Die Schembergs!

SNS-HDR lite - short Tutorial

What is a HDR/DRI?

Good question! You will find that definition at Wikipedia:

"In image processing, computer graphics, and photography, high dynamic range imaging (HDRI or just HDR) is a set of techniques that allows a greater dynamic range between the lightest and darkest areas of an image than current standard digital imaging techniques or photographic methods. This wide dynamic range allows HDR images to represent more accurately the range of intensity levels found in real scenes, ranging from direct sunlight to faint starlight, and is often captured by way of a plurality of differently exposed pictures of the same subject matter.[1][2][3]

In simpler terms, HDR is a range of techniques geared toward representing more contrast in pictures. Non-HDR cameras take pictures at a single exposure level with a limited contrast range. This results in the loss of detail in bright or dark areas of a picture, depending on whether the camera had a low or high exposure setting. HDR compensates for this loss of detail by taking multiple pictures at different exposure levels and intelligently stitching them together so that we eventually arrive at a picture that is representative in both dark and bright areas."

How to produce the need series of pictures?

To get that you need at minimum two (better about 10) pictures of the same scene. You will receive the best results, when you use a tripod and a remote control for that.

SNS-HDR lite

Where can I get SNS-HDR lite?

Download here. Best: It is for free!

I don't why, but that site is Polish only. You can choose Google translations to get a rough idea of the content. The program itself is English!

What is that?

SNS-HDR lite is a program, which you can use to generate HDR files from you LDR pictures. There are severeal other programs, which can do the same, but SNS-HDR produces quite nice results in my opinion.

The lite version lacks a grafical user interface (GUI) - you have to move to the pro version, which costs 30 € to get a GUI. I don't think for the first steps that the GUI is needed.

How to use?

After installation there is a icon on your desktop:

You just drop the series of files (the source files for HDR) on this icon and SNS-HDR starts processing:

 

After this is finished - the command line windows is gone - you will find a new picture in the source files folder. That's all.

Options

You can use optional parameters to control SNS-HDR

Options:
-da Disable alignment
-dd Disable deghosting
-pm Panorama mode
-srgb Convert color profile to sRGB IEC61966-2.1
-ee "path" Opening HDR image in external editor

Size reduction:
-x1 -x2 -x3 -x4

Presets:
-default
-dramatic
-interior
-ldr
-natural
-neutral
-night
-soft

Output formats:
-jpeg JPEG (default)
-tiff8 TIFF 8-bit format
-tiff16 TIFF 16-bit format

I recommend, that you use the -tiff16 option, that produces a 16 Bit TIFF file, which can be processed in Photoshop or Gimp. To get that working, you look at the properties of the desktop icon and extend the command line after the double quote with " -tiff16". You can add additional options.

Use the GUI

The author provide a small GUI for the lite version:

Download here

That is quite cool, so the program is complete. Before you can really use it, you have to click on the "SNS-HDR Lite" button in the low left corner. Choose where the sns-hdr.exe is located and you are finished.

Examples

OK, you want to see examples? More examples than on the website of SNS-HDR? Have a look at the SNS-HDR group at flickr.com:

http://www.flickr.com/groups/1358940@N24/

News

Mein neuer MFP von Lexmark hat mich jetzt zwei Stunden mit der Funktion "Scan to mail" und "Scan to FTP" beschäftigt. Da ich die richtige Lösung nirgendwo gefunden habe, hier einige Hinweise.

Bei einem Senioren Linux ist es wichtig auch eine Fernwartung/Remote Support zu haben.

Die Welt von 64 Bit erschließt sich Windows ja erst langsam. Erst seit Windows 7 kaufen wirklich viele die 64 Bit Version. Leider gibt es nicht für jede Hardware einen Treiber.