Vocabulary Words

2-stage shutter release is a shutter release, that when pressed halfway, it activates the autofocus and the light meter of the camera, setting them to achieve correct focus and exposure.

Holding the release at mid-course maintains the focusing point and allows for re-composition if desired. A further press on the shutter release takes the picture.

*Think about when you’re focusing your camera. Whenever you press the shutter down half way, it will automatically focus on what you’re shooing (if auto focus is on). That’s exactly what it is.

Process of reducing size of digital files by changing the way the data is coded (It does not involve a physical change in the way the data itself is stored; there is no physical squeezing or squashing). * Uncompressed data may be re-coded in a more space-efficient form without any loss of original information (the compression is 'lossless') or it may be coded to lose specific parts of the data which are considered less important than other parts (the compression is 'lossy').

*When you save a picture in Photoshop, a small box will pop up. Within that box, there is a section for your image’s quality. This is choosing the images compression.The lower the number, the worse the quality (the picture is more pixelated). This looks worse, but it a way to say space. The higher the number, the better the quality, but this could take up a lot of space.

Analogy of compressing a group…

Compression

http://www.panohelp.com/jpegquality.html

Compressed graphic format standardized by the Joint Photographic Experts Group (JPEG). This supports up to 24-bit color, which makes JPEG a good format for storing digital photos.JPEG images are commonly used for Web graphics and for storing photos taken with digital cameras. They are usually saved with a .JPG extension.

The term actually stands for "Joint Photographic Experts Group," because that is the name of the committee that developed the format. But you don't have to remember that because even computer nerds will think you're weird if you mention what JPEG stands for. Instead, remember that a JPEG is a compressed image file format. JPEG images are not limited to a certain amount of color, like GIF images are. Therefore, the JPEG format is best for compressing photographic images. So if you see a large, colorful image on the Web, it is most likely a JPEG file.

Jaggies are stair-like lines that appear where there should be smooth straight lines or curves. For example, when a nominally straight, un-aliased line steps across one pixel, a dogleg occurs halfway through the line, where it crosses the threshold from one pixel to the other.

*Jaggies can occur for a variety of reasons, the most common being that the output device (display monitor or printer) does not have enough resolution to portray a smooth line. In addition, jaggies often occur when a bit-mapped image is converted to a different resolution. This is one of the advantages that vector graphics has over bit-mapped graphics – the output looks the same regardless of the resolution of the output device