Finding paragraph bounding boxes

Aspose.OCR allows you to automatically find the coordinates of image rectangles containing text paragraphs. This can be useful for highlighting detected areas when previewing an image or extracting individual blocks of text.

To get bounding boxes of all paragraphs of the image, use one of the following functions:

Function	Description
asposeocr_get_rectangles_number()	Get the total number of paragraphs in the image.
asposeocr_get_rectangles_number_from_raw_bytes()	Get the total number of paragraphs in the image provided as an array of pixels.
asposeocr_get_rectangles_number_from_uri()	Get the total number of paragraphs in the image provided by URI. This function is not supported in the Linux version of Aspose.OCR for C++.
asposeocr_get_rectangles()	Get coordinates of all paragraph in the image. Make sure to use the same parameters as in asposeocr_get_rectangles_number() function.
asposeocr_get_rectangles_from_raw_bytes()	Get coordinates of all paragraph in the image provided as an array of pixels. Make sure to use the same parameters as in asposeocr_get_rectangles_number_from_raw_bytes() function.
asposeocr_get_rectangles_from_uri()	Get coordinates of all paragraph in the image provided by URI. Make sure to use the same parameters as in asposeocr_get_rectangles_number_from_uri() function. This function is not supported in the Linux version of Aspose.OCR for C++.

Set type parameter of the function to areas_type::paragraphs.

std::string image_path = "source.png";
// calculate the number of paragraphs
size_t res_len = asposeocr_get_rectangles_number(image_path.c_str(), areas_type::paragraphs, false);
std::wcout << "Number of paragraphs: " << res_len << std::endl;
// get paragraph bounding boxes
rect* rectangles = new rect[res_len];
res_len = asposeocr_get_rectangles(image_path.c_str(), areas_type::paragraphs, false, rectangles, res_len);
std::wcout << "Paragraphs: " << std::endl;
for (size_t i = 0; i < res_len; i++)
{
	std::wcout << " x: " << rectangles[i].x << " y: " << rectangles[i].y << " width: " << rectangles[i].width << " height: " << rectangles[i].height << std::endl;
}

Coordinates of each paragraph (top-left corner, width and height) are returned as an array of rect objects.