Experience PS CS2 enhanced image processing capabilities

Photoshop CS2 has a number of enhancements in image processing capabilities, and we look at it carefully below.

One, support 32-bit High dynamic region (HDR) image

Although the innovations in photography have largely overcome technological limitations over the past 150 years, dynamic regions remain one of the technical limitations that have not been overcome for many years. Now, however, the presence of the "merge to HDR" (Merged to High dynamic area image) feature in Photoshop CS2 this limitation.

About dynamic zones (Dynamics range)

The dynamic region refers to the range of the number of levels of the darkest and brightest shades of the image. In the visible world, this area is far beyond the human visual range, but also beyond the print or screen output of the image can be displayed. But the human eye can only observe markedly different levels of brightness, and most cameras and computer monitors can only capture and reproduce a specific range of dynamic regions. Photographers, filmmakers, and others who use digital images must choose what is most important in a scene, because they are faced with a limited dynamic region.

About high dynamic zones (HDR)

High dynamic area images open up a new world because they can represent the entire dynamic region of the visible world. A real-world scenario in which all lumen values are stored in an HDR image and are balanced, adjusting the exposure of an HDR image as if it were being photographed in the real world. This ability allows us to create blurry effects that look very real and their real-world lighting effects. At present, HDR images are widely used in movies, special effects, three-dimensional works, and some high-end photography.

in P using HDR in Hotoshop CS2

The following tools, adjustments, filters can be used in Photoshop CS2 to handle 32-bit HDR images.

• Adjustments (adjust): You can use the image "" image → "adjustments" (image → Adjustment) in the channel Mixer (channel mixer), Photo filter (Photo filter), exposure (exposure) command.
• Blend Modes (blending mode): Normal, Darken, Multiply, lighten, Linear Dodge, difference in mixed mode.
• Image editing commands: include padding, strokes, free transform, transform, image size, canvas size, rotate canvas, cut and trim.
• File formats: Includes PSD, PSB, HDR, PFM, OpenEXR, TIFF.
• Filters: Includes average, Box Blur, Gaussian Blur, Motion Blur, radial Blur, Shape Blur, Surface Blur, Add noise, fibers, Lens Flare, Smart Sharpen, Unsharp Mask, De-interlace, NTSC Colors, High Pass, Offset.
• Color mode: RGB, grayscale, transform to 8-bit/channel or 16-bit/channel.
• Tools: Marquee tool, move tool, lasso tool, cut tool, slice tool, clone Stamp tool, History brush tool, path selection tool, direct selection tool, pen tool, annotation tool, eyedropper tool, color sampling tool, measurement tool, hand tool, zoom tool. Some tools are supported only in mixed mode.

Practice: Using Merge to HDR merges the HDR image

Write so much basic knowledge, is the paper, or to practice, to see how the use of HDR. Observe the following three pictures that you can store in a folder and prepare to do the following "merge to HDR" (merged into a high dynamic area image) exercise.

First step: Start Photoshop CS2, select menu command "File" → "Automate" → "Merge to HDR".

Step two: In the Merge to HDR dialog box, click the Browse button, locate the three files you saved, select them all, and then the names of the three files appear in the dialog box, as shown in Figure 33. Click the OK button.

Step three: Set the exposure time for the first darkest picture in the Manually set EV dialog box as 1/125s, as shown in Figure 34. Click the right arrow to set the exposure time for the second to third picture to 1/15s and 1/2s respectively. Settings Complete Click the OK button.

Step fourth: In the next occurrence of the Merge to HDR dialog box, select the source picture you want to use again on the left. The source picture needs at least three. Note If you want to save the image as an HDR image, you must select Bits/channel in the Bit Depth list on the right. Click the OK button.

As shown in Figure 36, the merged HDR image.