I've seen the colortemp script and tied the GEGL Color Temp tool, but in each case it asks for the original temperature. Yes, changing the color temp is an approach. * Curves adjust Values (lower left & raise right), then select and Raise Red, then select and Lower Blue curve…. * Levels – Auto (White balance) or manual White Balance…(this is optional) Typically by increasing the red, reducing blue using Curves and then adjusting the overall value by using an S curve.To do this open the Curves tool, select Red and pull the center of the curve up, then repeat for Blue pulling the curve down, then set on Values reduce the lower left slightly and raise the upper right slightly.this reduces the shadows and increases the highlights.this is the classic S curve. or try Tools->Gegl-Operations.->Color Temperature Maybe changing the color temperature helps a bit: PhotoComix_Mandala edited this topic ages ago. Or get a slight difference swapping the layers and setting the original to hard light (that similate Overlay mode, that called overlay in Gimp is a clone of Soft light ) You may experiment variation from yellow to orange, The camera filters subtract part of the light, but overlay mode don't do exactly that so i doubt that the exact hex value of the original filters will help much I don't delete the old reply but i will look there, first I was wondering if anyone had a the hex values for the colors that match the most popular warm up filers.īut look to Colors Filters Pack seems what you wish Out of the top of my head I would probably fill a layer with some warm color (such as an orange) set it's mode to overlay and adjust the opacity to my taste - or use the the layer mask to selectively warm up parts of the image. I was wondering if anyone had any suggestions on how to simulate a warm-up filter on an image in GIMP?
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