On Mon, 2025-06-09 at 14:41 +0200, Frank wrote: > Is this what you expect for a JPEG2000 file? > file jpeg2000-home.jpg > jpeg2000-home.jpg: JPEG image data, JFIF standard 1.01, resolution > (DPI), density 72x72, segment length 16, progressive, precision 8, > 800x400, components 3
Hi Frank, no, your file is a "classic" JPEG. JPEG 2000 ========= $ wget -q https://hirise-pds.lpl.arizona.edu/download/PDS/RDR/PSP/ORB_003400_003499/PSP_003434_1755/PSP_003434_1755_COLOR.JP2 $ file PSP_003434_1755_COLOR.JP2 PSP_003434_1755_COLOR.JP2: JPEG 2000 Part 1 (JP2) $ exiftool PSP_003434_1755_COLOR.JP2 ExifTool Version Number : 13.30 File Name : PSP_003434_1755_COLOR.JP2 Directory : . File Size : 592 MB File Modification Date/Time : 2016:08:27 00:12:51+02:00 File Access Date/Time : 2025:06:08 13:30:09+02:00 File Inode Change Date/Time : 2025:06:08 13:29:23+02:00 File Permissions : -rw-r--r-- File Type : JP2 File Type Extension : jp2 MIME Type : image/jp2 Major Brand : JPEG 2000 Image (.JP2) Minor Version : 0.0.0 Compatible Brands : jp2 Image Height : 83639 Image Width : 14423 Number Of Components : 3 Bits Per Component : 10 Bits, Unsigned Compression : JPEG 2000 Color Spec Method : Enumerated Color Spec Precedence : 0 Color Spec Approximation : Not Specified Color Space : sRGB URL : Exif Byte Order : Little-endian (Intel, II) Bits Per Sample : 8 Photometric Interpretation : BlackIsZero Strip Offsets : 181 Samples Per Pixel : 1 Rows Per Strip : 1 Strip Byte Counts : 1 Planar Configuration : Chunky Pixel Scale : 0.25 0.25 0 Model Tie Point : 0 0 0 6896111.375 -265319.125 0 Geo Tiff Version : 1.1.0 GT Model Type : Projected GT Raster Type : Pixel Is Area GT Citation : Equirectangular MARS Geographic Type : User Defined Geog Citation : GCS_MARS Geog Geodetic Datum : User Defined Geog Angular Units : Angular Degree Geog Ellipsoid : User Defined Geog Semi Major Axis : 3396190 Geog Semi Minor Axis : 3396190 Projected CS Type : User Defined Projection : User Defined Proj Coord Trans : Equirectangular Proj Linear Units : Linear Meter Proj False Easting : 0 Proj False Northing : 0 Proj Center Long : 180 Proj Center Lat : 0 Image Size : 14423x83639 Megapixels : 1206.3 FITS ==== https://fits.gsfc.nasa.gov/fits_samples.html https://fits.gsfc.nasa.gov/nrao_data/tests/incunabula/orion-16.fits https://fits.gsfc.nasa.gov/nrao_data/tests/incunabula/m87-32.fits Regards. Ralf
