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The term _Photoshop_ is also often used as a verb to describe modifying images in other ways. You might say someone's picture is "Photoshopped" or "Photoshopped up." People will sometimes modify images on a web page before printing or uploading them, so you'll see the term _Photoshopped_ on the page.
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Although Photoshop is primarily used for creating and editing images, there are many useful features for when you need to apply a filter, web designer, or other image editing filter, and even for when you want to make some textual changes in your images.
Part 1: Basics of Photoshop
You can edit images in Photoshop using the Program tab, or using the shortcuts in this article. You can use these shortcuts to adjust Image Size, Picture Style, Tint, Black Point, Convert to Grayscale, Unsharp Mask, Levels, Curves, and many other Photo Editing tasks.
Let's start with a basic step-by-step tutorial on how to find and make an adjustment using the built-in adjustments in Photoshop. For the purposes of this tutorial, we will use a picture of a red-orange banana as our example. You will first download the picture and make a selection for the red-orange portion. You will then make a choice of which adjustments to use.
Step 1: Open a new Adobe Photoshop file
Click on the File menu, and then click on Open. Click on the image that you would like to work on. Click Open. (Remember to click on the one you want to work on)
Step 2: Open Image Size Adjustment
Click on the Image menu, then select Image Size. Double-click on the icon that looks like a small window with an arrow pointing down inside of it. A menu will open with lots of options. One of those options is Select. Select the Create a New Size option.
Step 3: Select and Cut the area you want to make an adjustment on
To cut out the area you want to make an adjustment on, click where you want to start your selection. Click the Crop tool. Click the box in the middle of the screen that appears. Click anywhere inside the box that has lines around it. When you have selected the area that you want to make an adjustment on, press Ctrl and click on the box that is surrounded by a dotted line. The dotted line will disappear. Click inside the box that is surrounded by dotted lines. (The dotted lines stay with the box until you click outside of the box)
Step 4: Choose one of the adjustments you want to make
You may choose any of the adjustments you want to make using the Crop tool. Click on the Adjustments button. You should see an icon that looks
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How to find the point belonging to a sphere for a given radius in OpenGL?
I'm trying to make a simple 3D projectile game. For this game, I'm using OpenGL for rendering. I know how to calculate the vectors from the center of the sphere and the direction of the player. I know the position of the cursor on screen after zooming to the bullet. What I'm trying to figure out is how to find out which point on the screen is the closest to the cursor position.
This is basically trigonometry.
If the radius of the sphere is r, the coordinate of the mouse location is p, then the point on the sphere closest to p is:
p = r * sin(θ) * sin(φ) * cos(ψ) + r * cos(θ) * sin(φ) * cos(ψ) + r * cos(θ) * cos(φ) + r * sin(θ) + r * cos(φ) + p
The coordinates of the point on the sphere closest to the mouse location are, in that same order:
θ = atan2(d.x - p.x, d.y - p.y)
φ = acos(d.z / sqrt(p.x*p.x + p.y*p.y))
ψ = acos(1 - d.y / sqrt(p.x*p.x + p.y*p.y))
where d is the vector (p - center of the sphere).
If you have a nested for loop:
for(int i = 1; i
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The liquify tool allows you to smooth out images and adjust the distortion of an object.
The basic B&W tools allow you to apply various filters to B&W images. Adobe has created B&W filter sets that make it easy to apply basic B&W filters to black-and-white images.
The "advanced" gradient tool allows you to change the color gradient in a work area, whether the image has color or only B&W or grayscale.
The "color" and "monochrome" blend modes let you blend color and grayscale or monochrome images. For example, you can overlay a grayscale image and leave the parts that are transparent in color.
The "Hue/Saturation" tool allows you to make gradual changes to the saturation or hue. You can adjust the "A" or "B" (upper or lower color temperature), plus you can make it more or less gradual.
The "colorize" tool allows you to change colors in an image. You can use it to make effects like healing, brightening, or darkening.
The "levels" tool is designed to adjust the luminance (brightness) and contrast of an image.
The "mixer" tool is designed to blend two layers or an image and a layer. You can add or subtract portions of the two layers to create the final image. You can also use it to make fine adjustments to colors and grayscale.
The "Perspective" tool allows you to align the perspective of an image, which can be helpful when aligning images in a panoramic format. You can use the "free transform" tool to stretch, pull or rotate an image in the work area.
The "smart guides" are bar-like indicators that appear during transformations. You can use them to align objects or paths in a canvas, including rotating and scaling.
The "transform" tool lets you change the shape of the work area, adjust the position of the canvas, and move the work area to another location.
The "white spot" tool helps you spot mistakes, and it also improves white balance by using the same white-color-like setting as the background.
The "warp" tool lets you stretch or distort images by creating a pattern overlay. You can use it to create image mosaics, title screens, posters, or more.
The Nikon D810 is a full-frame
Operating Systems: Microsoft Windows 7, 8, 8.1 (64-bit)
Processor: Intel Core i3 or better; AMD Phenom II X4 940 or better
Memory: 2 GB RAM
Graphics: NVIDIA GeForce GTX660 or better, or AMD Radeon HD7870 or better
Hard Drive: At least 20 GB available space
Sound Card: DirectX compatible sound card
Additional Notes: We recommend running the game in DirectX 11 mode, to achieve best performance.
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