How Tests are Conducted for a Comparison of Video Cameras
Video cameras comparison tests are the essential benchmarking techniques that are used by most of the reviewers while suggesting the best brands or cameras. Learning about video cameras comparison tests and techniques can help you understand the technicalities that finalize your decision to buy a particular video camera.
Most of the video cameras are tested by shooting a lot of video footage under varying conditions like under indoor-color-balanced tungsten lighting, low-light conditions, vivid colors, high contrast scenes, daylight-color-balanced HMI lighting and field-testing. Here is a brief introduction to some of these basic methodologies.
Image Quality Testing
The first of the tests is a noise test that is conducted by shooting a X-Rite Munsell Color Checker Chart target under daylight-balanced lighting. This is followed up by extracting the frames from video footage and scrutinizing them under image analysis software for color and luminance levels.
This is followed by color reproduction ability and the image sharpness tests using daylight-balanced HMI lighting. This is done by using the lowest compression ratios on the camera setting and exploiting the highest native resolution offered by the video camera. Also carried out are the tests for colors and textures under tungsten studio lights with three different white-balance settings.
Image Quality Characteristics
The images are then tested for white balance levels and corrections, exposure, color saturation and dynamic range. These tests involve judging the neutrality of the white and gray colors in the image and the quality of shadows being produced.
Such tests generally require precise testing equipment and labs that can simulate various lighting conditions.