基于三维人脸模型装配的表情驱动算法

为了实现三维人脸模型中的面部表情控制，本文提出了一种基于人脸模型装配的表情驱动方法。该方法利用FACS编码系统计算出各动作单元AU对应的表情基参数，结合生物解剖学与运动学的相关知识，将肌肉与骨骼装配到三维人脸模型上，通过驱动控制点完成面部的表情驱动。与传统基于手工建模或数据驱动方法相比，本方法不需要大量的人工参与和训练数据。因此，该方法在数字娱乐、虚拟人物和人机交互等领域有着广泛的应用前景，为相关领域的研究和应用提供了一定的参考。     

不同匹配方式对IGRT摆位精度的影响

目的:探讨放射治疗IGRT应用中不同匹配方式对治疗摆位精度的影响。方法:对10名头面部肿瘤患者和10名食管肿瘤患者分别采用对同一患者,在图像采集条件和方法、图像匹配区域、图像重建模式相同的条件下,观察20次重复摆位后,用CBCT采集图像信息,通过XVI系统分别采用骨和灰度两种模式与参考图像匹配得出数据,观察两种匹配方式对摆位精度的影响。结果:X、Y、Z三个方向上两组误差差异较大,在对头面部和食管肿瘤患者使用IGRT进行治疗时,图像匹配采用骨模式精度高。结论:对头面部肿瘤和食管肿瘤采用IGRT治疗时用骨匹配比用灰度匹配精度高。     

基于MeanShift和Harris算子圆网印花机对花检测的研究与设计

为了实现基于智能相机的圆网印花自动对花系统,本文提出了基于均值漂移(MeanShift)算法的彩色印花图案分割技术和基于Harris角点检测的块匹配算法。将扩展形式的均值漂移算法用于印花图案的分割,实验证明该算法能对印花图像进行良好的分割。把已分割标准图像的各套色区域提取出来,采用Harris算子进行特征点检测,并以这些特征点为中心,选定标准匹配块,在处理好的实时采集的图像中找到最佳匹配块,计算对花误差。通过仿真和实验验证算法是可行性的,为实现在线对花检测闭环控制打下基础。     

半监督特征重构的无约束条件下人脸表情识别方法

针对无约束条件下人脸表情数据的标签不足问题，本文提出了半监督特征重构的人脸表情识别方法。首先，构建了多头卷积神经网络，每个卷积头倾向于提取不同的特征，以丰富特征多样性；其次，使用五官关键点坐标构建结果用于提取局部特征的关键特征分支；再次，构建了自训练重采样模块，利用少数类的高精度预测补充标签数量；最后，使用一致性正则损失和伪标签方法学习无标签数据。分别在包含400个标签的RAF-DB和FERPlus数据集和包含250个标签的CIFAR-10数据集上进行测试，实验结果表明，所提方法的识别率分别达到68.88%、77.38%和95.75%,方法优于经典的半监督学习方法。     

一种新的用于图像稳定的特征点检测方法

二维特征点的检测和提取是进行图像配准、目标识别和运动匹配的关键技术。针对不同的后继任务, 检测和提取的方法也有所不同。在多目标跟踪和识别技术中, 图像稳定是必要的处理过程, 而如何找到对应的特征点则是其难点所在。本文基于Gabor小波变换, 提出了一种新的分散型自适应策略。该方法能够迅速、有效地在前后两帧图像中找出可能的对应特征点, 以便进行特征点匹配, 从而完成图像稳定。实验表明, 本文方法检测到的特征点能够确切代表两帧图像间的运动情况, 从而为图像稳定提供了可靠的基础。     

长期面瘫,笑容重现

什么是长期面瘫?面瘫患者有多痛苦?长期面瘫患者怎样才能笑容重现?面部表情是面神经指挥面肌正常工作呈现出来的.如果面神经或面肌损伤了,面部表情就会出现异常,例如无法笑、不能闭眼、无法抬眉等,晚期面瘫患者还会逐渐发展到面部严重下垂,不仅外观不好看,患者还会感到坠胀难受、吃东西困难.面瘫的原因有很多,病毒感染导致的面神经炎、外伤、面神经相关肿瘤都是最常见原因.一般来说,面瘫超过3年面部表情还没有恢复,面部肌肉就会出现一定程度的萎缩,这就是长期面瘫.长期面瘫患者没有恢复正常表隋通常是面神经没有修复或发生了严重的面肌萎缩.     

立体视频的4维矩阵DCT编码算法

基于4维矩阵DCT变换理论提出了一种有效的立体视频编码方法。通常的方法是对每个立体对都进行视差估计和运动估计，该论文的方法采用4维矩阵DCT变换去除双目图像数据间的冗余，因此只需进行三分之一的运动估计计算而不需做任何视差估计。第一个立体对被称为“I立体对”，接下来的每三个相邻的立体对被称为一个“P立体对”，并且以4维单元的形式进行保存。仅对“P立体对”的中间时刻的块进行运动估计，中间时刻的运动矢量被视为4维单元的统一的运动矢量来计算运动补偿。然后，用4维矩阵DCT变换进一步的去除时域和空域上的冗余性。实验结果表明在计算复杂度大大降低的情况下该方法可以得到较好的编码性能。     

视频压缩中的运动估计算法

通过研究视频压缩算法,归纳分析了MVFAST、PMVFAST和UMHexagonS算法各自的优缺点,在此基础上给出了一种改进的基于块匹配的运动估计算法。改进算法充分利用视频图像的运动矢量中心偏移特性、分布特性和相关性特点,设计并使用了类圆形和小菱形两种模板,在搜索过程中采用组合模板进行灵活处理,提高了块匹配的搜索速度,缩短了运动估计时间。实验结果表明,改进算法在保持图像质量的同时,有效减少了视频编码时间。     

基于SURF特征的目标跟踪

本文利用SURF特征进行目标跟踪,通过匹配模板图像和视频序列中各个运动对象的SURF特征确定目标位置.文中用于目标匹配的特征是图像中的局部性特征,具有尺度不变性和旋转不变性,对缩放、小视角改变、噪声、亮度变化具有很好的适应性.实验表明该方法是一种简洁有效的目标跟踪识别方法.     

80例老年头面部恶性肿瘤临床分析

目的：探讨老年头面部恶性肿瘤的临床特点及治疗措施。方法回顾性分析80例老年头面部恶性肿瘤患者的临床资料。结果80例患者中,男49例,女31例,男女比例1.58：1;年龄61~86岁,中位年龄68岁;发生于头皮16例,面颊19例,前额19例,鼻翼14例,眼睑12例;基底细胞癌42例（52.5％）,鳞状细胞癌33例（41.2％）,Bowen病5例（6.3％）;49例采用外科手术治疗,21例采用外科手术配合光动力治疗,10例单独使用光动力治疗,1 a随访期内均未复发。结论老年头面部恶性肿瘤发生率较高,且表现形式多种多样,易引起漏诊和误诊,临床医生应提高对头面部肿瘤的警惕性;外科手术配合光动力治疗头面部恶性肿瘤具有较好疗效。     

Unilateral facial pain and lung cancer

The symptom of unilateral facial pain as a non-metastatic presentation of lung cancer is rare. This report describes a patient in whom unilateral face pain preceded the diagnosis of lung cancer by 9 months. The neural mechanism of this syndrome is discussed and the literature reviewed.     

Bilateral facial nerve palsy secondary to the administration of high-dose paclitaxel

Bilateral facial nerve palsy is an uncommon occurrence. We describe a case of bilateral facial nerve palsy secondary to a single cycle of high-dose paclitaxel therapy (825 mg/m²), in a woman with breast cancer. Prior to her high-dose therapy, she had a residual grade 2 peripheral neuropathy following treatment with ten cycles of standard-dose paclitaxel (total dose 3200 mg). The features of the peripheral neuropathy due to standard-dose paclitaxel, which can be both motor and sensory, are well described. Cumulative paclitaxel dose is considered a risk factor for development of the neuropathy. Although facial nerve palsy secondary to paclitaxel is not previously reported, other cranial nerve toxicity has been described. Consistent with reports of the reversibility of paclitaxel-induced peripheral neuropathy, the facial nerve palsies in our patient resolved over 23 months. Ongoing studies of high-dose paclitaxel warrant close attention to its cumulative neurotoxic effects, particularly in patients previously treated with neurotoxic chemotherapy.     

Lymphoedema following treatment for head and neck cancer: impact on patients,and beliefs of health professionals

Cervicofacial lymphoedema is a recognised side‐effect that may result following treatment for head and neck cancer. This study aimed to investigate the perspectives of affected patients and the beliefs that treating health professionals hold about head and neck lymphoedema. Ten patients with head and neck lymphoedema and 10 health professionals experienced in the treatment of head and neck cancer patients agreed to participate in semi‐structured face to face interviews. Interviews were recorded, audio files were transcribed and coded and then analysed for themes. Themes of experiences of patients with head and neck lymphoedema and the beliefs of health professionals largely overlapped. Given its visible deformity, the main effect of lymphoedema in head and neck cancer patients was on appearance. In some cases this lead to negative psychosocial sequelae such as reduced self‐esteem, and poor socialisation. Clinicians need to be aware of those patients more likely to experience lymphoedema following treatment for head and neck cancer, and how they are affected. Understanding how patients with facial lymphoedema are affected psychologically and physically, and the importance of prompt referral for lymphoedema treatment, might ultimately improve outcomes and ensure optimal management.     

腮腺内面神经鞘瘤12例临床病理分析

目的 :分析腮腺内面神经鞘瘤的临床、病理特点 ,以免误诊、误治。方法 :对山东省莱阳中心医院 2 0年间收治的 12例腮腺内面神经鞘瘤的临床、病理特点 ,进行回顾性分析。结果 :6例术前误诊为混合瘤 ,1例误诊为腺样囊性癌 ,1例误诊为淋巴瘤。 2例做了穿刺活检 ,3例做了术中快速病检 ,皆得以确诊。术中保留面神经的 10例 ,虽然术后出现面瘫 ,但于术后 6～ 12月恢复 ,切除面神经颅外段 2例 ,面瘫未见恢复。本组 5例肿瘤来源于面神经总干 ,3例来源于上、下颊支 ,2例来源于颧支 ,2例来源于下颌缘支。肿瘤镜下分型 :囊状型 9例 ,网状型 3例。术后随访 5～ 10年 ,无 1例复发。结论 :此瘤极易误诊 ,确诊有赖于术前 (或术后 )病理检查。术中应尽力保留面神经 ,虽然术中刺激、牵拉面神经等致术后面瘫 ,但大多数患者可自然恢复     

Gender differences in facial expression recognition in survivors of pediatric brain tumors

Objective: To examine the relation between gender, history of cranial radiation therapy (CRT) and facial expression recognition (FER) skill in survivors of pediatric brain tumors. Methods: Fifty‐three survivors (27 females) completed a measure of FER and an intelligence test. Results: There was a significant interaction between gender and CRT on ability to interpret low‐intensity facial expressions, such that females who had not had CRT made fewer errors than either females who had CRT or males. Conclusion: A history of CRT has a notable effect on FER skill in females: girls who received CRT performed significantly more poorly than girls who did not. Copyright © 2008 John Wiley & Sons, Ltd.     

Pityriasis versicolor of the face

Pityriasis versicolor (p.v.) is a superficial mycosis occurring frequently on the face. Epidemiological and clinical data regarding cases of p.v. on the face over a period of 11 years are discussed and some explanation given for conditions which favour facial involvement. This study underlines that face lesions of p.v. are more common in children than in adults and in females than in males. The forehead is the site of facial involvement usually affected. Clinical features are variable but we often observed achromic or hypopigmented scaling lesions, smaller than trunk patches.     

腮腺肿瘤再手术时面神经的处理

目的探讨腮腺肿瘤再次手术时面神经的处理。方法对近6年来我院收治的36例腮腺肿瘤术后复发，再次手术时面神经的处理方式，进行回顾性分析总结。其中7例有2次以上腮腺肿瘤手术史，有病理记载恶性者9例，有面瘫者5例。结果再手术行腮腺浅叶加肿瘤切除22例，均保留神经。行全腮腺切除14例，其中5例切除面神经。术后病理报告恶性者11例。结论对良性病例术中应保留面神经。对恶性病例，再次手术时对面神经是否保留，不能以肿瘤大小而定，而应根据病理分类、肿瘤与面神经粘连程度而定。恶性病例术后行综合治疗。     

Silent intratemporal facial nerve schwannoma associated with Chronic Suppurative Otitis Media: A rare presentation

Facial palsy is a common manifestation of intratemporal facial nerve schwannoma. Review of English literature describes intratemporal facial nerve schwannoma presenting as vertigo, tinnitus (without facial palsy) which were diagnosed on CT scan or MRI of temporal bone. We are presenting two cases of asymptomatic facial nerve schwannoma without facial palsy presenting only as Chronic Suppurative Otitis Media (CSOM), which were diagnosed incidentally during surgery.     

腮腺肿瘤手术20例临床分析

目的探讨腮腺肿瘤的手术方式、手术范围及预后。方法对1998--2004年间行解剖面神经的腮腺肿瘤切除术20例临床随访资料进行分析。结果腮腺浅叶切除术13例中,并发腮瘘1例;全腺叶切除术7例中,并发暂时性面瘫1例,无Frey综合征。随访10个月至6年无复发。结论腮腺良性肿瘤需行解剖面神经的浅叶及肿瘤切除术或全腮腺切除术;恶性肿瘤在面神经未受累时行保留面神经的腮腺全切术,术后辅以放疗,可以减少肿瘤复发和面瘫等并发症。     

The bony crescent sign -a new sign of facial nerve schwannoma

Schwannomas of the facial nerve are rare slowly growing lesions that have a predilection for the geniculate ganglion. Radiological evaluation is important in their diagnosis and in the assessment of their extent. In our series of 4 cases the facial nerve schwannoma was seen on high resolution CT as a soft tissue mass bounded anteriorly by a thin rim of bone. This bony crescent sign is a previously undescribed sign of facial nerve schwannoma which appears on the basis of this small series to be strongly indicative of the presence of this tumour. Schwannomas are relatively uncommon intracranial tumours. They most commonly involve the acoustic nerve followed in frequency by the trigeminal nerve. Other cranial nerves are rarely involved. Facial nerve schwannomas occur ring within the petrous temporal bone are very rare. Their diagnosis may be missed prospectively even when appropriate CT scans are per formed. Even in retrospect the site of abnormality may be difficult to identify, especially if there is an associated middle ear mass such as a cholesteatoma. Lesions occurring in the petrous area are all rare. The differential diagnosis includes cholesterol granuloma, epidermoid, carotid aneurysm and, very rarely, primary and secondary bone tumours. We describe a new sign associated with facial nerve schwannoma on CT, that of a bony crescent. Recognition of this sign makes those tumours arising in the region of the geniculate ganglion easy to diagnose prospectively.