Method and apparatus for deriving image width and height from ra

Image analysis – Image transformation or preprocessing – Measuring image properties

Patent

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Details

382278, G06K 936

Patent

active

055599044

ABSTRACT:
The present invention involves a method of deriving the height and width of a graphic image from raw graphical image data stored in a computer system. It includes commencing execution of a height-width derivation program in the computer system and, at least once, operating the height-width derivation program to perform a series of steps. These include calculating the area of the image size, e.g. using the total number of bytes, and calculating the square root of the area to obtain a first value, and then determining by assumption a first assumed width and a first assumed height. For example, these assumptions may be achieved by calculating one half of the first value to obtain a first assumed width value and dividing the area by the first assumed width value to obtain a first assumed height value. Next, the first assumed height value and first assumed width value are rounded to the nearest whole number, further adjusting said values by predetermined increments and the resulting adjusted values are multiplied until their product produces the closest value equal to the area of the image size to obtain a second assumed height value and a second assumed width value. The method also involves a series of iterations to determine error indexes for various altered assumed values and finding the values with the lowest error index.

REFERENCES:
patent: 5129013 (1992-07-01), Holzmann et al.
patent: 5287417 (1994-02-01), Eller et al.

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