Crop Module Use

Notes from users, documentation addendums.

Crop Module Use

Postby Guy » Tue Feb 14, 2017 10:05 am

Here are some notes relating to using this module. It is not the only way to use the module and experimentation is encouraged.
Please let me know if anyone sees any errors or has any additional advice they think helpful.
I will update this post as needed.
To see a full alphabetical list of module topics click here

Crop Module Use

Purpose:
  • To crop the sides of the image.
Description:
The Crop module allows you to remove stacking artefacts and reframe your image.

Useful Sources
The Unofficial guide is also a good source of help. It relates to version 1.3.5 so there may have been some changes. The notes below relate to StarTools version 1.4.
The processing tutorial video M8 in Color with modest data describes the use of the Crop module between 1m23s and 1m40s.

When to use:
  • Before the Wipe module. Normally just before or after the Bin module (if used).
  • After the Lens module, if used. The Lens module relies on the image being centred relative to the camera sensor - and can also warp the image when correcting distortion - so it is important this is done before using the Crop module.
Example Workflow:
AutoDev-{Band/Lens}-Bin-Crop-Wipe-AutoDev(or Develop)-{As needed: Decon/Sharp/Contrast/HDR/Flux/Life}-Color-{Filter}-Denoise-{If needed: Layer/Magic/Heal/Repair/Synth}
Key: {...} optional modules

Method:
  1. Either: Click on the StArt preset to crop just the stacking artefacts.
  2. Or: Adjust the X1, Y1, X2 and Y2 sliders to move the crop the sides as needed.
  3. Or: Click and drag on the image to define the area to keep.
  4. If combining LRGB and processing them separately - all the cropping should be done exactly the same (to give the same image pixel dimensions)
  5. 'Keep' when done.
What result to look for:
  • Check the stacking artefacts have been removed.
  • Check the image framing is how you want it.
After Use:
  • Use the (optional) Bin module if not already used - and then the Wipe module.
Description of Controls:

StArt preset
Automatically crops the image to remove any stacking artefacts.

X1
Sets the Left hand edge crop position - position shown is measured from the left.
  • Default is 0 pixels. Range is 0 pixels to max width.
X2
Sets the Right hand edge crop position - position shown is measured from the left (right).
  • Default is max width in pixels. Range is 0 pixels to max width.
Y1
Sets the Top edge crop position - position shown is measured from the top (right).
  • Default is 0 pixels. Range is 0 pixels to max height.
Y2
Sets the Bottom edge crop position - position shown is measured from the top (right).
  • Default is max hight in pixels. Range is 0 pixels to max height.
Guy
 
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