* Undesirable Automatic Features - Many NTSC TV receivers feature an Auto-Tint circuit to make hue fluctuations less visible to uncritical viewers. This means that PAL/625 can produce pictures of greater contrast.
* Lower Gamma Ratio - The gamma value for NTSC/525 is set at 2.2 as opposed to the slightly higher 2.8 defined for PAL/625. * Susceptablity to Hue Fluctuation - Variations in the colour subcarrier phase cause shifts in the displayed colour, requiring that the TV receivers be equiped with a Hue adjustment to compensate. This is because of the greater likelihood of interaction with the monochrome picture signal at the lower sub-carrier frequency. * Smaller Luminance Signal Bandwidth - Due to the placing of the colour sub-carrier at 3.58MHz, picture defects such as moire, cross-colour, and dot interference become more pronounced. NTSC/525 Disadvantages * Lower Number of Scan Lines - Reduced clarity on large screen TVs, line structure more visible. * Less inherent picture noise - Almost all pieces of video equipment achieve better signal to noise characteristics in their NTSC/525 form than in their PAL/625. * Atomic Colour Edits - With NTSC it is possible to edit at any 4 field boundary point without disturbing the colour signal. NTSC/525 Advantages * Higher Frame Rate - Use of 30 frames per second (really 29.97) reduces visible flicker. The techniques that are used to overcome these limitations are discussed elsewhere. In the section below, I have tried to create as objective as possible a comparison of these various pros and cons. All these systems are a compromise and many efforts have been made over the years to address the shortcomings in each of the systems. While NTSC has a reputation for poor colour accuracy, this is only really true of broadcast television and as a video format it has some distinct advantages over the other systems. TV Systems: A Comparison Section Headings * TV Picture Format/Colour System Combinations * The Relative Merits of TV Systems o NTSC - Pros and Cons o PAL - Pros and Cons o SECAM - Pros and Cons TV Picture Format/Colour System Combinations The Main Video Signal Standards Name Frame/Field rate Aspect Ratio Scan Lines TV standard Colour System Subcarrier Freq NTSC 29.97/59.94 4:3 525 EIA NTSC 3.58MHz PAL-M 29.97/59.94 4:3 525 EIA PAL 3.58MHz SECAM-M 29.97/59.94 4:3 525 EIA SECAM ?.?MHz PAL 25/50 4:3 625 CCIR PAL 4.43MHz SECAM 25/50 4:3 625 CCIR SECAM 4.25/4.40MHz D-MAC 25/50 4:3 or 16:9 625 D-MAC D-MAC N/A PALplus 25/50 16:9 625 CCIR PAL 4.43MHz HiVision 60/120 16:9 1125 HiVision MUSE Unknown The Relative Merits of TV Systems The differences between each of the main TV systems are not quite as clear cut as one might at first imagine. GoogleĮnter text or a webpage URL, or upload a document. YouTube Calendar Photos Documents Reader Sites Groups Web Images Maps News Orkut Books Gmail more ▼ All the photo frames that come with ArtSuite can be customized, and you can change the color of the frame, alter the brightness and the intensity, and even create a frame with ragged edges, a scratched surface, page curl, etc.You can also create your own frames.
Labels: digital_anarchy, photoshop, plug-in, toonitĬomment and PermaLink Subscribe to Photoshop Notes by EmailĪKVIS ArtSuite 6 is a Photoshop compatible plug-in that provides photo effects along with an impressive collection of photo frames (edge effects). The plug-in uses advanced algorithms to create cartoon shading and lines.
ToonIt! allows you to provide a cartoon look to your existing photos. ToonIt! 2.5 is a new version of a photo cartooning Adobe PhotoshopĬompatible plug-in that we have reviewed earlier. Digital Anarchy ToonIt! 2.5: The Indezine Review