$MAX_MODULES
$MAX_MODULES
<p>A somewhat generic detector that looks for a barcode-like rectangular region within an image.
It looks within a mostly white region of an image for a region of black and white, but mostly black. It returns the four corners of the region, as best it can determine.
findCornerFromCenter(float $centerX, float $deltaX, float $left, float $right, float $centerY, float $deltaY, float $top, float $bottom, float $maxWhiteRun) : \Zxing\ResultPoint
Attempts to locate a corner of the barcode by scanning up, down, left or right from a center point which should be within the barcode.
| float | $centerX | center's x component (horizontal) |
| float | $deltaX | same as deltaY but change in x per step instead |
| float | $left | minimum value of x |
| float | $right | maximum value of x |
| float | $centerY | center's y component (vertical) |
| float | $deltaY | change in y per step. If scanning up this is negative; down, positive; left or right, 0 |
| float | $top | minimum value of y to search through (meaningless when di == 0) |
| float | $bottom | maximum value of y |
| float | $maxWhiteRun | maximum run of white pixels that can still be considered to be within the barcode |
if such a point cannot be found
$a {@link com.google.zxing.ResultPoint} encapsulating the corner that was found
blackWhiteRange(mixed $fixedDimension, mixed $maxWhiteRun, mixed $minDim, mixed $maxDim, mixed $horizontal) : int[]
Computes the start and end of a region of pixels, either horizontally or vertically, that could be part of a Data Matrix barcode.
| mixed | $fixedDimension | |
| mixed | $maxWhiteRun | |
| mixed | $minDim | |
| mixed | $maxDim | |
| mixed | $horizontal |
with start and end of found range, or null if no such range is found (e.g. only white was found)