Tip #34Kinesense LE

How to crop and perspective-crop an image or video

Export just part of a frame with Crop, or straighten an angled area such as a licence plate with Perspective Crop, in the Clarification tab.

Patricia McCabeSoftware Engineer

Clarifications, part of the Report tab, are tools that can help you clear up an image or video. Today we’re going to cover the two different types of cropping found in the geometry tools.

The Clarification tab in the Report tab.

Cropping Crop button

If you want to just export a section of an image or video you can do this by cropping the image. Click the crop button and a message, Click and Drag to Crop, will appear over your image on the right hand side. Another preview will appear on the left hand side. This will show you what the resulting image will look like.

The crop tool with “Click and Drag to Crop” over the source image and a preview of the result.

On the right hand side click on the image and drag the box over the area you which to crop to. The left hand side will be updated with the new cropped image.

A crop box drawn around two cars and a person, with the cropped result shown enlarged.

Perspective Crop Perspective crop button

If the part of the image you’re interested in it at an angle, sometimes applying a perspective drop can help you view it better. The main difference between this and cropping is that this time, instead resizing a box you’ll be applying points to create the crop.

Once again when you click perspective crop two images will appear, one where you apply the crop and the other where you see the results. Using your mouse, in a similar manner to creating a filter, apply four points around the part of the image you want to crop. The result will then appear on the left.

Perspective crop applied to an angled licence plate on a car, with the straightened plate shown beside it.

Applying the scale tool to this image allows you to get an even better look at the above licence plate but we’ll cover that next week.

The perspective-cropped licence plate scaled up so it reads BU16 PLV.

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