3 ms·

Were you (or anyone) able to open any of those .img files?

by state 8y ago

deleted 8y ago
[deleted]
LeoPanthera 8y ago
They're raw greyscale pixel values. I was able to convert one with imagemagick: convert -size 19992x16500 -depth 16 gray:FRAME_1005_H1.IMG out.png The dimensions are specified in the .LBL files in the same directory, right at the end of the file.
- JorgeGT 8y ago
  Alternatively, NASA help links to IMG2PNG for windows: http://bjj.mmedia.is/utils/img2png/ http://bjj.mmedia.is/utils/img2png/
acqq 8y ago
You probably don't want to use these for casual viewing, as they are too big. Use the PNG files from the other link, especially the lowest resolution only to get the idea what is there: To understand the .img files format refer to the corresponding .lbl file e.g. OBJECT = IMAGE LINES = 16500 LINE_SAMPLES = 19992 SAMPLE_TYPE = LSB_UNSIGNED_INTEGER SAMPLE_BITS = 16 END_OBJECT = IMAGE Only one image in format like that is more than 600 MB! Instead, the same in cca 100 KB: https://pds-imaging.jpl.nasa.gov/data/lo/LO_1001/EXTRAS/THUMBNAIL/LO1/FRAME_1005/FRAME_1005_H1.PNG https://pds-imaging.jpl.nasa.gov/data/lo/LO_1001/EXTRAS/THUM... To get some idea of how detailed it is, here's the crop of the 6 MB PNG version: https://ibb.co/jjoe7y https://ibb.co/jjoe7y Take a look at the top bar. The actual resolution (one small piece cropped from the full resolution) is: https://ibb.co/hthLfJ https://ibb.co/hthLfJ That's how astoundingly amazing the actual resolution is. You can see the grain of the film and the sharpness of the reference patterns. Note, that's the technology used in the spy satellites even more than 50 years ago, all without microprocessors which didn't exist! Comparing with that, the actual shot of the moon surface is, at least in this sample, much less detailed than what the film was able to capture, the scanner to scan, the transmission circuits to transmit and the tape to store: https://ibb.co/nLhsud https://ibb.co/nLhsud The black dot is maybe a piece of cosmic rays passing through the film. And if you are just interested in the general look of the moon surface, try first: https://www.google.com/moon/ https://www.google.com/moon/

Were you (or anyone) able to open any of those .img files?

by state 8y ago

Were you (or anyone) able to open any of those .img files?

deleted 8y ago

[deleted]

LeoPanthera 8y ago

They're raw greyscale pixel values. I was able to convert one with imagemagick: convert -size 19992x16500 -depth 16 gray:FRAME_1005_H1.IMG out.png The dimensions are specified in the .LBL files in the same directory, right at the end of the file.

JorgeGT 8y ago
Alternatively, NASA help links to IMG2PNG for windows: http://bjj.mmedia.is/utils/img2png/ http://bjj.mmedia.is/utils/img2png/

acqq 8y ago

You probably don't want to use these for casual viewing, as they are too big. Use the PNG files from the other link, especially the lowest resolution only to get the idea what is there: To understand the .img files format refer to the corresponding .lbl file e.g. OBJECT = IMAGE LINES = 16500 LINE_SAMPLES = 19992 SAMPLE_TYPE = LSB_UNSIGNED_INTEGER SAMPLE_BITS = 16 END_OBJECT = IMAGE Only one image in format like that is more than 600 MB! Instead, the same in cca 100 KB: https://pds-imaging.jpl.nasa.gov/data/lo/LO_1001/EXTRAS/THUMBNAIL/LO1/FRAME_1005/FRAME_1005_H1.PNG https://pds-imaging.jpl.nasa.gov/data/lo/LO_1001/EXTRAS/THUM... To get some idea of how detailed it is, here's the crop of the 6 MB PNG version: https://ibb.co/jjoe7y https://ibb.co/jjoe7y Take a look at the top bar. The actual resolution (one small piece cropped from the full resolution) is: https://ibb.co/hthLfJ https://ibb.co/hthLfJ That's how astoundingly amazing the actual resolution is. You can see the grain of the film and the sharpness of the reference patterns. Note, that's the technology used in the spy satellites even more than 50 years ago, all without microprocessors which didn't exist! Comparing with that, the actual shot of the moon surface is, at least in this sample, much less detailed than what the film was able to capture, the scanner to scan, the transmission circuits to transmit and the tape to store: https://ibb.co/nLhsud https://ibb.co/nLhsud The black dot is maybe a piece of cosmic rays passing through the film. And if you are just interested in the general look of the moon surface, try first: https://www.google.com/moon/ https://www.google.com/moon/