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bugfix, config enhancement and 3 detection modes

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Former-commit-id: edfc3e7ccf7b7d727e73a8563acb521045026d5b
This commit is contained in:
wisc
2016-02-07 13:26:40 +01:00
parent 6b052081f7
commit 2b703de669
11 changed files with 213 additions and 60 deletions
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133
include/blackborder/BlackBorderDetector.h
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@@ -49,7 +49,7 @@ namespace hyperion
/// Constructs a black-border detector
/// @param[in] blackborderThreshold The threshold which the blackborder detector should use
///
BlackBorderDetector(uint8_t blackborderThreshold);
BlackBorderDetector(double threshold);
///
/// Performs the actual black-border detection on the given image
@@ -58,13 +58,17 @@ namespace hyperion
///
/// @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 ill check right and bottom sids
// center will check right and bottom sids
int width = image.width();
int height = image.height();
int width33percent = width / 3;
@@ -79,9 +83,9 @@ namespace hyperion
int firstNonBlackYPixelIndex = -1;
// find first X pixel of the image
for (int x = 0; x < width; ++x)
for (int x = 0; x < width33percent; ++x)
{
const Pixel_T & color1 = image( (width - x), yCenter); // right side center line check
const Pixel_T & color1 = image( (width - 1 - 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))
@@ -92,9 +96,9 @@ namespace hyperion
}
// find first Y pixel of the image
for (int y = 0; y < height; ++y)
for (int y = 0; y < height33percent; ++y)
{
const Pixel_T & color1 = image(xCenter, (height - y)); // bottom center line check
const Pixel_T & color1 = image(xCenter, (height - 1 - 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))
@@ -112,6 +116,120 @@ namespace hyperion
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 width66percent = width33percent * 2;
int height66percent = height33percent * 2;
// int xCenter = width / 2;
int yCenter = height / 2;
int firstNonBlackXPixelIndex = -1;
int firstNonBlackYPixelIndex = -1;
// find first X pixel of the image
int x;
for (x = 0; x < width33percent; ++x)
{
const Pixel_T & color1 = image( (width - 1 - 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, (height - 1 - y)); // left side bottom check
const Pixel_T & color2 = image(x, y );// left side top check
const Pixel_T & color3 = image( (width - 1 - x), y); // right side top check
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;
}
private:
///
@@ -131,5 +249,6 @@ namespace hyperion
private:
/// Threshold for the blackborder detector [0 .. 255]
const uint8_t _blackborderThreshold;
};
} // end namespace hyperion