The Problem with Pakon PSI Software raw output

This is a demonstration of occasional image-quality issue when exporting 8-bit "raw" files from the PSI software when scanning film with the Pakon 135+.

Despite the Pakon 135+ being able to scan at 16 bits of image data, the PSI software is only able to export files at 8-bits, even when exporting raw files. This sometimes causes visual quantization issues in highlight areas when raw files are processed. TLXClientDemo's planar raw output is the full 16-bits and does not suffer from this issue. TLXClientDemo's planar raw files can be easily batch converted with the PPRC tool.

Note: The images below are 100% crops presented as 8-bit JPEG files, please see links below images to full samples.

PSI Raw TIFF Output

100% crop of scan produced by exporting an 8-bit Raw TIFF file from PSI and inverting with Negfix8. Quantization issues can be seen in the sky due to the limited bit-depth of the raw file.

Link to full resolution processed TIFF file (10mb archive).

Link to Raw TIFF file (13mb archive).

TLXClient Planar Raw Output

100% crop of scan produced by exporting a 16-bit Planar Raw file from TLXClientDemo and converted with PPRC.

Link to full resolution processed TIFF file (26mb archive).

Link to Raw TIFF file (30mb archive).

PSI Raw TIFF Output

100% crop of scan produced by exporting an 8-bit Raw TIFF file from PSI and inverting with Negfix8. Quantization issues can be seen in the sky due to the limited bit-depth of the raw file.

Link to full resolution processed TIFF file (10mb archive).

Link to Raw TIFF file (13mb archive).

TLXClient Planar Raw Output

100% crop of scan produced by exporting a 16-bit Planar Raw file from TLXClientDemo and converted with PPRC.

Link to full resolution processed TIFF file (26mb archive).

Link to Raw TIFF file (30mb archive).