قاب عکس دیجیتال

از ویکی‌پدیا، دانشنامهٔ آزاد
پرش به ناوبری پرش به جستجو
فارسیEnglish
قاب عکس دیجیتال
(نمایش تصویر آهو)
نوعی قاب عکس دیجیتال

با توجه به رواج دوربین‌های دیجیتالی، چاپ و نگهداری حجم عظیم تصاویر به ثبت رسیده، به‌صرفه نبوده و حبس آن‌ها در حافظه‌های جانبی، آنچنان دلچسب نیست. در این مواقع مشکل توسط قاب‌ عکس دیجیتال حل شده‌است.

قاب عکس دیجیتال که به آن قاب رسانه دیجیتال نیز گفته می‌شود، قاب عکسی است برای نمایش تصاویر دیجیتال، بدون نیاز به نیاز به کامپیوتر یا چاپ تصاویر.

ویژگی‌ها[ویرایش]

هر یک از قاب عکس‌های دیجیتال تولید شده توسط تولیدکننده‌های مختلف، ویژگی‌های اختصاصی خود را دارند، اما به‌طور کل، می‌توان موارد زیر را به عنوان ویژگی‌های کلی قاب عکس‌های دیجیتال موجود بیان کرد:

  • صفحه نمایش آن‌ها با ابعاد گوناگون موجود می‌باشد، کوچکترین آن‌ها ۷ اینچی و بزرگترینشان ۲۰ اینچی می‌باشد.
  • برخی از آن‌ها تنها توان پخش فرمت JPEG (نوعی فرمت تصویر) را دارا هستند و برخی دیگر فرمت‌های تصویری بیشتری را پشتیبانی می‌نمایند.
  • توانایی پخش و تغییر تصاویر، به‌طور خودکار، و در فواصل زمانی مشخص را دارند. (به انگلیسی: Slide Show)
  • مستقیما از طریق کابل ارتباطی تصاویر دوربین را نمایش می‌دهند و برخی حتی توانایی پشتیبانی از بلوتوث را دارند.
  • می‌توانند تصاویر شما را روی اینترنت به اشتراک بگذارند یا حتی تصاویر ایمیل شما را برای شما به نمایش دهند.
  • برخی توانایی پخش ویدئو و موسیقی را نیز دارا هستند.
  • بسیاری از آن‌ها کنترل از راه دور دارند.

محدودیت‌ها[ویرایش]

با توجه به تفاوت رزولوشن قاب عکس دیجیتال با تصاویر شما، امکان بروز مشکل در پخش تصاویر وجود دارد، به این شکل که تصویری بسیار کوچکتر نمایش داده شود، یا تصویر بسیار بزرگ‌تر دیده شود و حاشیه‌ها یا بخش‌هایی از آن نمایش داده نشوند.

تذکر امنیتی[ویرایش]

در فوریه سال ۲۰۰۸ مشخص شد که یکی از شرکت‌های تولیدکننده چینی، با قرار دادن بدافزارها در قاب عکس‌های دیجیتال تولیدی خود، اقدام به سرقت تصاویر می‌نموده است.

جستارهای وابسته[ویرایش]

منابع[ویرایش]

A digital photo frame
Huawei digital photo frame
The Meural Lightbox design for their digital canvas.

A digital photo frame (also called a digital media frame) is a picture frame that displays digital photos without the need of a computer or printer. The introduction of digital photo frames predates tablet computers, which can serve the same purpose in some situations; however, digital photo frames are generally designed specifically for the stationary, aesthetic display of photographs and therefore usually provide a nicer-looking frame and a power system designed for continuous use.

Digital photo frames come in a variety of different shapes and sizes with a range of features. Some may even play videos as well as display photographs. Owners can choose a digital photo frame that utilizes a WiFi connection or not, comes with cloud storage, and/or USB and SD card hub.

Features

Digital photo frames range in size from tiny keychain-sized units to large wall-mounted frames spanning several feet. The most common sizes range from 7 inches (18 cm) to 20 inches (51 cm). Some digital photo frames can only display JPEG pictures. Most digital photo frames display the photos as a slideshow and usually with an adjustable time interval. They may also be able to send photos to a printer, or have hybrid features. Examples are the Sony S-Frame F800, that has an integrated printer on its back,[1] or the Epson PictureMate Show.[2]

Digital photo frames typically allow the display of pictures directly from a camera's memory card, and may provide internal memory storage. Some allow users to upload pictures to the frame's memory via a USB connection, or wirelessly via Bluetooth technology. Others include support for wireless (802.11) connections or use cellular technology to transfer and share files. Some frames allow photos to be shared from a frame to another.

Certain frames provide specific application support such as loading images over the Internet from RSS feeds, photo sharing sites such as Flickr, Picasa and from e-mail.

Built-in speakers are common for playing video content with sound, and many frames also feature remote controls. Battery-operated units are also available for portable use.[3]

A new generation of frame companies, such as Meural,[4] is emerging that combines larger formats, built-in access to artistic content, and innovative control mechanisms.[5]

Aspect ratio

The aspect ratio of the frames can vary. Common aspect ratios include: 4:3, 3:2 and 16:9. (Sometimes 16:9 frames are actually 15:9)[6] Depending on the model and features, images which do not exactly fit the aspect ratio of the frame may be cropped, stretched, or shrunk to fit. This could result in, respectively, images that are missing content, distorted, or which have blank space around them. This can be avoided by buying a frame with an aspect ratio that exactly matches the camera, or editing photos to the target aspect ratio before transferring them to the frame.

Security issues

In February 2008, a number of digital photo frames, such as the Insignia brand digital frames manufactured in China, were found to be carrying a Trojan horse dubbed Mocmex on their internal data storage.[7]

Instagram allow third party app users to connect to their Instagram photo content using OAuth to display photo content and authenticate without the app storing login credentials. Digital photo frame apps are using this secure login protocol to eliminate security issues linked to storing login credentials.

History

The first generation of digital photo frames were introduced in the 1990s and included screens with the ability to accept memory cards directly from digital cameras. Widespread adoption of digital camera's in the 1990s left consumers with thousands of digital photos without a viable way to view them. Commercially available digital photo frames started to appear shortly after the introduction of digital photos but did not find market adoption until the mid 2000s when the number of digital photos exploded with the integration of digital cameras into cell phones. First generation frames enjoyed widespread market adoption. The market peaked in 2009 at over $1B worldwide, but the introduction of Apple's iPad started the markets slow decline[8][9]. First generation frames are still sold today at prices under $100.

The second generation of digital photo frames included connectivity to the Internet. In 1999 with the Ceiva introduced a digital photo frame with dialup connectivity[10]. By 2010 Nixplay and PixStar started to popularize digital frames with wifi connections, allowing consumers to upload photos from the web and connect to cloud based photo sharing and storage sites from Flickr, Picasa, Google Photos, Instagram and Facebook.

By 2016, the third generation of digital photo frames began to appear with companies like PhotoSpring, Aura and Joy. These frames employed tablet platforms to build photo frame features on top of. This allowed the use of touchscreen and battery technology for frames from PhotoSpring and Joy, and camera technology from Aura and Joy.[10]

See also

References

  1. ^ "Sony Unveils New S-Frame Digital Photo Frames with HD Video Playback" (PDF) (Press release). Hong Kong: Sony. 31 August 2010.
  2. ^ "Print and Display Your Images With Epson PictureMate Show, the Ultimate Two-in-One Digital Frame and Compact Photo Printer" (Press release). Long Beach, California: Epson. PR Newswire. 3 December 2009.
  3. ^ Schurman, Kyle. "Learning to Use Digital Photo Frames". About.com.
  4. ^ "Meural Launches" (Press release). New York: Meural. 6 April 2015.
  5. ^ Menking, William. "This Picture Frame Swaps Out Painting With The Wave Of a Hand". The Architect's Newspaper.
  6. ^ Donnell, Wendy Sheehan (15 December 2011). "How to Buy a Digital Photo Frame". PC Magazine. Retrieved 4 December 2015.
  7. ^ Gage, Deborah (18 February 2008). "Chinese PC virus may have hidden agenda". Seattle Post-Intelligencer. Retrieved 4 December 2015.
  8. ^ "January 27, 2010: Apple announces the iPad". Engadget. Retrieved 2018-07-15.
  9. ^ "Digital Photo Frames: Fading from View | Digital Picture Frame Reviews | Consumers Digest | Plus: Best Buys in Small- & Large-Screen Models | Consumers Digest". dev.consumersdigest.com. Retrieved 2018-07-15.
  10. ^ a b "The Second Coming Of Small Screens In The Home". Fast Company. 2017-12-07. Retrieved 2018-07-15.