Increasing it will make more colors in the selected spectrum more opaque.
Transparency threshold: this controls the intensity of the transparent areas.Within the Color to Alpha menu you will see two adjustment sliders: This is where the threshold sliders come into play. However, as you can see in my example image, there is still some discoloration in the shirt, meaning there are white pixels that still need to be selected. Step 5: Adjust the opacity and transparency threshold as neededĪt this point we are nearly finished. You can also click and drag over your image to see how each of these colors react in real time. Seeing as how your image will most likely have lots of different colors you’d like to remain opaque, you may have to select several different colors to see what gets the best result.
To do so, click on the last dropper icon at the bottom of the list, labelled “ pick nearest full-opacity color” when you hover your cursor over it:Ĭlick on an area of the image that contains colors that you’d like to remain fully opaque. Now that you’ve told GIMP which pixels should be entirely transparent, it’s time to tell it which pixels should remain fully opaque.
Step 4: Set the nearest full-opacity color You should notice that your selection is beginning to appear more accurate in the preview window. For my example, I’ll be clicking on the whitest area: Use this tool to select the brightest area of your image that contains the color that you’d like to make transparent. Within the menu, select the middle dropper icon labelled “ pick the farthest full-transparency color” when you hover your cursor over it: This is where the Color to Alpha tool begins to shine. Ideally, you’d want to make all similar colors transparent as well.įor example, the color of the shirt in my image is white, but there’s many different grayscale shades that need to be made transparent as well, otherwise the shirt wont be entirely transparent. Seeing as how nuanced the color composition of images can be, chances are you don’t just want to make a single color transparent. Step 3: Set the farthest full-transparency color
GIMP MAKE BACKGROUND TRANSPARENT CODE
Alternatively, you can also click on the white stripe to manually input a color code if you prefer to do it that way.įor this example image I will be making the shirt color transparent, so I clicked on the area of the image where the shirt is. With the dropper selected, click on the area of your image that contains the color you’d like to make transparent. It’s the first item at the top of the list, located next to the white stripe: The dropper icon to select is highlighted in red. To pick the color that you’d like to make transparent in GIMP, click on the dropper icon in the Color to Alpha menu labelled “ pick color from the image” when you hover your cursor over it. Step 2: Pick the color that you’d like to make transparent Lighter areas become more transparent, whereas darker areas remain more opaque. The reason why this happens is because by default, the Color field in the Color to Alpha menu is white (as indicated by the white stripe in the menu.) This means that the white portion of all of the colors in your image are reduced to transparency based on a scale of how much white the color contains. Once opened, you should notice that a large portion of the image on your canvas becomes partially transparent: Your image may look something like this when you first open the Color to Alpha menu. To access this menu, navigate to Colors > Color to Alpha.
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