A公司camera IQ 职位面试题

maver

前几天一个同事面试A公司在硅谷的IQ 职位，从面试的问题可以看出A公司与以前公众号说过的G公司类似，对工程师基础知识的掌握能力非常重视，做产品的经验是可以逐渐获得的，但是基础如果不好，那就很难培养成一个合格的工程师。

1. What's FPN, how to measure FPN noise --------sensor 基础
2. What's color shading, what causes color shading ? -----optics
3. Why is color error calculated in LAB color space ? -----color science
4. What's noise profile, what are the use cases of noise profile in ISP. ------ISP signal processing
5. Describe various MTF metrics and how to calculate MTF in each way ------optics and algorithm
6. What's the cause of LCA and ACA, what's the visual difference between them. -------optics.
7. How to transfer cycle/ Pixel to Cycle/ Rad.  -------------------------------------------------optics.
8. List IQ test chart and usage. -------------------------------------------------------------------Image quality     

cheerful508

很有启发意义

wisher

6. What's the cause of LCA and ACA, what's the visual difference between them. -------optics.
7. How to transfer cycle/ Pixel to Cycle/ Rad.  -------------------------------------------------optics.
这两个题目没理解，是否可以解答一下

maver

wisher 发表于 2019-11-27 16:05
6. What's the cause of LCA and ACA, what's the visual difference between them. -------optics.
7. Ho ...

第一个是color abberation.
第二个是MTF 各种表示方式的转换。

图像质量的课程里都有讲，wiki 也都有。

wisher

What's the cause of LCA and ACA, what's the visual difference between them。 这个是不是说LCA和TCA？这个ACA是不是笔误了？

maver

axis color abberation

wisher

maver 发表于 2019-12-3 20:54
axis color abberation

LCA 是Longitudinal chromatic aberration 这个吗？

maver

wisher 发表于 2019-12-9 08:32
LCA 是Longitudinal chromatic aberration 这个吗？

LCA 是lateral Color abberation
https://en.wikipedia.org/wiki/Chromatic_aberration