Stitching artifacts - PIX4Dfields

This article discusses the causes of artifacts in orthomosaics, when processing multispectral or RGB images.

Graphic card drivers issue

This is a common problem. The artifacts look really strange. Many colors are present, and it's a combination of big and small squares, images are scrambled, looking like a Picasso painting. 

While processing, the images stitch, and they look fine, but when the map is finally done, it is full of artifacts.

Example artifacts: 

   

This is commonly related to outdated graphic card drivers.To solve this: 

• Update graphic card drivers.

• After updating drivers and restarting the device, process the imagery again.

• If the problem persists, import the imagery again and disable GPU acceleration under Advanced settings - Processing options.

Color balance 

Different colors between images can generate "Honey comb" effect:

To solve this issue and improving the color transitions in the orthomosaic:

• Import the images again.
• Enable Full Blending under Processing options.

Insuficcient overlap

When overlap is insuficcient, processing may fail or artifacts can occur in the orthomosaic.

Ensure overlap is more than 70% for both side and frontal overlap. 

Corrupted images

Non-nadir or distorted images can generate artifacts. 

To solve this issue, inspect the images around the area and discard them when processing.