using (var api = OcrApi.Create())
{
	api.Init(Languages.English);
	using (var renderer = OcrPdfRenderer.Create(@"D:\4\output_pdf", @"tessdata"))
	{
		renderer.BeginDocument("Title");
		var image = Image.FromFile(@"D:\4\1_JPEG.tif");
		var pages = image.GetFrameCount(FrameDimension.Page);

		for (int index = 0; index < pages; index++)
		{
			image.SelectActiveFrame(FrameDimension.Page, index);
			using (var bmp = new Bitmap(image.Width, image.Height))
			{
				using (var g = Graphics.FromImage(bmp))
				{
					g.DrawImage(image, 0, 0, image.Width, image.Height);
				}

				using (var pix = OcrPix.FromBitmap(bmp))
				{
					api.ProcessPage(pix, null, 0, renderer);
				}
			}
		}
		renderer.EndDocument();
	}
}