Adobe Lens Profile Creator User Guide-Books Pdf

Adobe Lens Profile Creator User Guide
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Table of Contents, INTRODUCTION 1, TERMINOLOGY 2, PROCEDURES 4. OPENING AND RUNNING FILES THROUGH THE ADOBE LENS PROFILE CREATOR 4. NAMING AND SAVING THE LCP FILE 11, APPENDING AN EXISTING LCP FILE 12. PREFERENCES AND OTHER OPTIONS IN THE ADOBE LENS PROFILE CREATOR 15. PLACING THE LCP FILE IN THE CAMERARAW LENSPROFILES 1 0 FOLDER 19. CONCLUSION 20, Introduction, This set of guidelines is designed to provide users of the Adobe Lens Profile Creator. with a procedure for running a set of calibration chart images through the tool to. generate a lens correction profile LCP, Calibration chart images must be captured by printing a calibration chart PDF file. and shooting the printed chart with the camera body and lens combination that you. wish to generate a lens profile for For optimal results with captured calibration. chart images please read the companion document titled Calibration Chart. Shooting Guide for the Adobe Lens Profile Creator, Once the calibration chart images have been captured the calibration tool analyze.
data from the images to create a customized lens profile for correcting geometric. distortion chromatic aberration and vignette, The procedure involves three basic steps. 1 Open up one or more sets shooting iterations of captured chart images. from a single camera lens combination, 2 Enter the proper camera and lens pretty names to identify the new lens. correction profile, 3 Input the chart dimension parameters. 4 Run the Generate Profiles command, 5 Create a new LCP or for appending to an existing LCP and place it inside the. lens profiles folder that Photoshop can find and load it. These guidelines are written for the photographer who wishes to create a lens. profile to make optical corrections to the images of the camera body and lens. combination that the given lens profile represents While written for the novice. user a basic knowledge of photographic and optical terms listed below is useful. for understanding these guidelines, Terminology, Adobe Lens Profile Creator The Adobe application used to generate Lens.
Correction Profiles LCP files, Lens Correction Profile LCP A file that contains information for Adobe. applications on how to apply lens corrections to a specific camera body and lens. combination, Geometric Distortion An optical aberration that bends the light rays that pass. through the lens particularly along the periphery of the image plane to create a. distorted looking image The most common forms of distortion are referred to as. barrel distortion and pincushion distortion because of the characteristic shape. of the distortion as it appears in the image, Lateral Chromatic Aberration An optical aberration that gives the appearance of. color fringing particularly along high contrast areas of the image This aberration is. caused by different wavelengths that make up white light being magnified at. different positions of the same focal plane, Vignette Light falloff at the periphery of an image giving the appearance of a. darker border along the edges of the image, Adobe Camera Calibration Chart A checkerboard chart that is photographed by.
the user to create a set of images to be analyzed in the Adobe Lens Profile Creator. Shooting Iteration A single set of images of the printed calibration chart shot. with the user s desired camera lens combination An iteration set of images. should have constant camera settings throughout and be of a single camera body. and lens model The lens should be set to a single aperture focal length and relative. focus distance focus should remain about the same from shot to shot for a single. iteration A typical iteration consists of nine images in the set Different iterations. may be shot and profiled for the same camera lens combination while using a. different aperture focal length or focus distance for each respective shooting. Focal Length non technical definition The zoom value of a zoom lens or a fixed. value for a lens which indicates how close or far away the subject or scene will. appear when viewed through the viewfinder display of a digital camera. Focus Distance The actual distance of the camera from the subject being. photographed In technical terms it is the distance of the subject to the sensor film. Zoom Lens A lens with a range of focal lengths typically adjusted by rotating a ring. on the lens, Fixed Lens A lens with a fixed single focal length. Rectilinear Lens A lens that generates a normal looking image matching closely. to the perspective of the human eye a non fisheye lens. Fisheye Lens A lens that generates a distorted image bending light differently. from a rectilinear lens to encompass a very short wide angle focal length The. corners of an image will appear distorted and squeezed in on a fisheye. Circular Fisheye Lens A special type of fisheye lens that creates a circular image. which covers only part of the whole image frame, Procedures. Opening and Running Files through the Adobe Lens Profile Creator. 1 File Add Images to Project, 2 Set the file path and select the type of files DNG JPEG or TIFF to add to the. 3 Select the image files and press Open, Note Instead of opening images through the menu images may also be dragged and. dropped into the application itself If attempting to drag and drop a group of. images that contain different file types such as Jpeg and DNG files a prompt will. appear asking which file type you wish to open All of the images for a single. project must have matching file types, 4 Preview the opened images Click on an image in the thumbnails strip to see.
the image in the larger preview area Use the mouse wheel or arrow keys to. scroll through the thumbnail strip, 5 Use the zoom tool to zoom in on the chart information of the image. 6 Once zoomed in note the checker of rows X of columns dimensions. listed as the Version of the chart and note the number of points for the. Square Print Dimension Use the hand tool to click hold and drag on the. zoomed image if you need to move the image to see this information. 7 Type in the checkerboard info in the appropriate data fields Version Row x. Column and Print Dimension Points, 8 Select the ruler tool Of all the images in the set find the image with the. smallest checker and measure this checker on its shortest dimension width. or length with the ruler tool, 9 When prompted click Yes to input this value into the Screen Dimension. Pixels data field If you checked the Do not show again option then the. program will remember your current automatic input preference and apply. it when you use the ruler tool for the next time You can reset the preference. from the preference dialog, 10 Input the name of the profile and the names of the camera and lens model of. the chart images in their respective Display Names data fields Depending on. the application these are the names that are displayed at the lens correction. tools So be as specific as possible For example you should include the name. of the creator and the lens when specifying the lens profile name When. naming the camera name and lens name use the make and model of both the. camera and lens to distinguish each from profiles that use similar equipment. For example if using a Canon EF 85mm f1 2 L USM Mark II lens input the. lens name Canon EF 85mm f1 2 L USM II to distinguish the lens from the. Canon EF 85mm f1 2 L USM Mark I or the Canon EF 85mm f1 8 USM. 11 Input the correct data for the chart images in the Calibration Settings. a Select whether the lens is Rectilinear or Fisheye. i Rectilinear includes all normal perspective fixed and zoom. lenses including extremely wide angle rectilinear non. fisheye focal lengths, ii Fisheye includes fixed zoom fisheye lenses and circular fisheye.
b Check whether you wish to generate a correction model for chromatic. aberration and vignette correction, 12 If the images in an image set were shot at different focus distances you. should separate those images into separate focus distance groups manually. You can drag and drop images but only one at a time from one focus. distance to another Alternatively a more efficient method would be first. placed the images in the Finder Explorer into subfolders appropriately. sorted by focus distance group mixed focal lengths and apertures in the. group is ok in this case then imported each subfolder of images separately. ALPC would automatically create a new focus distance group with each. 13 The calibration settings are hierarchical If you have imported multiple image. sets you can specify the calibration settings at the top camera lens image set. level or at the focal length aperture image set level or at the focus distance. group image set level The settings specified at the parent level will apply to. its child image sets at all levels You can override the parent settings at any. child image set levels, 14 Review your choices for profiling and click the Generate Profiles button. 15 Check the status bar to watch the progress of profile generation. 16 Check to make sure no grid detection failures occurred during profile. generation A red grid will appear on the failed chart image along with a red. warning icon next to the image file name, If you have at least three images in a set which passed grid detection then. you may still save a profile Images that pass grid detection will have a cyan. grid appear over the yellow grid to show the calculated correction. transformation The fewer images that pass grid detection the lower the. quality will be for the profile, Naming and Saving the LCP File. 1 Use the default generated name or enter a custom name for the LCP file when. prompted in the Save Profile window, 2 Select the file path you wish to save to The default save location will save.
the file to the location of the lens profile library that installs with Photoshop. The default save location can be changed in the preferences dialog accessed. through the Calibration Preferences menu command, Appending an Existing LCP File. A single shooting iteration of calibration chart images should cover a single camera. body with a single lens and all the images should be of a single focal length. aperture and focus distance If you wish to make customized correction data by. characterizing the optical behavior of a camera lens combination at different focal. lengths apertures or focus distances you must shoot separate iterations for each. change run the shooting iteration image sets individually and then append them to. a single LCP file A single LCP file should represent one or more iterations that share. the same camera body and lens model and have the same image file format DNG. JPEG or TIFF color mode RGB or grayscale and image pixel bit depths. Follow these guidelines for appending an LCP file, 1 Open one or more iterations of calibration chart images by selecting File. Add Images to Project Make sure the images you add are checked on and. any other images that were previously opened profiled are checked off or. 2 Enter or keep the same camera model and lens model name in the Profile. Display Names section as the profile that you wish to append to. 3 Enter new information in the Checkerboard Info section if a different. checkerboard was shot for the iteration, 4 Click the Generate Profiles button after reviewing the new profiling settings. Adobe Lens Profile Creator User Guide Version 1 0 Wednesday April 14 2010 Adobe Systems Inc

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