/// <summary>Finds ROI in a video.</summary>
/// <param name="mask_finder_path">Path to find_ruler model file.</param>
/// <param name="vid_path">Path to the video.</param>
/// <param name="roi">Rect specifying the ROI.</param>
/// <param name="endpoints">Ruler endpoints. </param>
static void FindVideoRoi(
string mask_finder_path,
string vid_path,
out Rect roi,
out PointPair endpoints)
{
// Determined by experimentation with GPU having 8GB memory.
const int kMaxImg = 8;
// Create and initialize the mask finder.
RulerMaskFinder mask_finder = new RulerMaskFinder();
ErrorCode status = mask_finder.Init(mask_finder_path);
if (status != ErrorCode.kSuccess)
{
throw new Exception("Failed to initialize mask finder!");
}
// Decode the first 100 frames and find the mask that corresponds
// to the largest ruler area.
VideoReader reader = new VideoReader();
status = reader.Init(vid_path);
if (status != ErrorCode.kSuccess)
{
throw new Exception("Failed to open video!");
}
VectorImage masks = new VectorImage();
Image best_mask = new Image();
double max_mask_sum = 0.0;
bool vid_end = false;
for (int i = 0; i < 100 / kMaxImg; ++i)
{
for (int j = 0; j < kMaxImg; ++j)
{
Image img = new Image();
status = reader.GetFrame(img);
if (status != ErrorCode.kSuccess)
{
vid_end = true;
break;
}
status = mask_finder.AddImage(img);
if (status != ErrorCode.kSuccess)
{
throw new Exception("Failed to add frame to mask finder!");
}
}
status = mask_finder.Process(masks);
if (status != ErrorCode.kSuccess)
{
throw new Exception("Failed to process mask finder!");
}
foreach (var mask in masks)
{
double mask_sum = mask.Sum()[0];
if (mask_sum > max_mask_sum)
{
max_mask_sum = mask_sum;
best_mask = mask;
}
}
if (vid_end)
{
break;
}
}
// Now that we have the best mask, use this to compute ROI.
best_mask.Resize(reader.Width(), reader.Height());
endpoints = openem.RulerEndpoints(best_mask);
Image r_mask = openem.Rectify(best_mask, endpoints);
roi = openem.FindRoi(r_mask);
}
/// <summary>
/// Main program.
/// </summary>
static int Main(string[] args)
{
// Check input arguments.
if (args.Length < 2)
{
Console.WriteLine("Expected at least two arguments:");
Console.WriteLine(" Path to protobuf file containing model");
Console.WriteLine(" Paths to one or more image files");
return(-1);
}
// Create and initialize the mask finder.
RulerMaskFinder mask_finder = new RulerMaskFinder();
ErrorCode status = mask_finder.Init(args[0]);
if (status != ErrorCode.kSuccess)
{
Console.WriteLine("Failed to initialize ruler mask finder!");
return(-1);
}
// Load in images.
VectorImage imgs = new VectorImage();
for (int i = 1; i < args.Length; i++)
{
Image img = new Image();
status = img.FromFile(args[i]);
if (status != ErrorCode.kSuccess)
{
Console.WriteLine("Failed to load image {0}!", args[i]);
return(-1);
}
imgs.Add(img);
}
// Add images to processing queue.
foreach (var img in imgs)
{
status = mask_finder.AddImage(img);
if (status != ErrorCode.kSuccess)
{
Console.WriteLine("Failed to add image for processing!");
return(-1);
}
}
// Process the loaded images.
VectorImage masks = new VectorImage();
status = mask_finder.Process(masks);
if (status != ErrorCode.kSuccess)
{
Console.WriteLine("Failed to process images!");
return(-1);
}
for (int i = 0; i < masks.Count; ++i)
{
// Resize the masks back into the same size as the images.
masks[i].Resize(imgs[i].Width(), imgs[i].Height());
// Check if the ruler is present.
bool present = openem.RulerPresent(masks[i]);
if (!present)
{
Console.WriteLine("Could not find ruler in image! Skipping...");
continue;
}
// Find orientation and region of interest based on the mask.
PointPair endpoints = new PointPair();
endpoints = openem.RulerEndpoints(masks[i]);
Image r_mask = openem.Rectify(masks[i], endpoints);
Rect roi = openem.FindRoi(r_mask);
// Rectify, crop, and display the image.
Image r_img = openem.Rectify(imgs[i], endpoints);
Image c_img = openem.Crop(r_img, roi);
c_img.Show();
}
return(0);
}