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A camera phone is a mobile phone which is able to capture photographs and often record video using one or more built-in digital cameras. It can also send the resulting image wirelessly and conveniently. The first commercial phone with color camera was the Kyocera Visual Phone VP-210, released in Japan in May 1999.[1]

The principal advantages of camera phones are cost and compactness; indeed for a user who carries a mobile phone anyway, the addition is negligible. Smartphones that are camera phones may run mobile applications to add capabilities such as geotagging and image stitching. Also, modern smartphones can use their touch screens to direct their camera to focus on a particular object in the field of view, giving even an inexperienced user a degree of focus control exceeded only by seasoned photographers using manual focus. However, the touch screen, being a general purpose control, lacks the agility of a separate camera's dedicated buttons and dial(s).

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The usual fixed-focus lenses and smaller sensors limit performance in poor lighting. Lacking a physical shutter, some have a long shutter lag. Photoflash by the typical internal LED source illuminates less intensely over a much longer exposure time than a flash strobe, and none has a hot shoe for attaching an external flash. Optical zoom[8] and tripod screws are rare and some also lack a USB connection or a removable memory card. Most have Bluetooth and WiFi, and can make geotagged photographs. Some of the more expensive camera phones have only a few of these technical disadvantages, but with bigger image sensors (a few are up to 1", such as the Panasonic Lumix DMC-CM1), their capabilities approach those of low-end point-and-shoot cameras. The few hybrid camera phones such as Samsung Galaxy S4 Zoom and K Zoom were equipped with real optical zoom lenses.

When viewed vertically from behind, the rear camera module on some mobile phones is located in the top center, while other mobile phones have cameras located in the upper left corner. The latter has benefits in terms of ergonomy due to the lower likelihood of covering and soiling the lens when held horizontally, as well as more efficient packing of tight physical device space due to neighbouring components not having to be built around the lens.

Camera phones can share pictures almost instantly and automatically via a sharing infrastructure integrated with the carrier network. Early developers including Philippe Kahn envisioned a technology that would enable service providers to "collect a fee every time anyone snaps a photo".[19] The resulting technologies, Multimedia Messaging Service (MMS) and Sha-Mail, were developed parallel to and in competition to open Internet-based mobile communication provided by GPRS and later 3G networks.

The first commercial camera phone complete with infrastructure was the J-SH04, made by Sharp Corporation; it had an integrated CCD sensor, with the Sha-Mail (Picture-Mail in Japanese) infrastructure developed in collaboration with Kahn's LightSurf venture, and marketed from 2001 by J-Phone in Japan today owned by Softbank. It was also the world's first cellular mobile camera phone. The first commercial deployment in North America of camera phones was in 2004. The Sprint wireless carriers deployed over one million camera phones manufactured by Sanyo and launched by the PictureMail infrastructure (Sha-Mail in English) developed and managed by LightSurf.

The graphical user interface typically features a virtual on-screen shutter button located towards the usual home button and charging port side, and a thumbnail previewing the last photo, and some status icons that may display settings such as selected resolution, scene mode, stabilization, flash, and a battery indicator. The camera software may indicate the estimated number of remaining photographs until exhausted space, the current video file size, and remaining space storage while recording, as done on early-2010s Samsung smartphones. Shortcuts to settings in the camera viewfinder may be customizable.[33][34][35]

In September 2013, Apple introduced a camera viewfinder layout with iOS 7 that would be implemented by several other major vendors towards the late 2010s. This layout has a circular and usually solid-colour shutter button and a camera mode selector using perpendicular text and separate camera modes for photo and video. Vendors that have ditched their layout to implement variations of Apple's layout include Samsung, Huawei, LG, OnePlus, Xiaomi, and UleFone.[36]

Retaining focus also has in the past been implemented through holding the virtual shutter button.[41] Another common use of holding the shutter button is burst shot, where multiple photos are captured in quick succession, with varying resolutions, speeds, and sequential limits among devices, and possibly with an option to adjust between speed and resolution.[42]

Shutter lag varies depending on computing speed, software implementation, and environmental brightness.[43] A shutter animation such as skeuomorphic aperture diaphragm blades or a simple short black-out may be featured.[44] A haptic (vibration) feedback may be used to signify a captured photograph, which is of use when holding the smartphone in an angle with poor visibility of the screen.[45]

Lock screens typically allow the user to launch the camera without unlocking to prevent missing moments. This may be implemented through an icon swiped away from. Launching from anywhere may be possible through double-press of power/stand-by or home button, or a dedicated shutter button if present.[46][47][48]

Like dedicated (stand-alone) digital cameras, mobile phone camera software usually stores pictures and video files in a directory called DCIM/ in the internal memory, with numbered or dated file names. The former prevents missing out files during file transfers and facilitates counting files, whereas the latter facilitates searching files by date/time, regardless of file attribute resets during transfer and possible lack of in-file metadata date/time information .[61][62]

High-dynamic-range imaging, also referred to as "rich tone", keeps brightness across the image within a visible range. Camera software may have an option for turning HDR off, to avoid possible shutter lag and ghosting. Some software allows retaining both HDR and non-HDR variants of the same photo. HDR may be supported for panorama shots and video recording, if supported by the image sensor.[75][76]

The camera phone, like many complex systems, is the result of converging and enabling technologies. Compared to digital cameras, a consumer-viable camera in a mobile phone would require far less power and a higher level of camera electronics integration to permit the miniaturization.

The first commercial camera phone was the Kyocera Visual Phone VP-210, released in Japan in May 1999.[104] It was called a "mobile videophone" at the time,[105] and had a 110,000-pixel front-facing camera.[104] It stored up to 20 JPEG digital images, which could be sent over e-mail, or the phone could send up to two images per second over Japan's Personal Handy-phone System (PHS) cellular network.[104] The Samsung SCH-V200, released in South Korea in June 2000, was also one of the first phones with a built-in camera. It had a TFT liquid-crystal display (LCD) and stored up to 20 digital photos at 350,000-pixel resolution. However, it could not send the resulting image over the telephone function, but required a computer connection to access photos.[106] The first mass-market camera phone was the J-SH04, a Sharp J-Phone model sold in Japan in November 2000.[107][106] It could instantly transmit pictures via cell phone telecommunication.[108]

Cameras on cell phones proved popular right from the start, as indicated by the J-Phone in Japan having had more than half of its subscribers using cell phone cameras in two years. The world soon followed. In 2003, more camera phones were sold worldwide than stand-alone digital cameras largely due to growth in Japan and Korea.[109] In 2005, Nokia became the world's most sold digital camera brand. In 2006, half of the world's mobile phones had a built-in camera.[citation needed] In 2006, Thuraya released the first satellite phone with an integrated camera. The Thuraya SG-2520 was manufactured by Korean company APSI and ran Windows CE. In 2008, Nokia sold more camera phones than Kodak sold film-based simple cameras, thus becoming the biggest manufacturer of any kind of camera.[citation needed] In 2010, the worldwide number of camera phones totaled more than a billion.[110] Since 2010, most mobile phones, even the cheapest ones, are being sold with a camera. High-end camera phones usually had a relatively good lens and high resolution.

Personal photography allows people to capture and construct personal and group memory, maintain social relationships as well as expressing their identity.[131] The hundreds of millions[132]of camera phones sold every year provide the same opportunities, yet these functions are altered and allow for a different user experience. As mobile phones are constantly carried, they allow for capturing moments at any time. Mobile communication also allows for immediate transmission of content (for example via Multimedia Messaging Services), which cannot be reversed or regulated. Brooke Knight observes that "the carrying of an external, non-integrated camera (like a DSLR) always changes the role of the wearer at an event, from participant to photographer".[133] The camera phone user, on the other hand, can remain a participant in whatever moment they photograph. Photos taken on a camera phone serve to prove the physical presence of the photographer. The immediacy of sharing and the liveness that comes with it allows the photographs shared through camera phones to emphasize their indexing of the photographer.

Camera phones have also been used to discreetly take photographs in museums, performance halls, and other places where photography is prohibited. However, as sharing can be instantaneous, even if the action is discovered, it is too late, as the image is already out of reach, unlike a photo taken by a digital camera that only stores images locally for later transfer. However, as the newer digital cameras support Wi-Fi, a photographer can perform photography with a DSLR and instantly post the photo on the internet through the mobile phone's Wi-Fi and 3G capabilities. be457b7860