parent
2e8c4ce7bc
commit
a0b41121e4
1 changed files with 6 additions and 6 deletions
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@ -180,9 +180,8 @@ static uint8_t otsu(const struct quirc *q)
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int numPixels = q->w * q->h;
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// Calculate histogram
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const int HISTOGRAM_SIZE = 256;
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unsigned int histogram[HISTOGRAM_SIZE];
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memset(histogram, 0, (HISTOGRAM_SIZE) * sizeof(unsigned int));
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unsigned int histogram[UINT8_MAX + 1];
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(void)memset(histogram, 0, sizeof(histogram));
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uint8_t* ptr = q->image;
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int length = numPixels;
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while (length--) {
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@ -191,8 +190,9 @@ static uint8_t otsu(const struct quirc *q)
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}
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// Calculate weighted sum of histogram values
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int sum = 0;
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for (int i = 0; i < HISTOGRAM_SIZE; ++i) {
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unsigned int sum = 0;
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unsigned int i = 0;
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for (i = 0; i <= UINT8_MAX; ++i) {
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sum += i * histogram[i];
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}
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@ -201,7 +201,7 @@ static uint8_t otsu(const struct quirc *q)
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int q1 = 0;
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double max = 0;
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uint8_t threshold = 0;
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for (int i = 0; i < HISTOGRAM_SIZE; ++i) {
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for (i = 0; i <= UINT8_MAX; ++i) {
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// Weighted background
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q1 += histogram[i];
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if (q1 == 0)
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