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NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
CALIFORNIA INSTITUTE OF TECHNOLOGY
JET PROPULSION LABORATORY
PASADENA, CALIFORNIA 91109 

MEDIA RELATIONS OFFICE
TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov

RAW IMAGE POSTED - April 6, 1998 10:30 AM Pacific Daylight Savings Time
JPL MIPL CONTRAST ENHANCED IMAGE POSTED - April 6, 1998 1:45 PM Pacific Daylight Savings Time
JPL TJP CONTRAST ENHANCED IMAGE POSTED - April 6, 1998 5:30 PM Pacific Daylight Savings Time
CAPTION CORRECTION POSTED - April 7, 1998 10:30 AM Pacific Daylight Savings Time
IMAGE ORIENTATION CLARIFICATION POSTED - April 7, 1998 4:00 PM Pacific Daylight Savings Time

Enhancement of "Face on Mars" Segment by MIPL ( cydonia1c-s.gif 0.254 MB )

Enhancement of "Face on Mars" Segment by TJP ( cydonia1tp_face.gif 0.9 MB )

Map Showing Location of MGS Data to Viking Frame 035A72 ( 0.5 MB )

Complete Record of Targeted Observations

MGS Home Page

CYDONIA REGION

RAW IMAGE
cydonia1_icon.gif 
MEDIUM RESOLUTION IMAGE 
( cydonia1m.gif 1.2 MB )

FULL RESOLUTION TIFF IMAGE 
( cydonia1.tif 9.6 MB )

 

 

MIPL CONTRAST ENHANCED IMAGE
cydonia1c_icon.gif
MEDIUM RESOLUTION IMAGE 
( cydonia1c.gif 2.5 MB )

MEDIUM RESOLUTION TIFF IMAGE 
( cydonia1c.tif 2.5 MB )

Segment of Enhanced Image
( cydonia1c-s.gif 0.254 MB )

( cydonia1c-s.tif 0.255 MB )
TJP CONTRAST ENHANCED IMAGE
TOP PORTION
cydonia1tp_top_icon.gif
MEDIUM RESOLUTION IMAGE 
( cydonia1tp_top_med.gif 1.8 MB )

FULL RESOLUTION GIF IMAGE 
( cydonia1tp_top.gif 7.1 MB )

FULL RESOLUTION TIFF IMAGE 
( cydonia1tp_top.tif 7.9 MB )

BOTTOM PORTION
cydonia1tp_bot_icon.gif
MEDIUM RESOLUTION IMAGE 
( cydonia1tp_bot_med.gif 2.0 MB )

FULL RESOLUTION GIF IMAGE 
( cydonia1tp_bot.gif 7.6 MB )

FULL RESOLUTION TIFF IMAGE 
( cydonia1tp_bot.tif 7.9 MB )
CYDONIA PHOTO CAPTION Orbit: 220 Range: 444.21 km Resolution: 4.32 m/pixel Actual image dimensions: 1024 X 9600 pixels, 4.42 km X 41.5 km Line time: 0.69 msecEmission angle: 44.66 degrees Incidence angle: 64.96 degrees Phase angle: 61.97 degrees Scan rate: ~0.1 degree/sec Start time: periapsis + 375 sec Sequence submitted to JPL: Sat 04/04/98 15:15 PST Image acquired by MOC: Sun 04/05/98 00:39:37 PST Data retrieved from JPL: Mon 04/06/98 09:05 AM PDT Data processed by JPL MIPL: Mon 04/06/98 12:30 PM PDT MIPL - Mission Image Processing Laboratory, JPL Data processed by JPL TJP: Mon 04/06/98 2:30 PM PDT TJP - Tim J. Parker, JPL JPL Comparison with Viking Frame 035A72: Mon 04/06/98 5:30 PM PDT JPL Correction: Tue 04/07/98 10:00 AM PDT CYDONIA PHOTO CAPTION as stated on: Mon 04/06/98 10:30 AM PDT Image dimensions: 1024 X 19200 pixels, 4.42 km X 82.94 km This was a typographical error for which we appologize. Actual image dimensions: 1024 X 9600 pixels, 4.42 km X 41.5 km JPL Clarification: Tue 04/07/98 4:00 PM PDT Please note that the original RAW IMAGE file is in the orientation as it was received from the spacecraft. All enhanced versions are flipped from left to right to yield the correct orientation. This was done so that the images are in the same orientation as the Viking data.
Processing Performed by Tim J. Parker, Geologist Mars Pathfinder Science Support, JPL. Image Processing Steps: (1) Vertical banding in raw image removed using Vicar software with long, narrow, highpass box filter, oriented parallel to banding in image. (2) Performed moderate histogram stretch in Adobe Photoshop on Macintosh desktop computer. (3) "Flattened" broad shading variations in scene by copying image and creating a "mask" in Photoshop with the shading inverted with respect to the original image. This mask was then merged with original scene and a second histogram stretch performed. (4) Physically stretched image in Photoshop in direction perpendicular to the narrow dimension of foreshortened craters by 151.25% in order to approximate an orthographic view of the scene.
Processing Performed by MIPL, JPL Image Processing Steps: (1) The image is sized down by interpolation by a factor of two to reduce some of the noise. (2) A long, narrow high-pass filter is applied in a vertical orientation to help reduce some of the instrument signature. This signature is seen as the streaking that is noticeable in the original data. (3) A long, narrow low-pass filter is applied in a horizontal orientation to create an intensity average for the image. (4) The results of these filtering operations are the stretched to approximate a Gaussian distribution. (5) The results of the high-pass and low-pass processing steps are averaged together to form the final product. (6) The image is flipped about the vertical axis to correct for the camera orientation.