![]() Selecting a layer within a mask group and choosing Layer > Mask > Ignore Underlying Mask will keep it within the group, but stop it from being affected by the mask. When you have multiple layers selected, control-clicking on your selection will also give you the Mask Selection option. Note: If the image contains any Alpha (transparency) values, and is the lowest layer, Sketch will assume you want to use the image as the mask. Sketch knows that you want to Mask the image with the shape and creates a Group with the Layer now underneath the Image and masking it. In this case, you can draw it on top of the Image and then select both the shape and image and use Layer > Mask > Mask Selection. This will use the shape at the bottom of the Layer List within your selection as the mask and automatically group them all.Īn exception to this rule is if you want to mask an Image with a specific shape. If you select multiple layers at the same time, you can mask them all at once by choosing Layer > Mask > Mask Selection. You can also group your masked layers and the mask itself so that anything outside of that group isn’t affected. If you want to place objects above your mask layer but don’t want them to be included in the mask, select it and choose Layer > Mask > Ignore Underlying Mask. You can remove the Mask from a Layer by selecting the Layer and selecting the Use as Mask option again from either the context menu or the Layer > Mask menu option.īy default Masks will be set to use Outline masking Mode, you can change this to Alpha masking using Layer > Mask > Mask Mode > Alpha Mask. If you drag another layer or group above the mask, it will also be affected by it. The icon for the masking layer itself will appear without a fill in the Layer List. When you create a mask, we’ll add icons to any layers or groups above it in the Layer List to show that they’re being affected by the mask. Alternatively, you can control-click on the shape and select Use as Mask or use the ⌃ ⌘ M shortcut. Select a shape on your canvas and choose Layer > Mask > Use as Mask. How to create a simple MaskĪ Mask in Outline mode only shows parts of a layer or multiple layers that fall within its shape. There are a few different ways to create masks in the Mac app, but they all follow the same rule: we’ll use the shape that’s lowest in the Layer List as the mask. Sketch supports two specific types of mask modes, Outline and Alpha, and you can create them from all types of Layers (including images). You can create simple Masks and Image masks, or let Sketch help with masking using selections. But, mask for which color? To answer the question it would be good if we plot the histogram for our hue/color channel.You can use Sketch to create Masks in several ways depending on your needs. The idea will be to create a color range binary mask either for the background or foreground and then use that mask to selectively apply the color change to the foreground. Note, there are other deep learning-based techniques like GANs that also can be used to achieve the same, in this article we only talk about simple image processing techniques that solve the problem. Let’s examine how we can only change the color of the pen or only change the brightness of the foreground without changing the background. In earlier images also, we saw changing the hue value resulted in a change in the background color. ![]() Multiplying the brightness channel by 0.6 (darkening effect) also resulted in the darkening of the background. We saw how modifying different components helps us transform the color component and brightness of the image separately. Image by Author.Ĭlearly, it was quite easy to play with different components in an HSV color space. We might want to try some cool stuff like swapping the background color while attending a meeting, adjusting the color of the shirt, etc.įig: Image obtained by lowering the brightness component.So, when image data is limited, these image processing techniques can come quite handy in the generation of good quality synthetic images. Many times it is quite challenging to find a real-life, open-source, large dataset to study the algorithm on, in such cases the use of synthetic data can become quite helpful.As a data science practitioner, we might wanna use the color swapping method as a data augmentation strategy, which helps in increasing the amount of data while dealing with deep learning algorithms.There can be several reasons why color swapping might be of interest to Data Scientists: In this article, I try to explain my exploration of why there can be a need to swap colors in images and how we can use simple image processing methods to smartly swap colors in an image by implementing the same in Python.Ĭolor Swapping simply refers to the idea of substituting a specific color/colors in an image with some targeted color for the purpose of exploration, design, image creation, etc. ![]()
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