PDFBox GET begintext部分（BT ET）坐标

StackOverflow https://stackoverflow.com/questions/6802586

题

有人可以帮助我获得PDF begintext部分的真正像素坐标吗？我正在使用PDFBox从PDF文件中检索文本，但是现在我需要使该文本段/段落的矩形使矩形保持良好状态。

$contents = $page->getContents();
$contentsStream = $page->getContents()->getStream();
$resources=$page->getResources();
$fonts = $resources->getFonts();
$xobjects = $resources->getImages();
$tokens=$contentsStream->getStreamTokens();

  • pdfoperator {q}，cosfloat {690.48}，cosint {0}，cosint {0}，cosfloat {633.6}，cosint {0}，cosint {0}，{0}，pdfoperator {cm} ，pdfoperator {q}，

  • pdfoperator {bt}，cosint {1}，cosint {0}，cosint {0}，cosint {1}，cosfloat {25.92}，cosfloat {588.48}，pdfoperator {tm} cosname {f30}，cosint {56}，pdfoperator {tf}，cosint {3}，pdfoperator {tr}，cosfloat {0.334}，pdfoperator {tc} pdfoperator {tc}，coSString {e}，pdfoperator {tj}，cosfloat {9.533}，pdfoperator {tw}，cosstring {i} pdfoperator {tc}，cosstring {ciscenj}，pdfoperator {tj}，cosint {0}，pdfoperator {tc}，cosstring {e}，pdfoperator {tj} cosint {1}，cosfloat {55.68}，cosfloat {539.76}，pdfoperator {tm}，cosInt {0}，pdfoperator {tw}，cosfloat {0.262}，pdfoperator {tc}，pdfoperator {tc}，pdfop}，p.soster}，p.sostr Jotrjer {uotrjetrj，fortrjetrj，costrjetrj，fortrjetrj， cosint {0}，pdfoperator {tc}，cosstring {i}，pdfoperator {tj}，cosfloat {5.443}，pdfoperator {tw}，cosfloat {-2.145}，pdfoperator {-2.145}，pdfoperator {zostra} zytr {zoster {zoser { ，cosint {0}，pdfoperator {tc}，cosstring {g}，pdfoperator {tj}，cosfloa t {7.202}，pdfoperator {tw}，cosfloat {-0.148}，pdfoperator {tc}，cosstring {odmor}，pdfoperator {tj}，cosint {0}，pdfoperator {0}，pdfoperator { ，pdfoperator {et}，

  • pdfoperator {bt}，cosint {1}，cosint {0}，cosint {0}，cosint {1}，cosfloat {6.72}，cosfloat {513.12}，pdfoperator {tm} cosname {f30}，cosint {14}，pdfoperator {tf}，cosstring {}，pdfoperator {tj}，cosfloat {2.751}，pdfoperator {tw}，...

我想获得诸如printTextLocations函数之类的输出对每个单词/字符都可以。我可以得到底部和左协调，但是如何获得宽度和顶部坐标？

printTextLocations：

  • string[25.92,45.119995 fs=56.0 xscale=55.440002 height=40.208004 space=15.412322 width=36.978485]p string[63.22914,45.119995 fs=56.0 xscale=55.440002 height=40.208004 space=15.412322 width=33.87384]o string[97.43364,45.119995 fs = 56.0 xscale = 55.440002高度= 40.208004空间= 15.412322宽度= 30.824646] = 42.168空间= 15.412322宽度= 21.566162] r string [184.69026,45.119995 fs = 56.0 xscale xscale = 55.440002高度= 42.168 Space = 42.168 Space = 15.412322 width = 15.412322 width = 30.824646] e String [255.84557,44557,4457,4457,44557,4457,4457,457,457,44,457,44,457,44,457,44,44,457,44,457,444.44557,44,457,44,457,44; = 49.286148] M ...
有帮助吗？

解决方案

... BT部分为您提供左下的坐标，您需要将当前BT块中包含的所有单词/字母解析以获取所有其他坐标。第一个单词高度 + bt底部= top，max（左坐标 +宽度）=右，最后一个字底部=底部坐标。

我希望这可以帮助别人...

单个字母的示例字符串：

string[32.94,35.099976 fs=8.0 xscale=1.0 height=4.4240003 space=2.2240002 width=3.959999]p

提取，解析和准备好线：

32.94,35.099976 fs=8.0 xscale=1.0 height=4.4240003 space=2.2240002 width=3.959999

功能：

/**
 * Parse single word / letter element
 *
 * @param string $str_raw  Extracted word string line.
 * @param string $str_elem Element of interest, word, char.
 * @param int    $pdf_w    Pdf page width.
 * @param int    $pdf_h    Pdf page height.
 * @param int    $pdf_d    Pdf page dpi.
 * @param int    $pdf_r    Pdf page relative dpi.
 *
 * @return array
 */
function createRealCoordinates($str_raw, $str_elem, $pdf_w, $pdf_h, $pdf_d = 400, $pdf_r = 72)
{
    $stringstrip = array('fs=', 'xscale=', 'height=', 'space=', 'width=');
    $string_info = str_replace($stringstrip, '', $str_raw);

    $coord_info = explode(' ', $string_info);
    $coord_xy   = explode(',', $coord_info[0]);

    $coord = array(
        'pdfWidth'  => $pdf_w,
        'pdfHeight' => $pdf_h,
        'pdfDpi'    => $pdf_d,
        'pdfRel'    => $pdf_r,
        'word'      => $str_elem,

        'x1' => null,
        'y1' => null,
        'x2' => null,
        'y2' => null,

        'fontSize'     => null,
        'xScale'       => null,
        'HeightDir'    => null,
        'WidthDir'     => null,
        'WidthOfSpace' => null,
    );

    // Left, Bottom coordinate.
    $coord['x1'] = ($coord_xy[0] / $pdf_r) * $pdf_d;
    $coord['y2'] = ($coord_xy[1] / $pdf_r) * $pdf_d;

    $coord['fontSize']     = $coord_info[1]; // font size.
    $coord['xScale']       = $coord_info[2]; // x size scale.
    $coord['HeightDir']    = $coord_info[3]; // height.
    $coord['WidthDir']     = $coord_info[5]; // word width.
    $coord['WidthOfSpace'] = ($coord_info[4] / $pdf_r) * $pdf_d; // width of space.

    // Right, Top coordinate.
    $coord['x2'] = $coord['x1'] + (($coord['WidthDir'] / $pdf_r) * $pdf_d);
    $coord['y1'] = $coord['y2'] - (($coord['HeightDir'] / $pdf_r) * $pdf_d);

    return $coord;
}

-Matija Kancijan

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