The number of pixels, commonly referred to as resolution, determines the level of detail that can be captured in an image. But, if a surveying task doesn't necessitate high-resolution imagery, a smaller sensor with fewer pixels can do the job. In many respects, it depends which outputs are required: A larger sensor with more pixels and finer details can provide better data for analysis, which is crucial when precise measurements or detailed feature extraction are required. In comparison, smaller sensors with smaller image sizes can streamline the image processing workflow and improve efficiency at the data processing stage. Many of these will be discussed later in this blog.Īs larger sensors generally produce higher-quality images with more detail, it is important to remember that processing these images requires more computational resources and time. It is important to state that these levels of efficiency aren't purely down to sensor size, but a combination of factors, such as shooting interval speed, camera resolution, pixel size, and battery life of the drone. For more details, read our guide to GSD and drone surveys. The chart references GSD (Ground Sampling Distance), which is a crucial consideration during drone photogrammetry surveys, and is impacted by several factors, including the quality of the camera and the flight altitude. This means a greater area can be covered in one mission, or a mission can be completed quicker.įor instance, this graph shows the efficiency comparisons between the P1, Mavic 3 Enterprise, and the P4 RTK - showing the distance covered during a single flight. This helps to increase efficiency - collecting more data in a single flight. Likewise, the M3E's 4/3 sensor takes in more than the P4R's one-inch sensor. Look at how a full-frame sensor (orange box) can take in more data in a single shot compared to small sensor sizes, in this case, the Mavic 3 Enterprise's 4/3 sensor (khaki box) and the Phantom 4 RTK's 1-inch sensor (grey box). The P1 camera and the Sony a7R IV (used with the Gremsy Pixy SM gimbal for M300 RTK Series) have full-frame sensors. This is demonstrated in the graphic below. In general, larger sensor sizes tend to capture more light and result in higher image quality - capturing more detail, exhibiting better dynamic range, and performing well under low-light conditions.Ī larger sensor size captures a larger area in a single image, reducing the number of images required to cover a given survey area. The sensor size of a drone camera refers to the physical dimensions of its image sensor. After all, clear and detailed images enable precise feature extraction and facilitate the creation of accurate maps and models. Opting for a better quality camera ensures the fidelity of the captured data and can help increase the efficiency of the mission. Numerous factors come into play when choosing a camera for drone photogrammetry, but some of the most crucial aspects include sensor size and resolution, the shutter, ISO, and aperture. Image Quality: Unleashing the Power of DetailĪ high-quality camera is essential for capturing sharp, detailed imagery that forms the foundation of accurate photogrammetric outputs. This article will focus on the M3E's wide-angle camera, as this has been specifically designed for aerial surveying. Please note that the DJI Mavic 3 Enterprise has a wide-angle camera and a Tele camera. We'll also look at some of the best solutions available, including the DJI Mavic 3 Enterprise, the P1 camera and the Sony a7R IV which integrates with the high-precision Gremsy Pixy SM mapping gimbal to be used with the M300 Series, and the older Phantom 4 RTK. In this blog post, we will delve into the importance of choosing a quality camera for drone photogrammetry and explore how it can elevate the results of your aerial data collection and increase surveying efficiency. While the drone itself plays a vital role, the quality of the accompanying imaging equipment is a crucial consideration and is integral to collecting reliable data during drone surveys.
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