mirror of
https://github.com/hyperion-project/hyperion.ng.git
synced 2023-10-10 13:36:59 +02:00
263 lines
7.6 KiB
C++
263 lines
7.6 KiB
C++
//#include <iostream>
|
|
#pragma once
|
|
|
|
// Utils includes
|
|
#include <utils/Image.h>
|
|
|
|
namespace hyperion
|
|
{
|
|
///
|
|
/// Result structure of the detected blackborder.
|
|
///
|
|
struct BlackBorder
|
|
{
|
|
/// Falg indicating if the border is unknown
|
|
bool unknown;
|
|
|
|
/// The size of the detected horizontal border
|
|
int horizontalSize;
|
|
|
|
/// The size of the detected vertical border
|
|
int verticalSize;
|
|
|
|
///
|
|
/// Compares this BlackBorder to the given other BlackBorder
|
|
///
|
|
/// @param[in] other The other BlackBorder
|
|
///
|
|
/// @return True if this is the same border as other
|
|
///
|
|
inline bool operator== (const BlackBorder& other) const
|
|
{
|
|
if (unknown)
|
|
{
|
|
return other.unknown;
|
|
}
|
|
|
|
return other.unknown==false && horizontalSize==other.horizontalSize && verticalSize==other.verticalSize;
|
|
}
|
|
};
|
|
|
|
///
|
|
/// The BlackBorderDetector performs detection of black-borders on a single image.
|
|
/// The detector will search for the upper left corner of the picture in the frame.
|
|
/// Based on detected black pixels it will give an estimate of the black-border.
|
|
///
|
|
class BlackBorderDetector
|
|
{
|
|
public:
|
|
///
|
|
/// Constructs a black-border detector
|
|
/// @param[in] blackborderThreshold The threshold which the blackborder detector should use
|
|
///
|
|
BlackBorderDetector(double threshold);
|
|
|
|
///
|
|
/// Performs the actual black-border detection on the given image
|
|
///
|
|
/// @param[in] image The image on which detection is performed
|
|
///
|
|
/// @return The detected (or not detected) black border info
|
|
///
|
|
|
|
uint8_t calculateThreshold(double blackborderThreshold);
|
|
|
|
///
|
|
/// default detection mode (3lines 4side detection)
|
|
template <typename Pixel_T>
|
|
BlackBorder process(const Image<Pixel_T> & image)
|
|
{
|
|
// test center and 33%, 66% of width/heigth
|
|
// 33 and 66 will check left and top
|
|
// center will check right and bottom sids
|
|
int width = image.width();
|
|
int height = image.height();
|
|
int width33percent = width / 3;
|
|
int height33percent = height / 3;
|
|
int width66percent = width33percent * 2;
|
|
int height66percent = height33percent * 2;
|
|
int xCenter = width / 2;
|
|
int yCenter = height / 2;
|
|
|
|
|
|
int firstNonBlackXPixelIndex = -1;
|
|
int firstNonBlackYPixelIndex = -1;
|
|
|
|
width--; // remove 1 pixel to get end pixel index
|
|
height--;
|
|
|
|
// find first X pixel of the image
|
|
for (int x = 0; x < width33percent; ++x)
|
|
{
|
|
const Pixel_T & color1 = image( (width - x), yCenter); // right side center line check
|
|
const Pixel_T & color2 = image(x, height33percent);
|
|
const Pixel_T & color3 = image(x, height66percent);
|
|
if (!isBlack(color1) || !isBlack(color2) || !isBlack(color3))
|
|
{
|
|
firstNonBlackXPixelIndex = x;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// find first Y pixel of the image
|
|
for (int y = 0; y < height33percent; ++y)
|
|
{
|
|
const Pixel_T & color1 = image(xCenter, (height - y)); // bottom center line check
|
|
const Pixel_T & color2 = image(width33percent, y );
|
|
const Pixel_T & color3 = image(width66percent, y);
|
|
if (!isBlack(color1) || !isBlack(color2) || !isBlack(color3))
|
|
{
|
|
firstNonBlackYPixelIndex = y;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Construct result
|
|
BlackBorder detectedBorder;
|
|
detectedBorder.unknown = firstNonBlackXPixelIndex == -1 || firstNonBlackYPixelIndex == -1;
|
|
detectedBorder.horizontalSize = firstNonBlackYPixelIndex;
|
|
detectedBorder.verticalSize = firstNonBlackXPixelIndex;
|
|
return detectedBorder;
|
|
}
|
|
|
|
|
|
///
|
|
/// classic detection mode (topleft single line mode)
|
|
template <typename Pixel_T>
|
|
BlackBorder process_classic(const Image<Pixel_T> & image)
|
|
{
|
|
// only test the topleft third of the image
|
|
int width = image.width() /3;
|
|
int height = image.height() / 3;
|
|
int maxSize = std::max(width, height);
|
|
|
|
int firstNonBlackXPixelIndex = -1;
|
|
int firstNonBlackYPixelIndex = -1;
|
|
|
|
// find some pixel of the image
|
|
for (int i = 0; i < maxSize; ++i)
|
|
{
|
|
int x = std::min(i, width);
|
|
int y = std::min(i, height);
|
|
|
|
const Pixel_T & color = image(x, y);
|
|
if (!isBlack(color))
|
|
{
|
|
firstNonBlackXPixelIndex = x;
|
|
firstNonBlackYPixelIndex = y;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// expand image to the left
|
|
for(; firstNonBlackXPixelIndex > 0; --firstNonBlackXPixelIndex)
|
|
{
|
|
const Pixel_T & color = image(firstNonBlackXPixelIndex-1, firstNonBlackYPixelIndex);
|
|
if (isBlack(color))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
// expand image to the top
|
|
for(; firstNonBlackYPixelIndex > 0; --firstNonBlackYPixelIndex)
|
|
{
|
|
const Pixel_T & color = image(firstNonBlackXPixelIndex, firstNonBlackYPixelIndex-1);
|
|
if (isBlack(color))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Construct result
|
|
BlackBorder detectedBorder;
|
|
detectedBorder.unknown = firstNonBlackXPixelIndex == -1 || firstNonBlackYPixelIndex == -1;
|
|
detectedBorder.horizontalSize = firstNonBlackYPixelIndex;
|
|
detectedBorder.verticalSize = firstNonBlackXPixelIndex;
|
|
return detectedBorder;
|
|
}
|
|
|
|
|
|
///
|
|
/// osd detection mode (find x then y at detected x to avoid changes by osd overlays)
|
|
template <typename Pixel_T>
|
|
BlackBorder process_osd(const Image<Pixel_T> & image)
|
|
{
|
|
// find X position at height33 and height66 we check from the left side, Ycenter will check from right side
|
|
// then we try to find a pixel at this X position from top and bottom and right side from top
|
|
int width = image.width();
|
|
int height = image.height();
|
|
int width33percent = width / 3;
|
|
int height33percent = height / 3;
|
|
int height66percent = height33percent * 2;
|
|
int yCenter = height / 2;
|
|
|
|
|
|
int firstNonBlackXPixelIndex = -1;
|
|
int firstNonBlackYPixelIndex = -1;
|
|
|
|
width--; // remove 1 pixel to get end pixel index
|
|
height--;
|
|
|
|
// find first X pixel of the image
|
|
int x;
|
|
for (x = 0; x < width33percent; ++x)
|
|
{
|
|
const Pixel_T & color1 = image( (width - x), yCenter); // right side center line check
|
|
const Pixel_T & color2 = image(x, height33percent);
|
|
const Pixel_T & color3 = image(x, height66percent);
|
|
if (!isBlack(color1) || !isBlack(color2) || !isBlack(color3))
|
|
{
|
|
firstNonBlackXPixelIndex = x;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// find first Y pixel of the image
|
|
for (int y = 0; y < height33percent; ++y)
|
|
{
|
|
const Pixel_T & color1 = image(x, y );// left side top check
|
|
const Pixel_T & color2 = image(x, (height - y)); // left side bottom check
|
|
const Pixel_T & color3 = image( (width - x), y); // right side top check
|
|
const Pixel_T & color4 = image( (width - x), (height - y)); // right side bottom check
|
|
if (!isBlack(color1) || !isBlack(color2) || !isBlack(color3) || !isBlack(color4))
|
|
{
|
|
// std::cout << "y " << y << " lt " << int(isBlack(color1)) << " lb " << int(isBlack(color2)) << " rt " << int(isBlack(color3)) << " rb " << int(isBlack(color4)) << std::endl;
|
|
firstNonBlackYPixelIndex = y;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Construct result
|
|
BlackBorder detectedBorder;
|
|
detectedBorder.unknown = firstNonBlackXPixelIndex == -1 || firstNonBlackYPixelIndex == -1;
|
|
detectedBorder.horizontalSize = firstNonBlackYPixelIndex;
|
|
detectedBorder.verticalSize = firstNonBlackXPixelIndex;
|
|
return detectedBorder;
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
///
|
|
/// Checks if a given color is considered black and therefor could be part of the border.
|
|
///
|
|
/// @param[in] color The color to check
|
|
///
|
|
/// @return True if the color is considered black else false
|
|
///
|
|
template <typename Pixel_T>
|
|
inline bool isBlack(const Pixel_T & color)
|
|
{
|
|
// Return the simple compare of the color against black
|
|
return color.red < _blackborderThreshold && color.green < _blackborderThreshold && color.blue < _blackborderThreshold;
|
|
}
|
|
|
|
private:
|
|
/// Threshold for the blackborder detector [0 .. 255]
|
|
const uint8_t _blackborderThreshold;
|
|
|
|
};
|
|
} // end namespace hyperion
|