Report #1( imageProcessing )

 

Original Images

Saturn Taj

Tree Mona

 

GaussianSmoothing

Mona

Threshold = 35

Threshold = 175

3x3

7x7

 

Tree

Threshold = 55

Threshold = 200

3x3

7x7

Results:

As the thresholds increased for both images the edges became more blurred. However, using

A 3x3 operator from a low threshold to a higher threshold did not vary as much as did the 7x7

Operator. The images also seem to exhibit a darker hue after applying the gaussian smoothing

Operation.

 

 

MedianSmoothing

 

Saturn

Taj

3x3

5x5

Results:

The median filter worked with eliminating the noise without sacrificing too much of the image

Quality with a 3x3 operator. With a 5x5 operator the noise completely vanished but the

Sharpness of the original image faded noticeably.

 

 

Performance

 

3x3

5x5

7x7

9x9

Gaussian

.11sec

.17sec

.22sec

.28sec

Median

.77sec

1.54sec

2.42sec

3.51sec

Results:

These runs were done on a 166MHz, 586 ibm compatible computer. As the window of the

Operator grew the time increased in a linear fashion, as expected. I tried to increase the performance

Of the gaussian operation by implementing the incremental method of a 1D by 1D window operator.

However, the inherent nature of the weights associated with the gauss' methology prevented its use.