by clicking the arrows at the side of the page, or by using the toolbar.
by clicking anywhere on the page.
by dragging the page around when zoomed in.
by clicking anywhere on the page when zoomed in.
web sites or send emails by clicking on hyperlinks.
Email this page to a friend
Search this issue
Index - jump to page or section
Archive - view past issues
FLEXO Magazine : Dec 09
14 FLEXO DECEMBER 2009 www.flexography.org also clearly illustrates the limitations of the iPhone and iPod Touch screens. On the Internet, one can find ICC profiles that have been created specifically for iPhone 2G and 3G screens. When comparing them in a gamut viewing tool, it is clear that nei- ther of the two devices come close to sRGB (like most moni- tors used in an office environment), and certainly not close to AdobeRGB (like dedicated monitors for prepress environ- ments). And while the iPhone 3G may have a bigger gamut than the 2G or the iPod Touch, it is still limited. It is important to note that Apple has never claimed that the screens on the iPhone are sRGB or calibrated. SNAPPING PICTURES In its product information, Pantone claims that it is pos- sible to take a picture with the iPhone, or upload a picture to the iPhone, and "snap" a selected color to a similar one in the Pantone libraries. VIGC put this claim to the test. It made a picture of a color patch in the PANTONE GOE guide, the same color as that used in the first test. The picture was taken in a D50 light box. No shadow was cast on the patch, so as not to influence the results. The outcome was disappointing. The "snapped" color was 32-5-2 C---a totally different color, both on screen and on the printed patch. It can be argued that such disparity can be attributed to the iPhone camera. So VIGC conducted another test. The orga- nization uploaded to the iPhone an artificial image with the RGB values specified in the Pantone Goe guide. Once again, the software snapped to a different color: 39-1-5 C. In addition to the 37-5-1 C color, VIGC also tested follow- ing the following colors: 1-1-7 C (Medium Yellow C); 23-1-7 C (Bright Red C); 70-1-7 C (Dark Blue C); 105-1-7 C (Bright Green C); and 165-1-7 C (Neutral Black C). For these colors, the VIGC noticed some remarkable color differences between the two devices. The compari- son between the Phone 3G and the printed Goe guide did not produce the expected results either. For the green and blue colors, the esults were at times highly divergent. The "snap" test with he iPhone camera never came close o the original color. Similarly, the "snap" est with artificial RGB images failed o deliver a correct esult. For all six col- ors tested by VIGC, he myPANTONE application for the Phone failed. INACCURATE COLOR RENDERING "We can quite quickly conclude that this application is unreliable as a color reference tool," said Hagen. "Pantone should have tested this tool thoroughly beforehand. We were able to spot a significant color difference after just one test. Pantone claims to be a color authority in the industry, so it should know that the screen of the iPhone is not accurate enough to create a visual reference." Hagen was keen to warn the industry about the potential consequences of using the application: "Designers specify colors in Pantone, which means printers must comply with these colors. As such, we need a high level of accuracy and reliability. Unfortunately, this is not what myPANTONE for the iPhone delivers. In fact, the application could prove to be a liability for the industry. Our VIGC study clearly presents evidence that the iPhone application does not completely live up to the claim of being the color authority, in spite of the industry 's growing need for reliable color references." USER CAUTION After reviewing the study and its results, Andy Hatkoff, vice president of OEM and technology licensing at Pantone, expressed some concern and disappointment. "It is quite correct when the report states that the iPhone does not have a calibrated screen, although there seems to be a bit of confu- sion about the intended use of myPANTONE. "To clarify: we have never positioned the myPANTONE ap- plication as a tool for accuracy in a color-critical environment. In fact, we have provided disclaimers in several places in the myPANTONE app, including at the bottom of the product de- scription on the iTunes app store. Any app on the iPhone that uses color to its benefit (including photo apps) suffers from the same issue---the current iPhones cannot be calibrated and color therefore cannot be assured." Haktoff noted that X-Rite and Pantone were well aware of the differences among displays of various versions of the iPhone. "For example, the first iPhones were set to a cooler white point that made the screen whiter and bluer, while subsequent versions used a warmer color temperature and different white point. On a computer, you are able to adjust your monitor's color temperature to whatever suits you. The iPhone, being much less tweakable than a Mac or PC, doesn't offer such a setting. "On the technical side, the Software Developer Kit (SDK) provided by Apple does not give us access to anything about the actual display except its size. At this point in time, the SDK does not offer the possibility to provide any control over the calibration of the display. "As a result, myPANTONE should not be used as a way to validate and approve color. MyPANTONE is a creative tool and not a production tool. It allows you to capture the idea of color with a cool mobile phone that is used broadly in the design community. You can then take that color and play with it, amend it and use it as inspiration in your design pro- cess. That's what we intended when we developed myPAN- TONE. A Pantone® Color Guide should always be used for an accurate representation of a color in a print environment, regardless of whether you use an app or a monitor in the design process." Comparing the iPhone 3G with the printed GOE guide revealed a noticeable difference. TECHNOLOGIES & TECHNIQUES
Sustainable EOY 2009