Image File Format

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Image File Format
HEADER
IFD
DATA

• How to read data ?

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• Need
• Image Width
• Image Length
• Strip Offset
• Read the data

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• After get the data, can do any thing
• Convert to raw
• ASCII image
• Image processing

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Intro to Vicwin

• Overview
• What is vicwin?
• Image processing library by Catenary Sys. Inc.
• Support
• JPEG, BMP, TIFF, GIF, PCX
• 1, 8, 24 bit
• function
• File handling, memory management, image
  processing, scanner etc

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• Data Structure
• Device Independent Image (DIB)
• Image Descriptor (ImgDes)
• How to retrieve information
• Image width, image height, image size, etc

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• In using vicwin, you are only allow to use for
  loading image.
• You can not use built in function for image
  manipulation.

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• How Victor Image Differ from Windows DIBs
• Windows DIBs may be compressed or uncompressed,
  Vicwin can operate only on an uncompressed DIBs
• Windows allows DIBs to have 1, 4, 8, or 24 bits
  per pixel, Vicwin can used on 1, 8, 24 bits per
  pixel.

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• Image Descriptor Format
• Most import data structure
• Contains all information necessary for vicwin to
  operate
• ImgDes-Describe the image

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• typedeft struct
• unsigned char huge ibuff
• unsigned stx, sty, endx, endy
• unsigned buffwidth
• RGBQUAD far pallete
• int colors, imgtype
• BITMAPINFOHEADER far bmh
• HBITMAP hBitmap

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• Download the Vicwin from
• http//gmm.fsksm.utm.my/image

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Using Victor Windows Library

• Scope Using Delphi
• Call vicwin DLL using Delphi
• Create one file anyname.pas
• These file contains
• DLL calling
• Error codes, constant value
• Data structure
• Function and procedure

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How to load vicwin?

• There are a few step
• Install new component
• Or add vicwin.pas in each file that use it with
  USES vicwin

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Delphi
Your application
Function prototype vicwin.pas interface layer
Vic32.dll
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Basic architecture
File
Vicwin Image - ImgDes
Scanner
Clipboard
View image
Processing
Loading image