Raster pictures make up the majority of the photos that can be seen online. The alternative is to convert the image to a vector using Adobe Illustrator if the raster image is too small for your purposes.Ī scalable image made from values rather than pixels is known as a vector image. But you can’t make them bigger without lowering the quality. I tried it with your image using a two pixel window and an approximate linear scale between 0 and 10 for X and Y axis and here is what I get : 1.0485631998258123 0.Raster images are composed of numerous components and are made up of individual pixels. I often used it in academic work when I only had an old pdf, or even just a book. WebPlotDigitizer is a great tool to extract raw data from a graph when you only have an image. Obviously you want to remove the extra coordinate lines, draw some new coordinates, fill the gap, change the color, add texts etc. The gap is not in the following screenshot.Įxpand the trace and ungroup it to be able to make edits. At least there's a small gap near the right end and a stray dot. Send it to back and align with the trace to see the possible faults. The treshold also is high to get the coordinate line snippets captured.Ĭopy and paste from Photoshop your original image. Here only the strokes are traced, not the fills. Your image is in the premiun class of the traceables. Unfortunately good automatic tracing is often impossible. I have used this software actively, but I'm still so clumsy of my hands that nothing beats a good automatic tracing. Paste them in place!Ĭopy the clean layer to the clipboard and paste it to Illustrator. Note the range selection sliders:Ĭopy few coordinate lines at different places of your original image to the cleaned layer for easy realignment. Again goto Hue/Saturation and adjust the brightness of cyan-blue range to extreme minus. That knocks the coordinate graticule to white, but the curve survives, altough gets some color variations due the unsharpness of the image. Give to the hue shifted channel blending mode = Divide. You can also shuffle the color channels, but that needs a good underhood knowledge, so adjust the hue. Make two copies of the curve layer, select the top layer, goto Image > Adjustments > Hue/Saturation and change the blue to red. This is the place where some brainwork relly pays off if the curve is complex or the underlying coordinates are dense. At first make a version that has only the curve. No problem because your image is quite clear. In this case, you'll get a very close approximation, although not exactly the same, but you can adjust it (or if the small differences don't matter, simple leave it as is!)īy doing this, I got this result (gray line is my version, overlapping yours) If you chose Option 2, select Technical Drawing (or play with custom values). If you used Option 1, simply choose the 3 colors option and it will render an exact line. Click on the graph to select it and go to Image Trace on the top of your screen. Once done, select your layer, then Blending Options -> Stroke and use Size:1 Position: Center Option 2: With Magic Eraser Tool, delete all the white. This will give you an slightly wider line. Option 1 (easier on Illustrator): Go to Filter -> Stylize -> Find Edges. If you have an image, it will be a bit more complex (well, a couple additional steps) and you'll need PS as well.Īssuming this is the case, open your image in Photoshop, then adjust curves until the grid lines disappear. ai file and it will be converted to vectors automatically. If you have data, this is very easy, just select the graph, copy it, then paste into a. Specify the rows and columns in your graph and hit okay. Then with the rectangle selected go Object>Path>Split Into Grid. To make that grid I would make a rectangle the same size, no fill and thin grey stroke. (I don't think those thin grey grid lines will survive the tracing, test and find out) Once you have the blue line separated you need to recreate the grid. This will give you a very crisp vector path that you can control shape and color. If not, use the magic wand tool to select everything that is the blue line, lock results and delete the rest, unlock blue line, group and use.Īfter tracing and expanding you can just start deleting stuff that is not the blue line until it is the only thing left.Īlternately, without tracing, you can carefully trace the blue line manually with the pen tool. The blue line may have survived the tracing intact and clean. After Tracing expand and upgroup the object. To get the blue line I would use Image Trace with setting High Fidelity Photo.
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