Stranica 135 [135]
OCR
cn A B 7 9) Move the endpoints of the line A21 (Figure 3-26) so that the line follows any of the edges of the Macbeth chart. The image will be rotated to straighten it. Zoom in or out of the image as necessary by pressing “+” or “-” (or “i” or “o”) respectively. Note that the image will update in real time, which may cause a slight response delay in larger images. File Edit View Tookits Help | input / linear | markup ( viscalb |uvicalb align | specden , falsecolour , uvistray uvkm viltray vikm results Papernem—newemenrers Eile View Help Image, 2629x3912 32-bit float, 3 bands, XYZ, 117.70 MB, 9.45x9.45 p/mm | ( 42, 3911) 10.9622 — 12.1818 — 17.2872 Magnification 1:6 VA - mark position of Macbeth in visible-light reflectance image a 01421) | straighten prompt | Put line along edge of Macbeth v A >) straighten image Ji i] | line Arrow on [B1 .straighten, image, AZ1.straighten. image) at (1992, 558), offset (-6, 636) enclose_prompt | Enclose the Macbeth with box S| angle [Rotate by: [90 degrees anticlockwise rotate_widget 0 box Markup_macbeth linear.313 | z Astat| 6B o (hire... | (W}che...| (P)vis... | Coram _| 3B uns... | Wl A... [dd FA... [dd Azt. [PH Aza [Soci Desktop [089320 SG 1512 Figure 3-27 10) Next, double left-click on the “box-image” thumbnail (Figure 3-27) and adjust the box A21 on the image view window so that it just encloses the chart. The selection appears in the “box” thumbnail. 11) Finally pick a rotation option from the drop-down menu in the “rotate” thumbnail (Figure 3-27) that orients the Macbeth chart correctly, with the white patch in the bottom lefthand corner. 12) Scroll right. Column B marks the position of the Spectralon diffuse reflectance grey scale or any number of Spectralon diffuse reflectance standards as available, from the image in B1. Note that this step is required for later workflows and can be omitted if only correcting visible-reflected images. 13) Double left-click on the “straighten_image” thumbnail to open an image view window (Figure 3-28). 14) Move the endpoints of the line B1 so that the line follows the edge of the Spectralon diffuse reflectance grey scale (Figure 3-28) or the available Spectralon diffuse reflectance standards (as in Figure 3-29). The image will be rotated to straighten it. Zoom in or out of the image as necessary by pressing “+” or (or “i” or “o”) respectively. Note that the image will update in real time. Version No. 1.0 127 Date : 14/10/2013
