annotation example details

[DecentMakeover]

In the annotation example,

` 261

138

        <x2>284</x2>
        <y2>140</y2>
        <x3>279</x3>
        <y3>158</y3>
        <x4>260</x4>
        <y4>158</y4>
        <xmin>260</xmin>
        <ymin>138</ymin>
        <xmax>284</xmax>

158` The first eight boxes i understand, bounding box co-ordinates of the image. Im not able to figure out what the next 4 items are , The xmin,xmax,ymin,ymax. Any help understanding the annotation example might be helpful,Thanks

[MhLiao]

The (xmin,xmax,ymin,ymax) is the axis-aligned bounding box (minimum horizontal rectangle that cover the quadrilateral).