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Sony α7 IV
The Sony α7 IV (model ILCE-7M4) is a full-frame mirrorless interchangeable-lens camera manufactured by Sony. It was announced on 21 October 2021 as the successor to the Sony α7 III. Featuring a new 34.1MP (approx. total). Back-illuminated sensor, back-illuminated CMOS sensor inside, latest BIONZ XR™ image processor, Real-Time Eye AF tracking and 4K 60p video with Super 35mm mode Features The camera features several advancements from its predecessor the Sony α7 III, also incorporating some pro features from the high-end Sony α1. * 33 Megapixel, MP (approx. effective) full-frame Back-illuminated sensor, BSI-CMOS sensor * 759 Autofocus#Phase detection, Phase Detection AF Points and 425 Autofocus#Contrast detection, Contrast Detection AF points * Featuring Real-time Continuous Eye-AF Tracking for Human, Animal & Bird * Improved UI Layout (New menu structure) compared to its Sony α7 III, predecessor * Closed mechanical shutter function (previously this feature debuted in α1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BSI-CMOS
file:comparison_backside_illumination.svg, Comparison of simplified back-illuminated and front-illuminated pixel cross-sections A back-illuminated sensor, also known as backside illumination (BI) sensor, is a type of digital image sensor that uses a novel arrangement of the imaging elements to increase the amount of light captured and thereby improve low-light performance. The technique was used for some time in specialized roles like low-light security cameras and astronomy sensors, but was complex to build and required further refinement to become widely used. Sony was the first to reduce these problems and their costs sufficiently to introduce a 5-megapixel 1.75 µm BI CMOS sensor at consumer electronics, general consumer prices in 2009.''Sony'', 2009 BI sensors from OmniVision Technologies have since been used in consumer electronics from other manufacturers as in the HTC EVO 4G Android smartphone, and as a major selling point for the camera in Apple's iPhone 4.''Apple'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heic
High Efficiency Image File Format (HEIF) is a container format for storing individual digital images and image sequences. The standard covers multimedia files that can also include other media streams, such as timed text, audio and video. HEIF can store images encoded with multiple coding formats, for example both SDR and HDR images. HEVC is an image and video encoding format and the default image codec used with HEIF. HEIF files containing HEVC-encoded images are also known as HEIC files. Such files require less storage space than the equivalent quality JPEG. HEIF files are a special case of the ISO Base Media File Format (ISOBMFF, ISO/IEC 14496-12), first defined in 2001 as a shared part of MP4 and JPEG 2000. Introduced in 2015, it was developed by the Moving Picture Experts Group (MPEG) and is defined as Part 12 within the MPEG-H media suite (ISO/IEC 23008-12). HEIF was adopted by Apple in 2017 with the introduction of iOS 11. History The requirements and main use c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
10-bit H
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color Depth
Color depth or colour depth (see spelling differences), also known as bit depth, is either the number of bits used to indicate the color of a single pixel, or the number of bits used for each color component of a single pixel. When referring to a pixel, the concept can be defined as bits per pixel (bpp). When referring to a color component, the concept can be defined as bits per component, bits per channel, bits per color (all three abbreviated bpc), and also bits per pixel component, bits per color channel or bits per sample (bps). Modern standards tend to use bits per component, but historical lower-depth systems used bits per pixel more often. Color depth is only one aspect of color representation, expressing the precision with which the amount of each primary can be expressed; the other aspect is how broad a range of colors can be expressed (the gamut). The definition of both color precision and gamut is accomplished with a color encoding specification which assigns a digita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Compression
In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original representation. Any particular compression is either lossy or lossless. Lossless compression reduces bits by identifying and eliminating statistical redundancy. No information is lost in lossless compression. Lossy compression reduces bits by removing unnecessary or less important information. Typically, a device that performs data compression is referred to as an encoder, and one that performs the reversal of the process (decompression) as a decoder. The process of reducing the size of a data file is often referred to as data compression. In the context of data transmission, it is called source coding; encoding done at the source of the data before it is stored or transmitted. Source coding should not be confused with channel coding, for error detection and correction or line coding, the means for mapping data onto a signal. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AVCHD
AVCHD (Advanced Video Coding High Definition) is a file-based format for the digital recording and playback of high-definition video. It is H.264 and Dolby AC-3 packaged into the MPEG transport stream, with a set of constraints designed around the camcorders. Developed jointly by Sony and Panasonic, the format was introduced in 2006 primarily for use in high definition consumer camcorders. Related specifications include the professional variants AVCCAM and NXCAM. Favorable comparisons of AVCHD against HDV and XDCAM EX solidified perception of AVCHD as a format acceptable for professional use. Both Panasonic and Sony released the first consumer AVCHD camcorders in spring of 2007. Panasonic released the first AVCHD camcorder aimed at the professional market in 2008, though it was nothing more than the (by then discontinued) FLASH card consumer model rebadged with a different model number. In 2011 the AVCHD specification was amended to include 1080-line 50-frame/s and 60-frame/s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sony α7S III
The Sony α7S III (model ILCE-7SM3) is a 12.2-megapixel full-frame mirrorless interchangeable-lens camera made by Sony. It was publicly announced on online with a suggested retail price of (body only) at the time. The α7S III is offered as a body only. Features * New 12MP Exmor R BSI CMOS sensor * 9.44 million-dot viewfinder (2048 x 1536 pixels) (3.15MP) (QXGA) *Can record FHD@240fps, 4K resolution, 4K@120fps Color depth, 10bit 4:2:2 and 4K resolution, 4K@120fps Raw video, Raw over HDMI (up to 16-bit 4.2K (4264 x 2408) 60fps) *Dual Gain (ISO) modes for cleaner low-light recording * 5-axis in body image stabilization * LCD touchscreen (3 inch/7.5 cm) fully articulated * Multi Interface Shoe (alongside k3m xlr adapter and new microphones using direct digital signal) * 4th Revision body with improved cooling, weather sealing and better overall handling (one-layer disassembly for replacement of audio ports) * Dual function memory card slots, for both SD card, SDXC UHS-II ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imatest
Imatest LLC is a company that produces image quality testing software, equipment and test charts. Imatest was founded by photographer/engineer Norman Koren in Boulder, Colorado in 2004 to develop software for testing digital camera image quality. Using Imatest software, a variety of image quality factors can be analyzed including Acutance (image sharpness), color response, image noise, dynamic range, tonal response, lens flare, lens distortion, lens vignetting, texture response, and color moiré. Imatest software products include Imatest Master: for R&D engineers, Imatest IT: for test automation, and Imatest Studio: for photographers. Imatest test charts include SFRplus, eSFR ISO, SFRreg, Spilled Coins, and 36-patch Dynamic Range targets. Imatest has been adopted by a wide range of industries that employ embedded digital imaging systems, including mobile imaging (camera phones), automotive, medical imaging, aerospace and machine vision, as well as publications/reviews, and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CFexpress
CFexpress is a standard for removable media cards proposed by the CompactFlash Association (CFA). The standard uses PCIe 3.0 interface with 1 to 4 lanes where 1 GB/s data can be provided per lane. NVM Express is also supported to provide low overhead and latency. There are multiple form factors that feature different PCIe lane counts. One of the goals is to unify the ecosystem of removable storage by being compatible with standards already widely adopted, such as PCIe and NVMe. There already is a wide range of controllers, software and devices that uses these standards, accelerating adoption. History On 7 September 2016, the CompactFlash Association announced CFexpress. The specification would be based on the PCI Express interface and NVM Express protocol. On 18 April 2017 the CompactFlash Association published the CFexpress 1.0 specification. Version 1.0 will use the XQD form-factor (38.5 mm × 29.8 mm × 3.8 mm) with two PCIe 3.0 lanes for speeds up to 2 GB/s. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secure Digital
Secure Digital, officially abbreviated as SD, is a proprietary format, proprietary non-volatile memory, non-volatile Flash memory, flash memory card format developed by the SD Association, SD Association (SDA) for use in portable devices. The standard was introduced in August 1999 by joint efforts between SanDisk, Panasonic (Matsushita) and Toshiba as an improvement over MultiMediaCard, MultiMediaCards (MMCs), and has become the industry standard. The three companies formed SD-3C, LLC, a company that licenses and enforces intellectual property rights associated with SD memory cards and SD host and ancillary products. The companies also formed the SD Association (SDA), a non-profit organization, in January 2000 to promote and create SD Card standards. SDA today has about 1,000 member companies. The SDA uses several trademarked logos owned and licensed by SD-3C to enforce compliance with its specifications and assure users of compatibility. History 1999–2003: Creation In 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
XAVC
XAVC is a recording format that was introduced by Sony on October 30, 2012. XAVC is a format that will be licensed to companies that want to make XAVC products. Technical details XAVC uses level 5.2 of H.264/MPEG-4 AVC, which is the highest level supported by that video standard. XAVC can support 4K resolution (4096 × 2160 and 3840 × 2160) at up to 60 frames per second (fps). XAVC supports color depths of 8, 10, and 12 bits. Chroma subsampling can be 4:2:0, 4:2:2, or 4:4:4. The Material Exchange Format (MXF) can be used for the digital container format. XAVC allows for a wide range of content production including intra frame recording and long group of pictures (GOP) recording. XAVC S On April 7, 2013, Sony announced that it had expanded XAVC to the consumer market with the release of XAVC S. XAVC S supports resolutions up to 3840 × 2160, uses MP4 as the container format, and uses either AAC or LPCM for the audio. As example used in the Sony FDR-AX100 4K Ultra HD consumer c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
