IPHandbook.gif (8380 bytes)

  UK  DE  FR
0201848406_m.gif (5231 bytes)
  UK  DE

  UK  DE  FR

Delphi Graphics: Algorithms
A. General Graphics B. Color C. Image Processing D. Mathematics/Geometry

AmazonTechnical.gif (2495 bytes)  in   look for 

Delphi Graphics
Image Processing

Also see Image Processing Reference Library

General Image Analysis Tools

Envision Image Library provides image file I/O for popular file formats (TIFF, PNG, JPEG, BMP, PCX, TGA, ICO, WFM, EMF), printing, scanning and image processing features.  Twain scanning. Image processing: anti-aliasing, brightness, contrast, convert to gray, edge detection, emboss, sharpen, flip vertical and horizontal, gamma adjustment, negative, interpolated resize, rotate 90, 180, 270 and arbitrary angle, cropping, format conversion including Floyd Steinberg dithering and color quantization. For Delphi 3, 4 or 5, or Builder 4. www.intervalsoftware.com  
EStampe by  Jean-Yves Quéinec.  Laboratory for Delphi graphics techniques and algorithms.  Excellent examples.  Be sure to compile with "range checking" off.

Estampe is specially designed to reduce image processing delays. It's two times faster to use than paintshop-pro for internet images because all the tools are visible. Blur and sharpen uses alternatively diagonal and orthogonal pixels to give better results.

Image mix : Edge blur uses a roundrect or ellipse mask drawn with a two-pixel pen. 

Also see Jean-Yves Quéinec's Estampe Demo program

Focus.  Photoretouch software by Francesco Savastano.
  • Create and manage digital photographic albums .
  • Acquire images from file and scanner .
  • Color and lighting filters, handle multiple layers .
  • Select parts of images by color and edges .
  • Painting tools : Airbrush, paint filler, dodge, burn , blur, sharpen by painting 
  • Textures
  • Multiple Undo and Redo.
  • Read and write to file in the most common graphic formats .
  • Batch processing : multi-images-multi-actions processing , easy and fast image cropping and resize .


G32 Software Graphic Libraries and Tools (by Alex Denisov)
IED: Image processing component suite. Load/save file formats,  process images, vetorial objects, measurements, handle TWain,  video capture, thumbnails, animated GIF/AVI/TIFF  create/edit/modify, etc.  http://delphi.icm.edu.pl/ftp/d30share/ied11d3.zip
Imag: Component suite for image processing and analysis. BMP, PCX, JPEG, animated GIF (LZW and NON-LZW no-Unisys licence!) and TIFF;   Twain scanners
ImagePro.  Image Manipulation Program.  

Imaging Toolkit for Delphi is a set of VCL components for image processing, scanning and storage.
The VCL components provides the following functionality: 

  • Enhanced components to display images.
  • Data-aware control to access images from databases.
  • Image file import and export classes supporting the most popular file formats and compressions.
  • Thumbnail viewer displaying images stored in different file formats.
  • Components to print images and present print previews.
  • Color format conversion: CIE, YCbCr, HSV, CMYK, etc.
  • Increase and decrease color resolution.
  • Histogram, Gamma, brightness/Contrast and threshold methods.
  • Filters to enhance images and remove noise, user defined filter kernel, etc.
  • Geometric transformations to scale, rotate, shear images, etc.
  • Transformed images are interpolated using a bilinear, bicubic, etc.
  • Mathematical & logical methods to blend images.
  • Morphology methods to Dilate, Erode, compute Outlines, Skeletons and more.
  • Scan images and documents from TWAIN scanners or digital cameras.
  • Add on OCR component.


ImgSource.  ImgSource is a Win32 DLL that can be used in any 32-bit environment capable of calling a Win32 DLL (VC++, VB, Access, SDK, etc). It provides over 160 image file and image processing functions. Most image processing functions are geared towards processing images as 24-bit RGB. Functions are provided for converting HBITMAP, DIB, 8-bit and grayscale to and from RGB 24-bit space.  www.smalleranimals.com/isource.htm 
ImageEn Component Suite for image processing and analysis. TIFF (RGB,CMYK,G3/G4 Fax,LZW), PNG, BMP, PCX, JPEG (RGB,CMYK,YCbCr, YCbCrK), animated GIF (LZW and Non-LZW - no-Unisys licence), ICO,    CUR, WMF, EMF file formats; FULL TWain scanners control  (without display scanner user interface), video capture (real  time image processing, YUV cameras supported), thumbnails grid,    create GIF/AVI animations, vectorial objects (lines, box, ellipses, text...) over bitmaps and more. Pure VCL code, no DLL required. Effects preview dialogs in six languages, advanced open/save dialogs. Store hidden text/binary inside images.  www.hicomponents.com 
(d4.0) http://delphi.icm.edu.pl/ftp/d40share/ie197d4.zip
(d5.0) http://delphi.icm.edu.pl/ftp/d50share/ie197d5.zip
(d6.0) http://delphi.icm.edu.pl/ftp/d60share/ie197d6.zip
PegasusImagxpress_small.jpg (4742 bytes) ImagXpress by Pegasus:   Comprehensive set of 70+ image-processing functions. Includes all of the functionality of ImagXpress Standard imaging. Also includes an expanded set of high performance document imaging features, deskew, despeckle, region of interest, and morewww.pegasustools.com/products/imagxpress4.htm
Intel Image Processing Library

Borland Delphi Example Application (near bottom of page).  Source code for an image editing application, written in Delphi, is provided. This application is similar to the Image Editing Demo.

Translation of header files for use in Delphi:

National Instruments provides a set of ActiveX components for image acquisition and manipulation.  When you install these components and import into Delphi, the ActiveX import will list something like "National Instruments CW IMAQ x.x (Version x.x)."   Component Palette Entries include:

- TCWIMAQ:  used for image acquisition from hardware

- TCWIMAQVision:  "vision engine" that contains all the smarts for vision work - math, histogram, convolutions, statistics, FFT, morphology, filters, mask, etc.

- TCWIMAQViewer:  The viewer is a sort of smart frame for displaying an image
in your application.


NIHImagelogo.GIF (19820 bytes) NIH ImageImage can acquire, display, edit, enhance, analyze and animate images. It reads and writes TIFF, PICT, PICS and MacPaint files, providing compatibility with many other applications, including programs for scanning, processing, editing, publishing and analyzing images. It supports many standard image processing functions, including contrast enhancement, density profiling, smoothing, sharpening, edge detection, median filtering, and spatial convolution with user defined kernels. Image can be used to measure area, mean, centroid, perimeter, etc. of user defined regions of interest.   http://rsb.info.nih.gov/nih-image

The complete Pascal source code for NIH Image V1.62. This source code is in the public domain.

SkyLine Tools Imaging Royalty Free Native VCLs for Delphi SkyLine Tools Imaging, Award Winning Corporate Suite is the most comprehensive Royalty Free toolkit in the Delphi and C++ Builder arenas. SkyLine's toolkits enable the integratration of document imaging, internet transfer, color, grayscale,video, audio, medical imaging and barcode recognition into Delphi applications.  http://delphi.icm.edu.pl/ftp/d30share/imglibd3.zip
TImageProcessor can manipulate images, including Arithmetic operations, Logical operations, Alphablending operations, Morphological operations, Geometric transforms amd Filters.
TGraphicsManager component.  Change colors, rotate, special effects
1-bit color g.gif (983 bytes)  efg's Single-Bit Bitmaps Lab Report

See pf1bit section of Scanline Tech Note

Alpha Blending TAgBlend - "Alpha blending" in Windows (A "faded" effect in your forms)

The function AlphaBlend performs an image composite operation by overlaying the foreground image with the background image to produce the resultant image.

TImageProcessor.  Logical Operations, Alpha blending, morphological operations, filters.  www.fortunecity.com/skyscraper/download/125/imgprs20.zip

Antialiasing Rough Around the Edges -- Antialiasing in Delphi by Rod Stephens, Delphi Informant, April 1998, pp. 60-64.
www.informant.com/delphi, File Downloads, Delphi 3, DI9804RS.ZIP or

SmoothLn. Antialiasing picture/image component.

Chris Hill's UseNet Post about Antialiased Fonts

Harman's UseNet Post showing Delphi code to rotate an image any angle, with edge wrapping, and anti-aliasing.

Resamples a 24-bit bitmap to half its original size by averaging the RGB values of 4 pixels into one pixel (anti-aliasing).  http://norfolkgraphics.com/download/antialias.zip 

Analysis and Processing - Regulation of contrast, HSL, HSV/ HSB and RGB components.
- Six filters for quality resampling (rfTriangle, rfHermite, rfBell, rfBSpline, rfLanczos3, rfMitchell).
- Application of 3x3 filters.
- Merge two images.
- Crop selected region.
- Preview of all the effects in a single dialog, with 8 preset filters (blur, edge detection, emboss, highpass1/ 2/ 3, lowpass1/ 2) and save and load filters from file.
- Conversion to gray scale and negative.
- Conversions of true color to black/white images with ordered or threshold dithering.
- Casting of a group of colors to a single color.
- Rotate any angle (optional antialiasing).
- Horizontal and vertical flip.
- Bump mapping effect
- Lens effect
- Copy, cut, paste and paste into a rectangle of all or part of the image.
- Undo last operation: automatic or manual.
- Application effects to the selected zones (also irregular)
- OnProgress event for monitoring image processing tasks.
- Histogram equalization (auto and manual) and threshold.
- Neural network color quantizer, for fast and accurate color reduction.
- Reduction to any number of colors (with colormap output).
- HSV channels separations.
- A property to select dialogs language (english, italian, german, spanish, french).
- A dialog to view a palette and select on it a color.
- VCL component for HSV/ HSB color selection.
- VCL component for displaying histogram of gray levels (or RGB channels).
- Connections with standard TImage component


Array Array of TImages:   efg's UseNet Post
Aspect Ratio Notes on maintaining aspect ratio of JPEG displayed in TImage.
Bitmap Resizing See Resampling
Bitmap Rotation efg's Lab Reports:
FlipReverse.gif (1023 bytes)  FlipReverseRotate (for rotations of multiples of 90 degrees, pf24bit bitmaps)

RotateCW.gif (933 bytes)   RotateScanLine (for general rotations of pf24bit bitmaps)

RotateCW.gif (933 bytes)   RotatePixels ("slow" rotation using Pixels property)

g.gif (983 bytes)  Single-Bit Bitmaps (for 90-degree, pf1bit rotations)

Jim Hargis' improved RotateBitmap that
- handles all the bitmap formats (auto-translates pf1bit, pf4 bit to pf8bit; all others are unchanged). 
- no corner clipping.
- background fill is transparent.
[Note:  delete EditINumber in Uses]
JimHargis_RotateBitmap.ZIP (updated 12 Nov 2000)

TRotateImage is a visual component derived from TGraphicControl. This component similar to TImage can display graphical images on a form. In addition, TRotateImage can rotate image across the center of the image in any arbitrary angle. 

For flood-filled arrow heads, or rotation of arrows or axes:  RotateAxes.ZIP
(See diagram above under Arrows.)

T.G.'s UseNet Post with RotateBitmap code to rotate a DIB

Detlef Brettschneider's E-mail with rotate_flip procedure

Thomas Kowalski's routines that operate very quickly:   SpiegellnHorizontal (Horizontal Mirror), SpiefelLnVertikal (Vertical Mirror), Drehen90Grad (90-degree rotation), Drehen180Grad (180-degree rotation) and Drehen270Grad (270-degree rotation) in his Unit7.    Look at his Drehen90Grad routine for a way to use Streams and the GetDIBits API call that would be an alternative to accessing pixel data in D1 and D2 without the use of Scanline introduced in D3.

Die Umsetzung für Delphi 2 funktioniert auch unter Delphi 3 und 4. Sie ist ein wenig schneller als deine Funktion. Ich benutze SaveToStream um an die DIB (Scanlines) zu kommen und bearbeite diese.  http://home.t-online.de/home/PeterJHaas/bitmap.htm#Wie_dreht_man_eine_Bitmap

Jack Sudarev's RotateBitmap procedure that performs antialiasing.

Harman's UseNet Post showing Delphi code to rotate an image any angle, with edge wrapping, and anti-aliasing.

Dave Shapiro's unit for rotating TBitmaps 90, 180, or 270 degrees. Works in D1, D2, D3, and D4. Not entirely optimized, but quick enough. It rotates a 1600x1200 image in 800 msec on his P2 400.

Picture Perfect -- Shrinking, Enlarging, and Rotating Images by Rod Stephens in Delphi Informant, Nov. 1998, Vol. 4, No. 11, pp. 16-25.   [Note: This article uses the very slow Pixels property. See efg's Lab Reports (links are below) for much quicker Scanline alternatives.]

Simple demonstration program with bitmap scaling & rotation.  (Delphi 3)

PlgBlt (parallelogram block transfer) can be used to rotate a bitmap but only in NT/2000.   See an example in Delphi Informant, Jan. 99, pp. 68-71.  Download code di9901rv.zip at www.informant.com/delphi/dfiles.asp
or read the article

Freddy Darsonville's E-Mail about a code starting point for rotation of a metafile

See [Jähne, pp. 283-285] for discussion of 2- and 3-pass rotation algorithm.

Blend Modes How do Adobe Photoshop, Micrografx PicturePublisher and Pegtop XFader blend layers?

Gaussian Blur

Jean-Yves Quéinec's Estampe Demo program

Change Brightness, Flip, Invert, Mirror, Gaussian Blur
Delphi Magazine Issue 45 Free Disk
(After unzipping, look in the System directory, TestBed project)

Brightness D6/D7 GraphUtil:
function ColorAdjustLuma(clrRGB: TColor; n: Integer; fScale: BOOL): TColor;

efg's example of how to Change Brightness of pf24bit Bitmap (D3-D5)

Jean-Yves Quéinec's Estampe Demo program

Luminosity (Luminosità) in Regulating Digital Images (in Italian)

Change Brightness, Flip, Invert, Mirror, Gaussian Blur Delphi Magazine Issue 45 Free Disk.  After unzipping, look in the System directory, TestBed project.

Comparison Example of comparing two TBitmaps and counting number of pixels that match and differ.

Example of comparing two TIcons.

efg's BMPJPG Lab Report compares BMPs from JPEGs of various qualities by computing correlation factor .  Also, see the BitmapCompare command line program included with this Lab Report.

See Comparing Files on efg's Delphi I/O:  Files page.

Contrast Enhancement HistoStretch.gif (959 bytes)  efg's HistoStretchGrays Lab Report

Jean-Yves Quéinec's Estampe Demo program

Michael Christopher's C++ Builder component  for simple image processing with 8 bit-images (invert and contrast enhancement).  MichaelChristopher_IP_Image.zip

Contrast (Contrasto) in Regulating Digital Images (in Italian)

Also see:  Text, Contrast

Cropping efg's Cropping Example by CopyRect or Scanline

Kerstin Thaler's UseNet Post about how to crop a bitmap using mouse events
Jacques Oberto's UseNet Post about "autocropping"
Joël Joly's UseNet Post about cropping an image

  • Floyd-Steinberg error diffusion dithering
  • Stucki Error Diffusion dithering
  • Sierra Error Diffusion dithering
  • Jarvis, Judice & Ninke Error Diffusion dithering
  • Stevenson & Arche Error Diffusion dithering
  • Burkes Error Diffusion dithering

TGIFImage by Anders Melander

Floyd-Steinberg dithering

Dragging Dragging an Image

Also see scrolling below

Drag & Drop

Encryption / Decryption CryptImage.jpg (948 bytes)   efg's ImageCrypt Lab Report

See Andreas Filsinger's original  summary of this encryption method and an updated version for Delphi 6.01.


Note from Lazikas o Pontios about convolution filters.

TImageProcessor.  Logical Operations, Alpha blending, morphological operations, filters. www.fortunecity.com/skyscraper/download/125/imgprs20.zip

HarmWave is a graphics application.  It is mostly designed to create tiles for use as web page backgrounds or windows wallpaper.  It has many effects and filters, but currently only supports BMP and JPG file types.  Can be used to edit/enhance photos.  It uses Delphi's TBitmap.Scanline property extensively. 

3-by-3 Convolution Filters

Filters, Median Filter Spyros' UseNet Post with Huang's Algorithm (Pascal code) of computing median

Optimal median smoothing, Applied Statistics, 44(2): 258-264, W. Haerdle, W. and M. Steiger, 1995.
ISO Pascal Code.  ftp://amadeus.wiwi.hu-berlin.de/pub/papers/sfb373/sfb1994/dpsfb940015.ps.Z 

Flip FlipReverse.gif (1023 bytes)  efg's FlipReverseRotate

Johnnie's UseNet Post with Flip procedure (uses stretchblt)

See "Flip" part of ShrinkFlipReverse.TXT example

Change Brightness, Flip, Invert, Mirror, Gaussian Blur
Delphi Magazine Issue 45 Free Disk
(After unzipping, look in the System directory, TestBed project)

Fourier Analysis, FFTs See Digital Signal Processing, Fourier Transforms, FFTs section of efg's Engineering Mathematics Page
Histograms Produce the histogram and percentage of dark to light pixels, of an eight bit gray scale Microsoft Windows bitmap (by Charles Hacker).  www.gu.edu.au/school/eng/mmt/ImProc.html 

Display/Print Histograms (R, G, B, H, S, V)
ShowImageHistograms.jpg (4803 bytes)  efg's
Show Image

HistoStretch.gif (959 bytes)  efg's HistoStretchGrays Lab Report

The fourth order central moment (kurtosis) is a measure of peakedness of a histogram.

Image Enhancemennt Collage is a quick and easy to use image/movie viewer which  includes a number of useful image processing and editing  features. It is an MDI (Multiple Document Interface) application  which means you can process several images in one workspace.   Enhance images using the Autobalance, Sharpen, Smooth functions   as well as a choice of 9 Zooming algorithms. Other features  include cropping, resize, rotate, slideshow, fit-to-screen, text  and border insertion.One of its strongest features is a powerful collage creation capability.this allows a number of images (or  portions of images) to be pasted on to a single canvas and saved  as a single image. Collage also has the ability to playback  movies and to extract images from movies.   http://delphi.icm.edu.pl/ftp/d30share/collg201.zip
Image from Data See how to create a shades-of-gray image from a matrix of 8-bit data values.
(This example creates a pf24bit bitmap from 8-bit data.  To create a pf8bit bitmap
with a palette, look at the pf8bit section of the Scanline Tech Note.)
Image Marquee See "Marquee, Image"
"Magic Wand" Magic wand tool found in many photoretouch software packages
Noise Image CryptImage.jpg (948 bytes)   efg's ImageCrypt Lab Report
OCR Optical Character Recognition

Program OCR is used for recognition of Cyrillic letters using backpropagation neural networks.


"Displaying your bitmaps quickly", Delphi Developer's Journal, July 1998, pp. 12-15. (Double buffering using Pixels instead of Scanline. This technique is not very quick compared to using Scanline!) File 98JUL/DDJ9873.ZIP at ftp.zdjournals.com/ddj.

efg's Scanline Tech Note

For some general optimization tips, see Optimization on efg's Delphi Miscellany page

Pan Descendant of TPanel that can display an image, pan, zoom, and paint on it. You can define a coordinate system at any time, and it will remain true through all the panning and zooming you want.
Pixel Profile PixelProfile.gif (1269 bytes)  efg's Pixel Profile Lab Report
Printing an Image See Item 1, "How can I print a bitmap?" on efg's Delphi Printing page

Sending an image to the printer (FAQ 1211D)

efg's Printer Demo #1

Rectangle-to-Trapezoid mapping
Resampling Also see StretchDraw and  Zoom

See TCanvas.StretchDraw example on Delphi Graphics VCL/RTL page

Example of image resampling using Scanline (D3-D5)

See "Shrink" part of ShrinkFlipReverse.TXT example

Note from Lazikas o Pontios abut Resampling to zoom.

Interpolating Bitmap Resampler by Anders Melander, Delphi 2/3
The Interpolating Bitmap Resampler is a routine used to resize an image smoothly without loss of image fidelity.  The algorithms and methods used in this library are based on the article "General Filtered Image Rescaling" by Dale Schumacher that appeared in the book Graphics Gems III.   The following resampling filters are currently implemented in this library:  Nearest neighbor (Box), Bilinear (Triangle), Hermite, Bell, B-Spline, Lanczos3, Mitchell

Simple demonstration program with bitmap scaling & rotation.  (Delphi 3)

Make a thumb nail

Picture Perfect -- Shrinking, Enlarging, and Rotating Images by Rod Stephens in Delphi Informant, Nov. 1998, Vol. 4, No. 11, pp. 16-25.   [Note: This article uses the very slow Pixels property. See efg's Scanline Tech Note for a much quicker Scanline alternative.]

Reverse FlipReverse.gif (1023 bytes)  efg's FlipReverseRotate

See "Reverse" part of ShrinkFlipReverse.TXT example

Change Brightness, Flip, Invert, Mirror, Gaussian Blur
Delphi Magazine Issue 45 Free Disk
(After unzipping, look in the System directory, TestBed project)

Rotation See "Bitmap, Rotation" above
Satellite Tools www.davidtaylor.freeserve.co.uk/software/wxsat.htm
Scanline efg's Tech Note:  Manipulating Pixels with Delphi's Scanline Property
Scanners Delphi Program for Radio Shack Cuecat Scanner

See also TWAIN

Satellite Images GRIP (Geographic Raster Image Processor) processes PNG format images.  Import Landsat, Slar, SAR, and AVHRR imagery into the PNG format.  www.winsite.com/info/des_package_1500000034993.html 
Scrolling ScrollBars with TImage
See \Program Files\Borland\Delphi n\HELP\Examples\Scrollba\ScrolDem.PAS

Example of how to scroll 1024-by-768 BMP in a 128-by-128 TImage using scroll bars, or by dragging with the mouse.

"Scrolling an Image," pp. 24-25, Chapter 22 (online "bonus" chapter) of  Mastering Delphi 5 by Marco Cantù.

TScrollingImage Component is a visual component for use with Borland's Delphi. It display a scrollable (in 4 directions) image.  www.programmersheaven.com/zone2/cat502/5836.htm 

Wayne Herbert's Sample Project (D3 or higher) showing how to scroll a TImage including "The Basics of Scoll Bar Implementation" (in file kmscrollbaru.pas)

Sharpen Jean-Yves Quéinec's Estampe Demo program
Spiral Transform See example on Delphi Graphics Algorithms:  Math/Geometry page
Texture Mapping Delphi Graphics Programming by Peter Dove and Don Peer in Delphi Informant:
Part III, Mar 97: "Texture Mapping" (pp. 74-82).


Anders Isaksson UseNet Post with Example

Bump mapping

Thumb nails See "Resampling"

How to create thumbnails of JPEG images programmatically

Super Thumbnails

TWAIN (Technology Without An Interesting Name)

EZTwain Pro 3 - 32-bit DLL with Delphi interface, offers comprehensive
control of TWAIN scanners and cameras, including output to BMP, JPEG, PNG,
GIF, TIFF and PDF.  Many conveniences, for example one function that scans a
multipage document into a TIFF or PDF file.  Commercial shareware version of
the well-regarded free EZTwain Classic:  www.dosadi.com/eztwain3.htm
Feedback & suggestions welcome from Delphi developers.

Handle the acquisition from scanners (devices) that are TWAIN compliant.  Selecting the desired scanner and acquiring an image is as easy as thinking of it.  Tested with HP, Epson, Logitech, Mustek, Fujitsu and several other scanners over a wide range of computers.

TImagePlus/TDbImagePlusTImageTwain/TDbImageTwain.  These components make use of  Twain Scanners & Cameras simple built-in popup menu with Cut / Copy / Paste / Open / Save As / Stretch / Center / Aspect / Select Source / Acquire image and more.

ProjectJediButton.gif (3350 bytes)  TWAIN Scanner and Imaging Interface.  Project JEDI Conversion Library by Uli Tessel, Matthias Thoma. http://www.delphi-jedi.org/Jedi:APILIBRARY 

The TWAIN Working Group is a not-for-profit organization which represents the imaging industry. TWAIN’s purpose is to provide and foster a universal public standard which links applications and image acquisition devices. The ongoing mission of this organization is to continue to enhance the standard to accommodate future technologies.  www.twain.org

Tween Tween.gif (981 bytes)  efg's Tween: Create sequence of images to fade from one image to another. See also Fade.
Video See Video on efg's Delphi Multimedia page

Delphi example of DirectX Video with EPIX PIXCI Card

Viewer Borland example: ..\Delphi n\Demos\ImagView\Imagview.dpr

"Bitmap Viewer -- MDI Child Form," Delphi 5 Developer's Guide by Teixeira and Pacheco in Online "CD" Chapters, pp. 262-271

Viewer:  Simple image viewer with high quality display of images even on 256-, 32K and 64K-colour adapters. Displays TGA, JPEG, GIF, WMF and BMP files. 

Slide Show:  Program to make a slide show from a list of JPEG images.

ViewerRGB.gif (1080 bytes) efg's ShowImage Lab Report
SlideShow.gif (1054 bytes) efg's Slide Show Tech Note
Watermarks RadomAccess' UseNet Post about watermarks
Wavelets Non-Delphi:
See Wavelets Section of efg's Mathematics Page
Web Applications Tutorials from the Delphi Apostle:
Showing Images in a Browser from a Database
Reducing Image Size On-the-Fly (thumbnails)
Windows Shutdown Effect Steve Schafer's UseNet Post about how to apply the Windows Shutdown Screen Effect to a Bitmap using CopyMode
Zoom Also see Resampling

Serge Gubenko's ZoomOutSources that captures and enlarges an area of the Windows desktop. Works similar to ZoomIn utility from Visual Studio, but has more functionality, such as drawing grid lines.




Descendant of TPanel that can display an image, pan, zoom, and paint on it. You can define a coordinate system at any time, and it will remain true through all the panning and zooming you want.


VCL component for displaying images. Easy-to-use scrolling and zooming.


Magnify.gif (969 bytes)   efg's Digital Magnifying Glass Lab Report

Dr. Chris Rorden's Kylix magnifier example

Links Verified 6 Feb 2000
Updated 26 Feb 2005

since 6 Feb 2000