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