![]() ![]() For older scanner models with 14 bit precision or even only 12 bit precision equalizing the three color channels' lightness before analog/digital conversion can improve the quality of the inversion. For modern scanners with 16 bit/channel precision this often is irrelevant for inverting the negative as there is still enough detail to work with. In a typical linear scan of a color negative the blue channel is more than two exposure values below the red channel and the green channel often is more than one EV below it. An example of scanners allowing you to do this is the Nikon Coolscan series. If you are using an older scanner model which supports the adjustment of lamp brightness or respectively exposure time for the individual color channels which is often referred to as analog gain you can utilize that to reduce the orange mask of a color negative during scanning or even to eliminate it altogether. Improving quality by use of analog gainįor some scanners further options on the special tab can be of interest. That is if this is supported by the particular scanner hardware you possess. When scanning color negatives it is also advisable to consider the use of multi sampling. If you want to use this on your negative or slide scans you can do so. One such option is the automated removal of dust and scratches via Digital ICE. Some options that can exclusively be executed during scanning itself will remain active when operating in HDR mode. To avoid this you'll need to make sure that the checkbox "for HDR output" next to the "Gamma-Gradation" field on the options' General tab is left unchecked. There is a setting among SilverFast's options however that will let HDR scans get gamma encoded just like ordinary scans. The files recorded in HDR mode normally contain unchanged sensor data and thus are of linear Gamma. The Gamma setting in SilverFast usually does not influence HDR scans at all. The resulting Tiff files - which are sometimes referred to as SilferFast HDR files - contain linear intensity values as are being read in by the scanner and as is required for negative conversions with ColorPerfect's ColorNeg mode or the previous ColorNeg plug-in. All image editing choices will be disabled after doing so. Here you need to define "48 Bit HDR Color" to be the "Scan Type". There you need to set the "Scan Mode" to "Normal (File)" and to select "Positive" from the drop down list next to "Pos./Neg.".Īs a second step navigate to the Frame tab. To create a 16 bit linear scan start by selecting the General tab. Another scanner software that enables you to create linear slide and negative scans is Lasersoft Imaging's SilverFast SE or Ai.
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