4/16/2023 0 Comments Lumiere macfunOK: Applies the glow effect on the image. Status: Displays statistics pertaining to the image processing. Realtime: Applies all effects (in realtime) on ‘mouse drag’ instead of on ‘mouse release’. Splitscreen: Divides the preview window to show an unprocessed and processed image for side-by-side comparison. The preview window size will directly affect Lumiere’s performance.įit: Fits the preview image within the preview window. Zoom: Specifies how large to display the preview image. Progress Bar: Displays the progress of the current glow effect. Output (Red, Green, Blue): Specifies what color channels to output. If you introduce chromatic aberration and the glow appears pixelated, set the sampling mode to bicubic. Sampling: This drop-down controls what type of sampling to use for features that use scaling functions such as chromatic aberration. All these modes operate in the same manner as the industry standardized blending modes. An example might be isolating a specific section of fire that requires glowing while the rest does not, or isolating a moon’s glow from the rest of the sky glow.Įnable Mask: This button will toggle masking capabilities for isolated glows.Ĭomp Mode: This drop-down specifies how to composite the glow effect (Add, Dodge, Lighten, Screen). This allows the artist to select only a specific area within a selection range. Masking is one of Lumiere’s most powerful features. For instance, on an image with a red moon on a blue sky, the red color channel may be selected for the algorithm which will automatically select only the moon pixels.Īlgorithm (R+G+B)/3: The intensity is derived from the red, green and blue color channels added together and then averaged.Īlgorithm (Red), (Green) & (Blue): The intensity is derived from the respective color channel.Īlgorithm (H)LS, (Y)UV, (Y)CBR: The intensity is derived from the respective color space luminance channel.Īlgorithm (R+G)/2, (G+B)/2, (B+R)/2: The intensity is derived from the two respective color channels added together and then averaged. The most common is an average of all three color channels but sometimes it may be useful to use a specific color channel instead. The selection algorithm specifies how Lumiere should calculate which pixels to select for diffusion. Left: Source image, Right: glow threshold selection Pixels with a luminance value greater than this threshold and less than the upper threshold will be selected for diffusion. Lower Threshold: This slider controls the lower tolerance for selection. The diffusion is additively composited with the original image using a specific blending mode to produce a diffused glow. Certain coloring operations can also be performed at this time to generate a suitable diffusion. This blurs the selection to a specific size. These pixels would generally consist of the brightest pixels in the image such as a light or sun, and the upper threshold would generally be left at 255. A typical workflow is as follows: a selection of pixels is first specified using the lower and upper threshold. These sections have been logically separated into their own panel groups in Lumiere’s GUI for the sake of clarity and ease of use. First is selection, next is diffusion and final is output. Lumiere performs it’s operations using three logical steps.
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