doc:appunti:hardware:olympus-e-m10:raw_processing
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doc:appunti:hardware:olympus-e-m10:raw_processing [2023/01/11 16:41] – [OM Workspace] niccolo | doc:appunti:hardware:olympus-e-m10:raw_processing [2023/01/27 10:54] – [How To] niccolo | ||
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===== RawTherapee ===== | ===== RawTherapee ===== | ||
- | FIXME | + | 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 // |
+ | |||
+ | 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 '' | ||
+ | |||
+ | ==== How To ==== | ||
+ | |||
+ | * **Export cooked image file**: | ||
+ | - Into the Editor apply the required cooking processes using the **Toolbox tabs** on the right side (// | ||
+ | - A checkmark icon appears over the thumbnail, this means that the image is processed (a sidecar '' | ||
+ | * **Restore RAW image to default state** | ||
+ | * In the File Browser right-click the image and select // | ||
+ | * Otherwise, when the program is closed, you can delete the sidecar '' | ||
+ | * **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 // | ||
+ | |||
+ | ==== 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: | ||
+ | |||
+ | {{.: | ||
+ | {{.: | ||
===== dcraw ===== | ===== dcraw ===== | ||
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{{.: | {{.: | ||
{{.: | {{.: | ||
- | {{.: | + | {{.: |
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> | 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> | ||
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</ | </ | ||
- | 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 |
{{.: | {{.: |
doc/appunti/hardware/olympus-e-m10/raw_processing.txt · Last modified: 2023/01/27 11:00 by niccolo