PPI Assist and AutoColumn

The PPI Assist feature will let you specify a target resolution, and the Camera Focus tool will then calculate how much the iXG camera needs to move relative to the subject to achieve the desired resolution.

This feature requires an iXG camera because it is capable of measuring the distance to the subject. In addition to entering a target resolution, you can also enter a desired magnification, image dimension (Field of View) or distance to the subject.

The PPI Assist feature requires an iXG camera with firmware version 3.06.5 or later installed.

Note that the PPI Assist and AutoColumn features are currently only supported on the Mac version of Capture One CH 12.1

Using PPI Assist with Camera Focus

1. Attach the iXG camera and activate live view by clicking on the Live View button in the Camera tool.

2. Select the desired Target unit from the drop-down menu, choosing either Resolution (PPI), Field of View (image dimension), Distance, or Magnification.

3. Enter the Target value in the field and click on the button next to it to apply the value. The lens on the iXG camera will now move to match the desired resolution in principle and the tool will report that the lens is “At the target”. Note that in order to calculate the actual resolution at the current position, the camera need to autofocus on the target first, which will happen in the following step.

  

4. Click on AF in the Camera Focus tool to let the iXG camera autofocus on the target. Note that during the autofocus sequence, the resolution and distances values will change.

 

5. Once focus have been achieved, the Camera Focus tool will indicate how far the camera has to move on the copy stand to reach the desired target resolution.

6. Use either the Copy Stand tool to move the camera (this feature is only supported on DT AutoColumn stands) or operate the camera position manually on the copy stand.

7. Once you have moved the camera, focus on the subject by clicking on the AF icon in the Camera Focus tool.


8. The Camera Focus tool will now report if the desired target resolution has been achieved with the message “At the Target”.

 

If you still need to adjust the camera’s position, repeat step 6 and 7.

AutoPPI with AutoColumn

If you have the iXG camera installed on a specialized copy stand – either a Phase One AutoColumn or a Cambo DT AutoColumn - the process will be fully automated as the stand will be able to move the camera the required distance.

The copy stand needs to be calibrated for the AutoPPI feature to work correctly. Click Calibrate in Copy Stand tool, and the camera arm on the column will start moving.

Select the desired Target unit from the drop-down menu, choosing either Resolution (PPI), Field of View (image dimension), Distance, or Magnification.

Enter the Target value in the field and click on the button next to it to apply the value. Click on Start

 

The AutoPPI feature will autofocus on the target, and once focus is achieved, the camera will move automatically on the copy stand to reach the desired resolution. Finally, the camera will autofocus on the target.

You can double check whether the Target Resolution is indeed achieved by comparing it to the info under Current Resolution. If that isn’t the case, click on the button next to the Target value, then click on Start.

Notes

If you select either Field of View or Distance, you can change the units by clicking on the options icon, selecting Distance unit and choosing either Inch, Millimeter or Centimeter.


 

If you need to reuse a certain target resolution, it can be saved for later use as a Preset. Click on the Preset icon and choose Save User Preset… Then save the value. When you select the Preset later, it will be entered into the Target field.


Make sure that the camera isn’t positioned too close to the subject. It is better to start with the camera near the top of the copy stand than vice versa.

It is recommended to position the orange autofocus frame in live view so it covers a high-contrast area as well as being as close to the middle of the subject as possible.