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MATLAB tool.
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Colour picker and data extractor from colour bar, colour map and heatmap plots.
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I have used this tool to extract data from figures of scientific papers.
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It can be used as a tool to (preliminary) estimate and evaluate data during systematic reviews and meta-analysis.
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myDemo01.m
-Main routine. Use this file to configure and run your experiment.
-variable "myTargetImage": path to the image that you want to explore and pick values using the mouse.
-variable "myColorBarImage": path to the image that you want to use as reference colour bar. Linear scale.
-variable "myColorBarImageLowValue": scalar value representing the lower value of the reference linear colour bar.
-variable "myColorBarImageHighvalue": scalar value representing the higher value of the reference linear colour bar.
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mouseMove.m
-Routine that is executed every time you mouve the mousse over the target image.
-You can use the custom "myKnnSearch.m", native "knnsearch.m" or other multi-dimensional search criteria.
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myKnnSearch.m
-Routine that is executed to search the nearest colour (Euclidean distance) to the picked pixel in target image and estimate the corresponding colour bar value.
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Color_Bar.jpg
-Example of a colour bar.
-Colour bar should be oriented verticaly and represent a linear scale. Lower value at the bottom. Higher value at the top.
-Colour bar and target image should be both RGB images or grayscale images.
-Best option to get a good version of a colour bar is to printscreen the source of that colour bar: eg: a scientific paper.
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Sample_Target_Image.jpg
-Example of a target image, which is going to be explored by mouse.
-Colour bar and target image should be both RGB images or grayscale images.
-Best option to get a good version of a target image is to printscreen the source of that target image. eg: a scientific paper.