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Improve histogram for 8 bit images

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This commit is contained in:
Dušan Poizl
2023-11-13 23:15:34 +01:00
parent 46b0210078
commit d462ece7c9
1 changed files with 3 additions and 2 deletions
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histogram.cpp
+3 -2
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@@ -40,7 +40,8 @@ void Histogram::paintEvent(QPaintEvent *)
uint64_t end =(i+1) * m_histogram.size() / w; uint64_t end =(i+1) * m_histogram.size() / w;
for(uint64_t o = start; o < end; o++) for(uint64_t o = start; o < end; o++)
sum += m_histogram[o]; sum += m_histogram[o];
m_points.push_back(sum); if(start != end)
m_points.push_back(sum);
} }
float scale = *std::max_element(m_points.begin(), m_points.end()); float scale = *std::max_element(m_points.begin(), m_points.end());
if(m_log) if(m_log)
@@ -57,7 +58,7 @@ void Histogram::paintEvent(QPaintEvent *)
points.push_back(QPointF(0, h)); points.push_back(QPointF(0, h));
for(size_t i = 0; i < m_points.size(); i++) for(size_t i = 0; i < m_points.size(); i++)
{ {
points.push_back(QPointF(i, h - m_points[i] * h)); points.push_back(QPointF((float)i * w / m_points.size(), h - m_points[i] * h));
} }
points.push_back(QPoint(w, h)); points.push_back(QPoint(w, h));
painter.setBrush(Qt::gray); painter.setBrush(Qt::gray);