Image Enhancement Of Alien Topography

IMAGE ENHANCEMENT OF ALIEN TOPOGRAPHY

INTRODUCTION: DIGITAL IMAGE PROCESSING Digital image processing is an indispensable procedure to explore the hidden information from the visual data. EARLIEST APPLICATIONS: In 1920, undersea cables between London and new York In 1964, Jet propulsion lab, for restoring images taken from moon.

DIGITAL IMAGE REPRESENTATION

Any image refers to two-dimensional light intensity function f (x, y) where x and y are special co-ordinates with their origin at left top end of the image. Picture elements or PIXELS. DIGITIZERS: It converts an image into numerical information suitable for input into a digital computer. This is a very important device in image processing Ex: Image scanners, video grabbers

ENHANCEMENT OF IMAGES OF MARTIAN SURFACE: FACE ON MARS Step 1: ENHANCEMENT OF AN IMAGE In the case of images obtained at cydonia in mars. The enhanced version had much information than the raw one. they use the processed enhancements called as “catbox” or “TJP” already present at JPL (Jet propulsion lab,U.S). RAW DATA

The enhanced image using “catbox” is shown below

DOWNSIZING: This process reduces the data present in the image. The reason for this is to reduce some of the noise present in the image but this can also remove the subtle details from an image. ALGORITHM FOR DOWNSIZING: (1) The image is sized down by interpolation by a factor of two (2) Application high pass filter (3) Application low pass filter (4) Stretching (5) Averaging (6)Flipping

STEP 2 INTERPOLATION: This process is also called as “resampling” or “antialiasing”.

The area of a single pixel in the MGS Face image is about 18.67 square feet

ALGORITHM: Large pixel to number of smaller pixels 3) The value of the new pixel is derived from the shared values of the original pixel 4) Repeat until the image is completed. Usually bicubic interpolation is used wherein the value of every pixel is shared by surrounding twelve pixels.

ENHANCEMENT OF FINE STRUCTURES IN THE FACE

STEP1: The first processing step is to "clean up" the imagery.

STEP2: Clip & Stretch

STEP3: Enhancement of Lateral Stripes

Enhancement of Thin Lines

Fine Structure in Mouth Area 1st day (fig 1) | 40th day (fig 2)

Figure obtained by adding above two figures

Variations of face on MARS

CONLUSION: Thus the above techniques mentioned in this paper are extensively used to enhance not only space images but also to explore other hidden details from images which are of great importance to enrich man’s knowledge about our UNIVERSE.

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