Boston Wedding Photographer - Hidden Secrets Of Your Weddin Photo.
Cape Cod Wedding Photographer in a photographic moment and keep driving to the next and try to capture the bride and groom at their best on their wedding day. Posting on blogs and sharing wedding, to send pictures via cell phone, hurry wedding couples their newly photographed wedding photos from friends and relatives. Whether e-mail, CD, or even the Internet, tend wedding photography, traveling and occasionally end up in strange places. The most popular wedding photography format is the JPEG format. Realize brides, grooms and even wedding photographers might not be able to influence their wedding photos, a wedding couple's privacy. JPEG has some hidden levels of data and information that most users are not there.
JPEG history
The development of the JPEG standard began as far back as in 1983. In April 1983, when the International Organization for Standardization (ISO) to a process for the conversion of work into photo-quality graphics on text terminals.
In 1986, the ISO International Telegraph and Telephone Consultative Committee (CCITT) constitute the Joint Photographic Experts Group (JPEG). (- Telecommunication Standardization Sector International Telecommunication Union) announced the CCITT is now known as ITU-T.
The committee gave the JPEG standard in 1992 and it was approved in 1994 as ISO 10918-1. The JPEG format usually uses a lossy data compression method to transform an image. This compression method can, the image file size, but at the expense of image quality. The higher the compression used, the higher the deterioration of image quality.
(To jump on this technical study to identify hidden data are JPEG) JPEG technology
In a typical 24-bit JPEG encoding process starts with an initial color space transformation. The RGB values that make up an image in a different color space called YCbCr converted. The Y channel isBrightness, while the other two combined channels of hue and saturation.
The human eye is suitable in detail in the Y channel, so that the coding developed with this information. The next step is for the other two channels and downsampling them to accept results in the reduction of its sampling rate. This process reduces the data size. The channels are then individually executed by a DCT (Discrete Cosine Transform). This process involves under each channel and the division into 8x8 pixel tiles and the operation of the DCT to compress the data.
The next process consists in the compressed channels and quantizing them. The quantization is the main part of the data compression and reduces the amount of high frequencies in the channels available that distinguish the human eye. Note that the artifacts are usually in highly compressed JPEG images, the user sees is a result of the compression is performed in the quantization.
Then the result is entropy to compress the data further. Entropy coding is a lossless compression method that compresses the data without data loss. The first pass is compressed using RLE (Run Length Encoding). Finally, the resultant data is then compressed using Huffman encoding.
The IJG (Independent JPEG Group) developed a standard called JFIF (JPEG File Interchange Format). This format was necessary to create files in the JPEG data. JFIF was originally developed by Eric Hamilton. This format allows the JPEG data to be used on different platforms. This format boasted many features, some of which are: JPEG compression, PC / Mac / Unix compatibility, YCbCr color space, any many other features. Today's typical wedding photo is a JPEG JFIF or Exif.
The EXIF (Exchangeable Image File Format) will be almost universally used by wedding photographers with digital cameras. Exifwas created by the JEIDA (Japan Electronic Industry Development Association). This specification uses the existing JPEG file format, adding a twist: metadata tags. This is where a JPEG file can contain many levels.
