/cs344_GPU_Parallel_Programming

udacity cs344 HW

Primary LanguageCuda

Intro to Parallel Programming

Lesson1 - Color to Greyscale Conversion

formula for color to greyscale conversion:

I = .299f * R + .587f * G + .114f * B

Lesson2 - gaussian_blur

Here is an example of computing a blur, using a weighted average, for a single pixel in a small image.

Array of weights:

0.0 0.2 0.0 0.2 0.2 0.2 0.0 0.2 0.0

Image (note that we align the array of weights to the center of the box):

1  2  5  2  0  3
   -------
3 |2  5  1| 6  0       0.0*2 + 0.2*5 + 0.0*1 +
  |       |
4 |3  6  2| 1  4   ->  0.2*3 + 0.2*6 + 0.2*2 +   ->  3.2
  |       |
0 |4  0  3| 4  2       0.0*4 + 0.2*0 + 0.0*3
   -------
9  6  5  0  3  9

     (1)                         (2)                 (3)

Lesson3 - HDR Tone-mapping

input : [2 4 3 3 1 7 4 5 7 0 9 4 3 2] min / max / range: 0 / 9 / 9

histo with 3 bins: [4 7 3]

cdf : [4 11 14]

Your task is to calculate this cumulative distribution by following these steps.