The Tolerance sets how similar a pixel color should be to the sample color for it to be erased in the eraser stroke. You can always undo the action then change the sampling mode to Test strokes to see how the eraser behaves in the area you want to remove. The sample color will only change when you change the background color.Ĭhoosing the correct sampling mode goes a far way in getting acceptable results with the background eraser tool. It is the only mode where the sample color is not changed when you use the mouse on the image. This mode sets the sample color to the background color swatch. The Background Color is the final sampling mode option. The green and blue areas are not erased because the background eraser is only checking against the initially set red sample color. The sample color never changes which is shown below by the small red dots in the center of the stroke. The image shows the result of stroking starting in the red area then dragging through the green then blue regions. The sample color will remain constant as long as you keep dragging However, continuous sampling is particularly useful when there are variations in the color of the area you want to erase.Ĭolor is set to the pixel color at the center of the brush when you press the mouse to begin the stroke. When erasing in continuous sampling mode you have to be careful to avoid drifting into and erasing the region you want to keep. The green and blue areas in the background eraser stroke will be erased respectively because the background eraser is always updating its sample color to match the area it is in. Subsequently drag through the green then blue areas, the sample color will change to green then blue based on the color under the center of the brush as shown by the dots in the image below. If you start dragging in the red area then In Continuous Sampling mode the sample color is automatically updated as long as you are dragging in the image. To set the sampling mode click to open the 'Sampling'
The sampling mode is important because itĬontrols how the background eraser tool erases when it strokes the image. How the sample color is set is determined by the 'Sampling' mode in the tool options bar. User set Tolerance the pixel is erased, otherwise it is left unchanged. If the difference between the pixel in the stroke color and the sample color is within a It compares the color of the pixels in its brush stroke to a set Similarity to decide what pixels to erase in the image. Unlike the regular eraser tool that blanket erases everything in its stroke, the background eraser tool is selective. Makes them more or fully transparent, what we call 'erasing'. So if the eraser lowers the alpha of pixels in its stroke or sets it to zero, it Like the eraser tool theīackground eraser is a brush tool that reduces the alpha value of the pixels in its stroke. To use the background eraser tool effectively you need to understand how it erases pixels. The background eraser tool is a color based eraser. This is what the background eraser tool uses to remove parts of an image. What you use to decide what is sand in the image The sand in the background of the beach ball you are effectively removing the background. It simply erases the areas of color that you choose to be the background. Remove backgrounds in the strictest sense. This leads to the question, "Well, how does the background eraser tool remove the background?" The answer is the background eraser does not The parts of an image is purely subjective depending on what you want to extract from the image. Two butterflies in a field of flowers, a beach ball and bucket in the sand, each scene has its own complexity of background and subjects. If you have five different pictures you can have five completely different and valid backgrounds and several subjects. Or what you would classify to be the subject for that matter. Some artificially intelligent tool that can determine by inspection what in an image you would consider to be the background, For starters, let us define what the background eraser tool is and what it is not.
0 kommentar(er)
