![]() You find a row of notebook tabs named after color channels: “L”, “a” and “b” for modules that act in Lab color space “gray”, “red”, “green” and “blue” for modules that work in RGB color space. You see the already familiar controls (blend mode, opacity) plus a new checkbox that says “blend if …” If you toggle that box, a further control area appears beneath. A first lookĮnter a module that supports blending, like “tone curve”, and activate blending with the corresponding checkbox. Don’t be afraid we look at it step by step and you will quickly become comfortable with it. This gives a lot of power for a very detailed control, but it might at first appear a bit complicated. With each of up to four color channels, both independently for the input image and the output image, we can decide to what extent pixels should be blended or not.Īs this is done with four parameters for each channel, you are in the position to juggle with up to 32 values. This one does not use geometrical but color coordinates to control blending effects. Today I want to present to you an alternative technique available as a development branch in git called “blendif” (soon to be integrated into master for the new development round after darktable 1.0). A corresponding method using layer masks is currently under development in darktable. Obviously we could do this based on geometrical coordinates on the image plain. However, there are cases when this is not enough, because we want to limit the effect to certain parts of the image. The opacity slider already gives us some very nice control. We already used this technique here to tone down the effect of shadow recovery. In-between opacity values allow to gradually blend the effect of this module into the original image. If opacity is 0% the upper layer is completely transparent, you see the input image as if the module has no effect. If opacity is 100% the upper layer will completely mask the lower one you get the full effect of the module. The lower one represents the input image, the upper one is the original output of our module (the one we would get without blending). Think of this as a layer of two transparencies. Depending on the setting of slider “opacity” this allows to control the strength of a module’s effect. In many cases it is the most basic blend mode “normal” that we want. As an example refer to here, where we took blend mode “overlay” with module “lowpass” to do shadow recovery. Based on the blend setting they will take their original output together with their input and do a re-processing. Instead of just handing over their result to the subsequent module in pixelpipe, “blending modules” take a moment to reconsider. ![]() Diligent readers of our small blog series are already aware of the blending feature that darktable offers as part of many modules.
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![]() Plus no more fumbling around looking for a loonie, no ending up in the automated lane and realizing you have no change, and no missing the basket when you try to throw it in. Having one also reduces the cost per crossing the bridge from $1 to 80 cents. Transponders are free, they can be ordered online and delivered to your home for no charge. I don't use the bridges very often, why should I bother getting a MacPass? Ninety per cent of users either pay by credit card or through their chequing account. "You can set it up from a credit card or a chequing account to pay for your tolls," explained MacDonald.Ĭustomers can also pay cash if they pop into customer service centre on Princess Margaret Blvd., but there will be an additional monthly service fee for that option. ![]() "You put a certain amount down onto your account and as that amount goes down, once it gets to a certain threshold, you put more money into your account."ĭo I need a credit card to pre-pay for my tolls? There is no cost for the actual transponder, however customers do have to pre-pay their tolls. "One of our customer service representatives would be more than happy to set you up." ![]() 5:30 p.m., which is located at 471 Princess Margaret Blvd. She said another option is to pop into their customer service centre Monday to Friday from 8:30 a.m. "You don't have to pay for postage, you don't have to pay for the transponder, we'll cover all of that. "One will be mailed out to you," said MacDonald. The easiest way to go to and fill out an application. They've also launched an online survey asking Haligonians who don't have one, why not, and those who do, what they do and don't like about the program.Ĭomments on our Facebook page indicate there's a lot of questions and confusion when it comes to MacPasses, so we partnered with NEWS 95.7's The Sheldon MacLeod Show to get some answers from Halifax Harbour Bridges communications manager Alison MacDonald. HHB is currently in the preliminary stages of studying the viability of going cashless.Įarlier this year, cameras were installed in each of the cash lanes on both the Macdonald and MacKay bridges to get a better idea of where those who pay by loonie to cross the harbour are from. Earlier this week, HalifaxToday.ca posted a story on Halifax Harbour Bridges surveying customers about their MacPass program. |
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