Exemplos de scoped_ptr::Next em C++ (Cpp)

Exemplo n.º 1

Arquivo: compute_image_mean.cpp Projeto: seasky100/caffe_ocr

vector<double> GetChannelMean(scoped_ptr<db::Cursor>& cursor)
{
	vector<double> meanv(3, 0);

	int count = 0;
	LOG(INFO) << "Starting Iteration";
	while (cursor->valid()) {
		Datum datum;
		datum.ParseFromString(cursor->value());
		DecodeDatumNative(&datum);

		const std::string& data = datum.data();
		int w = datum.width(), h = datum.height();
		int ch = datum.channels();
		int dim = w*h;
		double chmean[3] = { 0,0,0 };
		for (int i = 0; i < ch;i++)
		{
			int chstart = i*dim;
			for (int j = 0; j < dim;j++)
				chmean[i] += (uint8_t)data[chstart+j];
			chmean[i] /= dim;
		}
		if (ch == 1)
		{
			meanv[0] += chmean[0];
			meanv[1] += chmean[0];
			meanv[2] += chmean[0];
		}
		else
		{
			meanv[0] += chmean[0];
			meanv[1] += chmean[1];
			meanv[2] += chmean[2];
		}
		
		++count;
		if (count % 10000 == 0) {
			LOG(INFO) << "Processed " << count << " files.";
		}
		cursor->Next();
	}

	if (count % 10000 != 0) {
		LOG(INFO) << "Processed " << count << " files.";
	}

	for (int c = 0; c < 3; ++c) {
		LOG(INFO) << "mean_value channel [" << c << "]:" << meanv[c] / count;
	}

	return meanv;
}