR در هایک ویژن به حالت Auto دیگر نگرانی بابت کدری تصویر در روشنایی کم و ایجاد نویز در اثر سطح ۱۰۰ WDR در شب نخواهید داشت. ما اعتقاد داریم رویکرد Hikvision در خاموش کردن خودکار WDR منطقی است و چیزی است که در کمتر دوربین مدار بسته ای می توانید مشاهده کنید.
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