篆刻：帆

HDR - 6

alpha = 0.09

beta = 0.9

s = 0.1

HDR - 5

Some bugs are fixed. Here is new radiance map :

linear tone mapped in log domain :

Gradient attenuation map :

linear mapping after attenuation in log domain :

LDR with exp(I) :

Final result :

There are still some problems :

1. How to get better result from Poisson equation ?

2. How to select alpha & beta ?

3. Final result is not as good as the one presented in original paper.

HDR - 4

I think ...... I didn`t add any special effect ......

HDR - 3

what`s this ? Should I commit suicide ?

HDR - 2

I have tried to impl gradient domain tone mapping recently since the paper said it is "simple". But I still can`t get the correct result.

Above is the result of Poisson equation. After this, I don`t know how to mapping all channels. Below is one of my test which mixed 3 result (rgb) of poission equation.

Hope I can solve it in a few days /_\.

HDR

Recently, I have to check if the knowledge of HDR in my brain is correct. Here are some result :

1. One of Paul Debevec`s data set. Since my camera "can not" manually change shutter speed and I don`t want to implement MTB currently, I test the algorithm by this data set.

2. Rough tone mapped result :

3. Rough radiance map :

The response curve recovery algorithm is not difficult since you can find matlab version in the end of the paper.