Utilizing Photoshop for quantitative data collection and analysis

Many times researchers use rating information to attempt to differentiate plant damage in experiments. There are problems using rating data for this purpose including personal biases, qualitative differences among raters and the intrinsic unsuitability of these data for parametric statistical analysis. While image analysis programs are available, they are generally very expensive and difficult to master. This presentation demonstrates how the commonly used image editing program, Photoshop, can be used to quantify plant damage, make insect counts and collect data.