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更新跳过空白页算法v1.10，优化算法效能

This commit is contained in:
yangjiaxuan 2023-12-11 11:28:53 +08:00
parent b0274c4b31
commit f3a06285ff
2 changed files with 48 additions and 36 deletions
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37
hgdriver/ImageProcess/ImageApplyDiscardBlank.cpp
View File

@ -33,28 +33,38 @@ void CImageApplyDiscardBlank::apply(std::vector<cv::Mat>& mats, bool isTwoSide)
} }
} }
bool maxMinCompare(const cv::Mat& img, const cv::Mat& mask, double devTh, double meanTh) bool maxMinCompare(const cv::Mat& img, const cv::Mat& mask, double devTh, double bgc)
{ {
double min, max; double min, max;
cv::minMaxLoc(img, &min, &max, 0, 0, mask); cv::minMaxLoc(img, &min, &max, 0, 0, mask);
if (cv::mean(img, mask)[0] < meanTh)
return false; return abs(max - bgc) < devTh && abs(min - bgc) < devTh;
return (max - min) < devTh;
} }
static int a = 0;
bool CImageApplyDiscardBlank::apply(const cv::Mat& pDib, double threshold, int edge, double devTh, double meanTh, int dilate) bool CImageApplyDiscardBlank::apply(const cv::Mat& pDib, double threshold, int edge, double devTh, double meanTh, int dilate)
{ {
if (pDib.empty()) if (pDib.empty())
return true; return true;
double resizeScale = 1.0; double resizeScale = 1.0;
while (pDib.cols * resizeScale > 400) while ((pDib.cols * resizeScale > 500) && (pDib.rows * resizeScale > 500))
resizeScale /= 2; resizeScale /= 2;
cv::Mat img_resize; cv::Mat img_resize;
cv::resize(pDib, img_resize, cv::Size(), resizeScale, resizeScale, cv::INTER_LINEAR); cv::resize(pDib, img_resize, cv::Size(), resizeScale, resizeScale, cv::INTER_LINEAR);
cv::blur(img_resize, img_resize, cv::Size(3, 3)); //cv::dilate(img_resize, img_resize, cv::getStructuringElement(cv::MORPH_ELLIPSE, cv::Size(dilate, dilate)));
//cv::imwrite("img_resize.jpg", img_resize); cv::blur(img_resize, img_resize, cv::Size(dilate, dilate));
cv::Scalar bgc = hg::getBackGroundColor(img_resize, cv::Mat(), 20);
if (pDib.channels() == 3)
if ((bgc[0] + bgc[1] + bgc[2]) < meanTh * 3)
return false;
if (pDib.channels() == 1)
if (bgc[0] < meanTh )
return false;
//cv::imwrite(std::to_string(a) + "r.jpg", img_resize);
cv::Mat threshold_img; cv::Mat threshold_img;
if (img_resize.channels() == 3) if (img_resize.channels() == 3)
{ {
@ -74,19 +84,20 @@ bool CImageApplyDiscardBlank::apply(const cv::Mat& pDib, double threshold, int e
contour.push_back(p); contour.push_back(p);
cv::RotatedRect rect = hg::getBoundingRect(contour); cv::RotatedRect rect = hg::getBoundingRect(contour);
rect.size = cv::Size2f(rect.size.width - edge * resizeScale, rect.size.height - edge * resizeScale); rect.size = cv::Size2f(rect.size.width - edge * resizeScale * 2, rect.size.height - edge * resizeScale * 2);
cv::Point2f box[4]; cv::Point2f box[4];
rect.points(box); rect.points(box);
contour.clear(); contour.clear();
contours.clear(); contours.clear();
for (size_t i = 0; i < 4; i++) for (size_t i = 0; i < 4; i++)
contour.push_back(box[i]); contour.push_back(box[i]);
contours.push_back(contour); contours.push_back(contour);
cv::Mat mask = cv::Mat::zeros(img_resize.size(), CV_8UC1); cv::Mat mask = cv::Mat::zeros(img_resize.size(), CV_8UC1);
hg::fillPolys(mask, contours, cv::Scalar::all(255)); hg::fillPolys(mask, contours, cv::Scalar::all(255));
//cv::imwrite("mask.jpg", mask); //cv::imwrite(std::to_string(a) + "m.jpg", mask);
a++;
bool b = true; bool b = true;
if (img_resize.channels() == 3) if (img_resize.channels() == 3)
{ {
@ -94,11 +105,11 @@ bool CImageApplyDiscardBlank::apply(const cv::Mat& pDib, double threshold, int e
cv::split(img_resize, bgr); cv::split(img_resize, bgr);
for (size_t i = 0; i < 3; i++) for (size_t i = 0; i < 3; i++)
{ {
b &= maxMinCompare(bgr[i], mask, devTh, meanTh); b &= maxMinCompare(bgr[i], mask, devTh, bgc[i]);
if (!b) break; if (!b) break;
} }
} }
else else
b &= maxMinCompare(img_resize, mask, devTh, meanTh); b &= maxMinCompare(img_resize, mask, devTh, bgc[0]);
return b; return b;
} }

3
hgdriver/ImageProcess/ImageApplyDiscardBlank.h
View File

@ -27,7 +27,8 @@
2023/12/01 v1.8 取消JPEG/PNG文件大小判断空白页方案 2023/12/01 v1.8 取消JPEG/PNG文件大小判断空白页方案
2023/12/04 v1.9 提高算法效率。 2023/12/04 v1.9 提高算法效率。
2023/12/05 v1.9.1 修改错误代码；修改参数注释。 2023/12/05 v1.9.1 修改错误代码；修改参数注释。
* 版本号：v1.9.1 2023/12/08 v1.10 调整空白页判定条件。修复mask精度bug。
* 版本号：v1.10
* ==================================================== * ====================================================
*/ */