November Topics and Vocabulary:
Creating
your own patterns
Creating your own brushes
Replacing
colors in an image
Enhancing
images using Brightness and Contrast
Enhancing
images using Levels and Auto Levels
Resolution
& File Formats (including pixels, megapixels, multi-megapixels, pixelated,
interpolation, photorealistic, compression - "lossy" and "lossless," file formats: JPEG, GIF, QuickTime,
PNG, TIFF, BMP or DIB)
Crop
Tool
Custom
Shape Tool
Reviewing
other Tools
Reviewing
Blending Options (Layer Style)
RESOLUTION & FILE
FORMATS
- The first step in retouching or editing a photograph in Photoshop is to make sure that the image has an appropriate resolution. The term resolution refers to the number of small squares, known as pixels, that describe an image and establish its detail.
- Resolution is determined by pixel dimensions, or the number of pixels along the width and height of an image. In computer graphics, there are different types of resolution: but I just need you to focus on the number of pixels per unit of length in an image, which is called the image resolution, usually measured in pixels per inch (ppi).
- An image with a high resolution has more pixels (and therefore a larger file size) than an image of the same dimensions with a low resolution. Images in Photoshop can vary from high resolution (300 ppi or higher) to low resolution (72 ppi or 96 ppi). The more pixels and image has, the better the resolution or quality of an image.
- Image resolution describes the detail an image holds. The term applies equally to digital images, film images, and other types of images.
- Sometimes the number of pixels is called the resolution, because a pixel count provides a guide to the resolution of the camera and the pictures it will produce.
- Resolution refers to the number of pixels in an image. Resolution is sometimes identified by the width and height of the image as well as the total number of pixels in the image. For example, an image that is 2048 pixels wide ad 1536 pixels high (2048 x 1536) contains (multiply) 3,145,728 pixels (or 3.1 Megapixels).
To learn how to replace the color of one item in an image, go to page 53
in the Adobe Photoshop CS6 Book. Practice doing this with a picture of your
liking. You can change the color of an outfit, a hat, eyes,
etc. Go to Google Images and find images with good resolution, then
use the Color Replacement Tool in Photoshop (you can find this tool
with the Brush Tool) and follow the instructions.
You can use the Crop
tool to trim, scale, or straighten an image. You can enhance images by using
the Brightness & Contrast option (under Image > Adjustments
> Brightness/Contrast).
Review:
Free-Transform (Command-T), Move Tool, Rectangular and Elliptical Marquee
Tools, Eraser Tool, Brush Tool, Magnetic Lasso Tool, Magic Wand Tool, Paint
Bucket Tool, Gradient Tool, Custom Shape Tool and Type/Text Tool. (Check Tools
Panel Overview pages 39-42)
Selection Tools:
Rectangular and Elliptical Marquee Tools, Lasso Tools, Magic Want Tool and
Quick Selection Tool. (Check page 68)
Also review:
how to duplicate layers, how to deselect selections, how to merge layers, how
to create a frame on a Photoshop document (two ways, one on page 117), how to
open the Layer Style window (for Blending Options) – two ways, how to convert
psd. documents into jpegs, how to change the opacity of an image and how to
flatten images (.psd remains but layers are merged, page 118).
What are pixels,
megapixels, multi-megapixels, and file formats (per PowerPoint)? Check the
PowerPoint in Google Classroom.
- Pixel – in digital imaging it means “picture element” (pix for picture – the smallest dot or square in a digital image). A pixel is generally thought of as the smallest single component of a digital image.
- A Megapixel – a million pixels. The term is used not only for the number of pixels in an image, but also to express the number of image sensor elements of digital cameras.
- Multi-megapixels – more than a million pixels.
If you have any
questions, please feel free to ask me. You will have a test at the end of this
month before Thanksgiving. Thank you!
