When I did your method, it did get rid of that blue colour cast that you referred to which is awesome, but it didn't let me alter the photo to view it in its "true colours".įor example, I averaged the RGB values for top right corner red tile in a photo and got R: 173.7 G: 64.2 B: 38.0. I tried your method, however, the colours on the colour card in the photo needs to match their true RGB values. Sorry - I've been away for the past little while and this project was set on the back burner. Thank you for any help you can give - I really appreciate it. I need the standard in this photo to match the true colour standard (could not provide due to low reputation!)so that the colours of the subject are accurately represented in the photograph. This is an image containing the subject and the standard for scale and colour reference. That Rob A made a while ago, but it doesn't quite work the way I need it to the colours of the standard in the edited photo don't match up to the true standard properly. I have tried the match histogram script that can be downloaded via this link I am using GIMP to try to figure all of this out, so references to it specifically would be more helpful than talking about Photoshop. Instead, I need some automated way (or semi-automated) to be able to run through the photos and accurately match the colour standards in each photo to the true colour standard, ensuring that the lighting/colouration in each photo overall is consistent throughout. I have a couple hundred photos that I have to analyze so manual tweaking of the colour curves will not do. The problem is that I cannot figure out how to achieve this - especially in a timely manner. I have a separate PNG of it and would like to use it as a reference for the other photos so that the colour/lighting can be matched up. I have a colour standard present in every photo, of which I know the precise colours. I need to compare the colours of subjects between photos, however the lighting between photos is not absolutely consistent and so the colours are inconsistent and skewed. I am working on a project where colour is an important component.
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