The chain code was replaced by the shape signature and used to express the contour, improve the speed and decrease the effect of noise and transformation due to camera calibration.

在特征表示方面，用形状签名代替链码来描述轮廓，从而提高了计算速度，降低了由噪声干扰和镜头形变造成的影响。

youdao

Founded in Leicester in 1935 by Frank Jessop, the camera chain became the first High Street casualty of 2013.

BBC: Jessops brand sold to Dragons' Den's Peter Jones

The camera chain was founded in Leicester in 1935 by Frank Jessop.

BBC: Jessops camera stores to close with loss of 1,370 jobs

Earlier in the week camera chain Jessops announced that jobs were to be lost at its head office in Leicester, after administrators were appointed.

BBC: Waitrose ends Bardon distribution centre contract