A hands-on comparison of Hasselblad X1D medium format vs full frame cameras: image quality advantages exist, but speed and usability issues make full frame more practical for most users.
Articles by grapeot
Photography and optics
Connecting photography concepts with optics: glasses diopter equals 1/focal length, aperture affects depth of field and diffraction, and macro lens design for close focusing.
Gigapixel Panoramas
Creating gigapixel panoramas with Leica SL and vintage R lenses: from Seattle skyline to macro photography of watches and dollar bills, with tips for successful stitching.
能理解聊天记录的微信机器人(三)
基于Caffe的斗图机器人：用深度学习提取表情特征，在数据库中找最近邻实现自动回复，效果意外地好但也暴露了ImageNet预训练模型在二次元表情上的局限。
能理解聊天记录的微信机器人(二)
微信机器人功能升级：群标签云统计、个人发言分析、活跃度可视化，并接入ElasticSearch和Kibana实现实时监控，算法从TF升级到TF-IDF。