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Y-axis and the current point's x coordinate. Parameters for implicit absolute vertical LineTo ( V) Y parameter and the current point's x coordinate. Relative horizontal LineTo ( h) command(s).ĭraw a vertical line from the current point to the Subsequent value(s) are interpreted as parameter(s) for implicit X-axis and the current point's y coordinate. Parameter(s) for implicit absolute horizontal LineTo ( H)

Any subsequent value(s) are interpreted as X parameter and the current point's y coordinate. Pair(s) are interpreted as parameter(s) for implicit relative LineToĭraw a horizontal line from the current point to the Any subsequent coordinate pair(s) are interpreted as parameter(s)įor implicit absolute LineTo ( L) command(s).Įnd point, which is the current point shifted byĭy along the y-axis. Commandĭraw a line from the current point to theĮnd point specified by x, y. The end point ( P n) then becomes the current point for the next command ( P o′). Both download and print editions of such books should be high quality.LineTo instructions draw a straight line from the current point ( P o ), based on the parameters specified. Most newer books are in the original electronic format. Also, their file size tends to be smaller than scanned image books. These ebooks were created from the original electronic layout files, and therefore are fully text searchable. We mark clearly which print titles come from scanned image books so that you can make an informed purchase decision about the quality of what you will receive. The text is fine for reading, but illustration work starts to run dark, pixellating and/or losing shades of grey. It's the problem of making a copy of a copy. Unfortunately, the resulting quality of these books is not as high.

We essentially digitally re-master the book. Also, a few larger books may be resampled to fit into the system, and may not have this searchable text background.įor printed books, we have performed high-resolution scans of an original hardcopy of the book. However, any text in a given book set on a graphical background or in handwritten fonts would most likely not be picked up by the OCR software, and is therefore not searchable. The result of this OCR process is placed invisibly behind the picture of each scanned page, to allow for text searching. Most older books are in scanned image format because original digital layout files never existed or were no longer available from the publisher.įor PDF download editions, each page has been run through Optical Character Recognition (OCR) software to attempt to decipher the printed text. These products were created by scanning an original printed edition.