Ricoh J6I and Casio CAM to JFIF (JPEG) Converter
I have written two DOS programs to convert these proprietry image formats into the more widely understood JFIF (JPEG File Interchage Format). They can be run under windows but because they have no graphical user interface the effect can be a bit odd. You need to know what you are doing! It is much better to run the programs from a DOS command prompt, rather just clicking the .EXE file.
I have a cobbled together (but just about working) Linux version of these programs which I have used once to convert my old images into .jpg files. I have not posted the Linux sources here because the port is so very crude, but if you'd find it useful, let me know and I will try to make it available.
Just before I stopped windows work, I had almost finished a graphical image viewer called PINFO which can understand many modern EXIF camera files as well as the old Ricoh and Cam formats. You might want to try that.
Ricoh J6I to JFIF converter:
Zipped DOS executable: ricoh.zip.
Zipped DOS program sources: ricoh-dos-src.zip.
Casio CAM to JFIF converter:
Zipped DOS executable: casio.zip.
Zipped DOS program sources: casio-dos-src.zip.
- Image scaling to any size and aspect ratio with anti-aliasing.
- Output compression parameters derived from the recorded image so that fine, normal and economy pictures are converted with minimal loss of quality and without wasting storage space.
- An arbitrary comment can be added to the output file. By default this will be the date and time from the j6i file that would otherwise be lost.
- The "ragged edges" that result from the Ricoh camera's inability to record the colour of the first and last few pixels on an image line can be automatically cropped.
- A "no resize" mode that does not touch the image data in any way. It simply replaces the Ricoh file header with a valid JFIF header and thus avoids decompressing and recompressing the image data.
All the hard bits are done by the Independent JPEG Group's JPEG software library. Without this excellent free code, the converter would not have been written. The original page that gave me the clues about reading these formats is no longer on line. It useed to be at http://www.kani.com/dcdataform/index.html.
These programs may be used freely used by individuals and not-for-profit organisations, but is provided as is with no waranty or guarantee of fitness for any purpose..
If you find either program useful, please let me know.