**Scalable Color**Descriptor: a color histogram in HSV color space. For example, Hue is divided into 8 fuzzy areas: (0) Red to Orange, (1) Orange, (2) Yellow, (3) Green, (4) Cyan, (5) Blue, (6) Magenta and (7) Blue to Red. S is divided into 2 fuzzy regions, The first area, in combination with the position of the pixel in channel V, is used to define if the color is clear enough to be ranked in one of the categories which are described in H histogram, or if it is a shade of white or gray color.

**Color Layout**:

**Edge Histogram**Descriptor: the filters for edges from different angles:

- vertical: [1 –1; 1 –1]
- horizontal: [1 1; –1 –1]
- 45 diagonal: [sqrt(2) 0; 0 -sqrt(2)]
- 135 diagonal: [0 sqrt(2); -sqrt(2) 0]
- non-directional: [2 –2; –2 2]

if (max < TEdge) EdgeHist[0]++; // no edge else // different direction if (m_nd > T0) EdgeHist[1]++; if (m_h > T1) EdgeHist[2]++; if (m_v > T1) EdgeHist[3]++; if (m_45 > T2) EdgeHist[4]++; if (m_135> T2) EdgeHist[5]++;

## No comments:

## Post a Comment