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Results

In our experiment, we take three groups of LDR pictures and try to construct three HDR pictures from them. For each group of these pictures, we take 6 LDR pictures with different exposure times. We’ll display the response curve for each color channel: red, blue and green and our final HDR picture.

Group 1

Figure1.
Response Function for Channel Red

Figure2.
Response Function for Channel Green

Figure3.
Response Function for Channel Blue

Figure4.
LDR picture with exposure time 1/50s

Figure6.
LDR picture with exposure time 1/125s

Figure6.
LDR picture with exposure time 1/320s

Figure7.
LDR picture with exposure time 1/800s

Figure8.
LDR picture with exposure time 1/1600s

Figure9.
LDR picture with exposure time 1/4000s

Figure10.
Final HDR picture for Group 1

Comment: It’s impressive to see the details both of the light and of the clothes. For these kind of pictures, it’s always easy to lose the details of the light since the pixel values of the area around the light will get saturated. But, through HDR, we could keep the details of the light without losing any other details.

Group 2

Figure11.
Response function for Channel Blue

Figure12.
Response function for Channel Green

Figure13.
Response function for Channel Red

Figure14.
LDR Picture with exposure time 1/50s

Figure15.
LDR Picture with exposure time 1/100s

Figure16.
LDR Picture with exposure time 1/400s

Figure17.
LDR Picture with exposure time 1/1000s

Figure18.
LDR Picture with exposure time 1/2000s

Figure19.
LDR Picture with exposure time 1/4000s

Figure20.
Final HDR picture for Group 2

Comment: Once again, we almost see the details of the lamb. Although it’s distorted a bit, we know there’s something in it, instead of just completely white for the whole area. What’s amazing is that we could clearly see what’s going on in the background. All the details of the bags are clearly revealed.

Group 3

Figure21.
Response Function for Channel Blue

Figure22.
Response Function for Channel Green

Figure23.
Response Function for Channel Red

Figure24.
LDR Picture with exposure time 1/160s

Figure25.
LDR Picture with exposure time 1/320s

Figure26.
LDR Picture with exposure time 1/640s

Figure27.
LDR Picture with exposure time 1/1250s

Figure28.
Final HDR Picture for Group 3

Comment: Once again, we could see a lot of details both in over-exposed area and in under-exposed area. For example, we could see some words on the white container on the right hand side of the lamb. It’s impossible for us to see those words when we take a picture with relatively large exposure time. Similarly, we could see the details in the dark area. For example, we could see that there’s a purple/blue stuff lying on the black bag. However, it’s likely that we’ll barely see it when the exposure time of the picture is relatively small.

Questions & Answers

a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
im not good at math so would this help me
Rachael Reply
how did I we'll learn this
Noor Reply
f(x)= 2|x+5| find f(-6)
Prince Reply
f(n)= 2n + 1
Samantha Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, High dynamic range imaging. OpenStax CNX. Dec 18, 2012 Download for free at http://cnx.org/content/col11471/1.1
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