BoinJou

Back to Psych 221 Projects 2013

Introduction

Below is another example of a reinotopic map in a different subject.
Figure 2

Once you upload the images, they look like this. Note that you can control many features of the images, like whether to show a thumbnail, and the display resolution.

Figure 3

Background

CFA Interpolation

A color filter array is an array of color filters placed on top of a camera sensor to capture color information which can then be interpolated to produce color information for neighboring pixels. Different cameras can have different patterns for this CFA color sampling. The most common pattern used is the Bayer pattern.

In Camera Forensics, often, the periodicity of the Color Filter Array is exploited to detect possible tampering in images. But, often when given an image, we don’t know the sampling lattice, and also we don’t know how the interpolation was done. We can use the expectation-maximization algorithm to estimate both of these.

Results

Localization: Clustering

Some text. Some analysis. Some figures.

Classification

Some text. Some analysis. Some figures.

References

References

Software

Appendix I - Code and Data

Code

File:CodeFile.zip

Data

zip file with my data