Coursera.MachineLearning.Week11

Machine Learning Week11 : Photo OCR

Application Example : Photo OCR

1. Photo OCR

1.1 Problem Description and Pipeline

Photo OCR pipeline

1.2 Sliding Windows

Pedestrian detection框的宽高比类似 Supervised Learning for pedestrain detection Sliding window detection. 每次需要resize到输入的固定大小 Text detection. Expansion Character segmentation

1.3 Getting Lots of Data and Artificial Data

人工合成数据 通过变形原样本扩大数据集 加入噪声 一般图像加入噪声不能改进效果 获取更多的数据

1.4 Ceiling Analysis : What part of the Pipeline to Work on Next (上限分析)

Ceiling Analysis Another Ceiling Analysis example Question.1

2. Summary

Main topics