Differences

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--- doc:appunti:hardware:olympus-e-m10:raw_processing [2023/01/11 18:45] – [RawTherapee] niccolo
+++ doc:appunti:hardware:olympus-e-m10:raw_processing [2023/01/27 11:00] (current) – [RawTherapee] niccolo
@@ Line 52: / Line 52: @@
 {{ olympus-raw-control.jpg?160|}}
 RAW development performed by OM Workspace is called **PC RAW processing** because it is performed by the PC. With some Olympus cameras it is possibile to perform the so called **USB RAW processing**, i.e. the processing is performed by the camera graphic processor (generally the Olympus TruePic) via the USB cable. The camera must be turned on and switched to the **RAW/Control** mode (see the picture of the USB menu on the right). Unfortunately the E-M10 is not capable of such mode.
-===== Darktable =====
-FIXME
 ===== RawTherapee =====
-The program uses a clever procedure to open a RAW image for editing: it searches for the embedded thumbnail into the RAW file and it builds a tone curve on-the-fly to match the RAW data to the jpeg. This generally will assure that the program can open a RAW picture with no specific knowledge of the camera model. Thid default behaviur is controlled by the //Preferences// => //Image Processing// => //Default Processing Profile// => //For raw photos//: **Auto-Matched Curve ISO Low**.
+The program uses a clever procedure to open a RAW image for editing: it searches for the embedded thumbnail into the RAW file and **it builds a tone curve on-the-fly** to match the RAW data to the jpeg. This generally will assure that the program can open a RAW picture with no specific knowledge of the camera model. Thid default behaviur is controlled by the //Preferences// => //Image Processing// => //Default Processing Profile// => //For raw photos//: **Auto-Matched Curve ISO Low**.
 For the Olympus E-M10 the thumbnail embedded into a RAW file is a JPEG file with a resolution of **3200 x 2400** pixels and about **1 Mb** in size (you can extract if using the ''dcraw'' program).
-FIXME
+==== How To ====
   * **Export cooked image file**:
     - Into the Editor apply the required cooking processes using the **Toolbox tabs** on the right side (//Exposure//, //Detail//, etc.)
     - A checkmark icon appears over the thumbnail, this means that the image is processed (a sidecar ''.pp3'' file is saved along the RAW image); click the //Save current image// icon below the edit screen.
-    -
+  * **Restore RAW image to default state**
+    * In the File Browser right-click the image and select //Processing file operations// => //Clear//.
+    * Otherwise, when the program is closed, you can delete the sidecar ''.pp3'' file where RawTherapee saves the development procedure.
   * **Delete image files**:
     - From the File Browser click the //Move to trash// icon above the image thumbnail.
     - Click the //Show contents of trash// icon on the filter toolbar.
     - Click the //Permanently delete all files in trash// on the left of the thumbnails view.
+==== The default cooking ====
+I made a simple test opening a RAW file and **changing the white balance** from the in-camera preset to //shade//, no other changes were applied to the image. The image is then saved with JPEG quality 98 and //best quality// subsampling. Here it is a 8x zoom detail, compared with the in-camera JPEG. As you can see the **noise reduction** applied in-camera is significantly higher than the one used by RawTherapee:
+{{.:rawtherapee:develop-default-rawtherapee.jpg?240|RawTherapee default RAW processing}}
+{{.:rawtherapee:develop-default-in-camera.jpg?240|In-camera JPEG}}
+===== Darktable =====
+FIXME
 ===== dcraw =====
@@ Line 223: / Line 232: @@
 {{.:dcraw:dcraw-magick-in-camera.jpg?180|In-camera JPEG}}
 {{.:dcraw:dcraw-magick-raw.jpg?180|dcraw only}}
-{{.:dcraw:dcraw-magick-bright-contrast.jpg?180|dcraw and ImageMagick tonal adjust}}
+{{.:dcraw:dcraw-magick-bright-contrast.jpg?180|dcraw and ImageMagick manual tonal adjust}}
 If you want to roughly compare the in-camera developed JPEG and the image produced by ImageMagick (concerning brightness and contrast), you can get the overall image statistics using the **identify** command provided by ImageMagick itself. Check for the **[[wp>Mean|mean]]** and **[[wp>Standard deviation|standard deviation]]** values (where the value in parenthesis are normalized into the interval 0-1); a low mean value means a low brightness, a low standard deviation value means a low contrast:
@@ Line 251: / Line 260: @@
 </code>
-The following three enlargements show the sharpening of the **in-camera JPEG**, the RAW developed with **tonal adjust and no sharpening** and the RAW developed with **tonal adjust and sharpening**:
+The following three enlargements show the sharpening of the **in-camera JPEG**, the RAW developed (dcraw + ImageMagick) with **tonal adjust and no sharpening** and the RAW developed with **tonal adjust and sharpening**:
 {{.:dcraw:sharpen-in-camera.jpg?200|In-camera JPEG sharpening}}