Photoshop in-class exercises

1. GIF VS. JPEG

Open the image named “Redwoods.jpg” in Photoshop. Save it as a GIF in your folder (File > Save for Web and Devices > GIF > Save). Open the GIF you’ve just created in photoshop, alongside the original image. Zoom to 400% into both images. What do you notice?

Answer: The GIF is more pixelated.

2. PPI

Open the image named “Truck-300.jpg” in Photoshop. Go to Image > Image Size. Unclick the “Resample Image” box. Change the PPI (pixel/inch) number from 300 to 72. Save the image to your folder, renaming it as “Truck-72.jpg”. Open both images alongside each other. What do you notice?

Answer: I didn’t see much difference

3. PRESETS

Open the image named “Flower.jpg”. Choose “Save for Web and Devices” to experiment with saving them to your folder with different settings from the “Preset” menu (the dropdown menu on the top right) — JPEG high, JPEG low, GIF 128 dithered, not dithered, etc… What do you notice?

Answer: JPEG high shows more detail and texture than JPEG low. GIF 128 Dithered display’s the pic more like a pointillism drawing; the pixels are more visible. No Dither appears almost as a painting. The texture and the look changes with each setting.

4. RESIZING

Open the image named “Dog.jpg”. Go to “Image” > “Image Size”. Make sure the “Constrain Proportions” box is clicked. Change the width of the image to 600. Save the Image to your folder, renaming it as “Dogconstrained. jpg”. Re-open the original image. This time, unclick the the “Constrain Proportions” box before changing the width of the image to 600. Save the Image, renaming it as “Dog-notConstrained.jpg”, to yourfolder. What do you notice?

Answer: Not constrained is very distorted

5. CROPPING

Open the image named “Dog.jpg”. Crop it, but make sure the viewer can still understand that the picture is that of a dog. Use the “Markee” tool (Left menu, 2nd from the top) to select the area you would like to crop. Go to “Image” > “Crop”. Save the image to your folder, renaming it “Dog-cropped”. Include this image inyour blogpost.  

Answer: Please see image.