Suboptimal contrast and graphical quality of your subs, below-normal vision of your viewers and poor viewing conditions will require increasing the font size. Even though this aspect of subtitle appearance will feature prominently in several other articles in the series, it directly interacts with font size, so it has to be discussed here as well.
The bigger the text size, the bigger the openings within and between characters, which leads to more image interference. It becomes particularly apparent with bright, detailed and fast-moving backgrounds. At a certain size your peripheral vision will start failing to register the minimum-gap flash from time to time. Smaller sizes lead to increased eye strain. Note that these three effects diminish as contrast gets higher — but only if you meet the other requirements.
While most researchers found no significant difference in reading performance between smooth and jagged text, some report a slight positive effect of ClearType subpixel rendering. Credit: Microsoft Typography. This can be a factor worth keeping in mind when creating 4-color DVD subtitles, for example.
For burned-in subs, video quality also plays a role. Poor rendering and low bitrates will often produce visual artifacts around the letters, making them harder to read especially closer to 0.
For closed subs, low projection quality has a similar effect. Older surtitle systems and subtitle glasses, for instance, can give your text a tad of blur:. Cinema subs in subtitle glasses , BBC. Interestingly, Virtual Reality subtitles also suffer from this, despite the super-high resolutions of modern head-mounted displays. Those with serious vision loss will opt for audio description, but even a moderate deviation from the norm can make subs look a bit blurry, thus affecting your reading.
If not, values close to 0. A personal anecdote: I once had to subtitle a DVD series aimed at inmates. Knowing that they often have eyesight issues and no way of correcting those, we decided to use a large font size, which turned out to be the right idea. Yes, some folks might watch your stuff like this:. The Frame for photo with daisys - About, girls! About, the stars of the daisies! I love you. Flower Frame psd png Sunny Lilies, golden shine free download. Framework for a photo - These red roses.
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