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Produce a color crop in addition to a grayscale crop of the license plate area

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This commit is contained in:
Matt Hill
2015-08-09 19:23:48 -04:00
parent 125cea00de
commit ce5e278053
1 changed files with 18 additions and 6 deletions
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22
src/openalpr/licenseplatecandidate.cpp
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@@ -71,18 +71,30 @@ namespace alpr
getTimeMonotonic(&startTime);
Mat originalCrop = pipeline_data->crop_gray;
// Compute the transformation matrix to go from the current image to the new plate corners
Transformation imgTransform(this->pipeline_data->grayImg, pipeline_data->crop_gray, expandedRegion);
Size cropSize = imgTransform.getCropSize(pipeline_data->plate_corners,
Size(pipeline_data->config->ocrImageWidthPx, pipeline_data->config->ocrImageHeightPx));
Mat transmtx = imgTransform.getTransformationMatrix(pipeline_data->plate_corners, cropSize);
pipeline_data->crop_gray = imgTransform.crop(cropSize, transmtx);
// Crop the plate corners from the original color image (after un-applying prewarp)
vector<Point2f> projectedPoints = pipeline_data->prewarp->projectPoints(pipeline_data->plate_corners, true);
pipeline_data->color_deskewed = Mat::zeros(cropSize, pipeline_data->colorImg.type());
std::vector<cv::Point2f> deskewed_points;
deskewed_points.push_back(cv::Point2f(0,0));
deskewed_points.push_back(cv::Point2f(pipeline_data->color_deskewed.cols,0));
deskewed_points.push_back(cv::Point2f(pipeline_data->color_deskewed.cols,pipeline_data->color_deskewed.rows));
deskewed_points.push_back(cv::Point2f(0,pipeline_data->color_deskewed.rows));
cv::Mat color_transmtx = cv::getPerspectiveTransform(projectedPoints, deskewed_points);
cv::warpPerspective(pipeline_data->colorImg, pipeline_data->color_deskewed, color_transmtx, pipeline_data->color_deskewed.size());
// Make a grayscale copy as well for faster processing downstream
cv::cvtColor(pipeline_data->color_deskewed, pipeline_data->crop_gray, CV_BGR2GRAY);
if (this->config->debugGeneral)
displayImage(config, "quadrilateral", pipeline_data->crop_gray);
displayImage(config, "quadrilateral", pipeline_data->color_deskewed);