But I will give a brief overview of the main issues and explain how some of the features of the Portable Network Graphics format fit into the picture. I won't attempt to cover the subject in detail an entire book could be written on it-and, indeed, Charles Poynton has done just that. To understand the solutions, one must first become acquainted with the problems. As recently proposed standards are approved and implemented in hardware, from graphics cards, to monitors, to printers and scanners, there is reason to expect that platform-independent color will become the norm, not the exception, in the new millennium. PNG certainly doesn't solve all of these problems, but it does provide image authors with the means to minimize many of them, as long as the editing and viewing software is written properly.
And in the absence of tedious calibration procedures and high-end color-conversion software, what comes out of the printer is, at best, only a vague approximation of what the screen shows. Even on a single machine there are usually obvious changes in brightness and color as the monitor (CRT) warms up, not to mention when the user adjusts the screen controls. A pure yellow on one machine may have an orange or greenish tint on another. Images created on Macs tend to look too dark on PCs images created on PCs tend to look too bright and washed out on Macs. Gamma Correction and Precision ColorĪnyone who has transferred images between a PC and a Macintosh-or even simply viewed on one platform an image created on another-has probably noticed one of the little gotchas of the computer world: images don't look the same on all systems.
0 kommentar(er)
