Save the pixels per inch (PPI) according your own device, then you can use this ruler next time.ĭragging ruler adjuster left or right to fit the size of your reference object, My mobile phones (Sony Xperia C5, OPPO R11 Plus) are both 122.6 PPI,Īpple iPhone 5 is 163 PPI, iPhone 7 is 162 PPI, iPhone X is 151.7 PPI. Now i have the most accurate virtual ruler on the web. So i adjust the default pixels per inch(PPI) to 100.7, I found the markings are not very accurate at 30cm, In the office, a A4 size printable paper is a good comparison object,īelow ruler adjuster help us to calibrate accuracy more easily.Īfter i measure the size of virtual ruler by an actual ruler, You can compare to any standard size object at your side,Į.g., coin, credit card, CD, paper money, mobile phone, When you know the width, you can adjust the ruler's PPI setting by it, Then search 'the width of your paper money' online, Use standard objects to compare lengths, check your wallet, use any paper money to be our compare object,.I am lucky and found my screen has 100 PPI. Search 'display by pixel density' online, check if there has your device's brand and model,.The screen resolution of your current device is pixels. 72 Points in one inch.To have the most accurate ruler online, just set the pixels per inch(PPI),īelow are some ways to know the pixels per inch to your device. Image resolution, number of pixels and print size are related mathematically: Pixels = Resolution (DPI) × Print size (in inches) 300 DPI for halftone images 500 DPI for combination art 1000 DPI for line art. Number of pixels versus resolution and print size, for bitmap images In these cases, the author can help by suggesting an appropriate final size for the combination (single, 1.5, two column).

Halftone/line art combinations are difficult to size, as factors for one may be detrimental for the other part. If a collection of artwork contains more than one halftone, again make sure that there is consistency in size between similar diagrams. The best advice that we give to our graphics suppliers is to not over-reduce halftones, and pay attention to magnification factors or scale bars on the artwork and compare them with the details given in the artwork itself. It is sometimes difficult to know what an author is trying to emphasize on a photograph, so you can help us by identifying the important parts of the image, perhaps by highlighting the relevant areas on a photocopy. Sizing of halftones (photographs, micrographs, etc) can normally cause more problems than line art.

All relevant detail in the illustration, the graph symbols (squares, triangles, circles, etc) and a key to the diagram (explaining the symbols used) must be discernible.

Tints and shadings have to be printable at finished size. These all have a bearing on the reproducibility/readability of the final artwork. When Elsevier decides on the size of a line art graphic, in addition to the lettering, there are several other factors to assess. There are instances where other factors in the artwork (e.g., tints and shadings) dictate a finished size of perhaps 10 pt. This is a rule-of-thumb rather than a strict rule. Smaller lettering will yield text that is hardly legible. Please check the journal-specific guide for authors (available from the homepage of the journal in question).Īs a general rule, the lettering on the artwork should have a finished, printed size of 7 pt for normal text and no smaller than 6 pt for subscript and superscript characters. It is important to be aware of the journal style, as some of our publications have special instructions beyond the common guidelines given here. Elsevier's aim is to have a uniform look for all artwork contained in a single article.

Print to scale half mm lines