Technical Guide (HLG Photo Edition)

Export Options

The following settings can be adjust

ed:

[Original Image]

Export the pictures in the current selection or in selected folders.

[Selected images]: Export the pictures in the current selection.

[Selected folder]: Export all pictures in a selected folder. To choose the folder, click [Browse].

[Include subfolders]: Include pictures in all sub-folders under the selected folder.

[Delete originals after operation]: Delete the original pictures from the folder once export is

complete.

[Export as]

Choose a format for the exported files from [JPEG], [TIFF (8 Bit)], [TIFF (16 Bit)], [HEIF (HLG)], and

[HEIF (PQ)].

Files with thumbnails marked “PQ” cannot be saved in other formats.

[HEIF (HLG)] and [HEIF (PQ)] will be available only if the thumbnail for the source file is marked

“HLG”.

The estimated total size is not displayed when an HEIF option is selected.

[Quality]: Choose the compression ratio for pictures exported in JPEG or HEIF format. The JPEG

compression ratio can be selected by dragging the slider or entering the desired value. In the

case of HEIF, Windows offers a choice of [Highest Compression Ratio], [Good Compression

Ratio], [Good Balance], [Good Quality], and [Excellent Quality]. macOS does not offer a choice

of HEIF compression settings.

[Use LZW Compression]: This option is available when pictures are saved in TIFF format. Select it

to compress the files using a lossless LZW compression algorithm.

D LZW Compression

Enabling LZW compression when converting pictures to 16-bit TIFF may increase file size.

D “HEIF (HLG)” and “HEIF (PQ)”

Pictures exported with [HEIF (HLG)] or [HEIF (PQ)] selected for [Export as] will be saved

respectively in HLG or PQ (Perceptual Quantization) HEIF format.

While HLG and PQ formats both conform to the HDR standard, they differ in the following

respects.

HLG represents luminosity as a relative value, meaning that luminosity varies with the device

on which the picture is displayed.

PQ represents luminosity as an absolute value, meaning that luminosity does not vary with the

device on which the picture is displayed.

Pictures converted to PQ HEIF using the [HEIF (PQ)] option have thumbnails marked “PQ” and

can no longer be edited in NXStudio.

Saving Pictures in Other Formats Using NXStudio