Stitching artifacts - PIX4Dreact

This article discusses the causes of artifacts in orthomosaics.

Graphics card driver 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. 

Example artifacts: 

   

This is commonly related to outdated graphics card drivers.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

• The drivers of the graphics card should be updated. This article can be handy: Update graphics card driver. 

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

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

Color balance 

Different colors between images can generate a "honeycomb" effect:

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

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

Insufficient overlap

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

Make sure the overlap is more than 70% for both the 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. 

Buildings are not straight - 2d reconstruction does not look perfect

PIX4Dreact is designed for speed and immediate situational awareness, particularly in emergency or disaster scenarios. As such, it is not optimized for generating high-precision orthomosaics or accurately reconstructing buildings. Some level of blurriness or distortion—especially around vertical structures—is expected.

For users requiring high-quality outputs or detailed 3D reconstruction, we recommend using PIX4Dmatic software tailored to those needs.