The registration image accords with projection model to ensure that the registration image is real.
依据投影模型进行图像对齐，保证其真实性；
A model of grads area projection curve is built to verify face candidate.
建立了梯度面积投影曲线模型，用于候选人脸的校验。
A model of grads area projection curve is built to verify face candidate.
建立了梯度面积投影曲线模型，用于候选人脸的校验。
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