We have been asked to look for examples of image types, basic and advanced file types. It's a bit difficult in looking for these files because only truecolor or RGB are seen in the web. I just convert everything to have examples of each type. Below are the examples:
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| Fig. 1. Example of a Binary Image |
- Filename: 'C:\Users\MP\Documents\Dropbox\Files\186\A3 - binary.jpg'
- FileModDate: '23-Jun-2011 10:18:24'
- FileSize: 15517
- Format: 'jpg'
- FormatVersion: ''
- Width: 400
- Height: 333
- BitDepth: 8
- ColorType: 'grayscale'
- FormatSignature: ''
- NumberOfSamples: 1
- CodingMethod: 'Huffman'
- CodingProcess: 'Sequential'
- Comment: {}
- ---------------------------------------------------------------------------------------------------------------
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| Fig. 2. Example of a Grayscale image |
To the right is an example of a GRAYSCALE image. Below is its file info:
- FileModDate: '23-Jun-2011 10:21:47'
- FileSize: 66496
- Format: 'jpg'
- FormatVersion: ''
- Width: 400
- Height: 329
- BitDepth: 8
- ColorType: 'grayscale'
- FormatSignature: ''
- NumberOfSamples: 1
- CodingMethod: 'Huffman'
- CodingProcess: 'Sequential'
- Comment: {}
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| Fig. 3. Example of a True Color image |
The image to the right is an example of a TRUE COLOR image. Below is the info of this image.
- Filename: 'C:\Users\MP\Documents\Dropbox\Files\186\A3 - truecolor.png'
- FileModDate: '21-Jun-2011 11:53:18'
- FileSize: 86245
- Format: 'jpg'
- FormatVersion: ''
- Width: 300
- Height: 300
- BitDepth: 24
- ColorType: 'truecolor'
- FormatSignature: ''
- NumberOfSamples: 3
- CodingMethod: 'Huffman'
- CodingProcess: 'Sequential'
- Comment: {[1x58 char]}
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| Fig. 4. Example of an indexed image |
- Filename: 'C:\Users\MP\Documents\Dropbox\Files\186\A3 - indexed.jpg'
- FileModDate: '23-Jun-2011 10:39:41
- FileSize: 27774
- Format: 'jpg'
- FormatVersion: ''
- Width: 400
- Height: 300
- BitDepth: 24
- ColorType: 'truecolor'
- FormatSignature: ''
- NumberOfSamples: 3
- CodingMethod: 'Huffman'
- CodingProcess: 'Sequential'
- Comment: {}
 |
| Fig. 5. Example of HDR image |
- Filename: 'C:\Users\MP\Documents\Dropbox\Files\186\A3 - HDR.jpg'
- FileModDate: '23-Jun-2011 11:31:41
- FileSize: 53871
- Format: 'jpg'
- FormatVersion: ''
- Width: 450
- Height: 301
- BitDepth: 24
- ColorType: 'truecolor'
- FormatSignature: ''
- NumberOfSamples: 3
- CodingMethod: 'Huffman'
- CodingProcess: 'Progressive'
- Comment: {}
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| Fig. 6. Example of a Hyperspectral Image |
- Filename: 'C:\Users\MP\Documents\Dropbox\Files\186\A3 - Hyperspectral.jpg'
- FileModDate: '23-Jun-2011 11:32:43'
- FileSize: 28509
- Format: 'jpg'
- FormatVersion: ''
- Width: 370
- Height: 329
- BitDepth: 24
- ColorType: 'truecolor'
- FormatSignature: ''
- NumberOfSamples: 3
- CodingMethod: 'Huffman'
- CodingProcess: 'Sequential'
- Comment: {}
 |
| Fig. 7. Example of a 3D image |
- Filename: 'C:\Users\MP\Documents\Dropbox\Files\186\A3 - 3D.jpg'
- FileModDate: '23-Jun-2011 11:36:47'
- FileSize: 2187543
- Format: 'jpg'
- FormatVersion: ''
- Width: 1653
- Height: 1050
- BitDepth: 24
- ColorType: 'truecolor'
- FormatSignature: ''
- NumberOfSamples: 3
- CodingMethod: 'Huffman'
- CodingProcess: 'Sequential'
- Comment: {}
- Orientation: 1
- XResolution: 72
- YResolution: 72
- ResolutionUnit: 'Inch'
- Software: 'Adobe Photoshop CS2 Windows '
- DateTime: '2006:01:17 12:15:10 '
- DigitalCamera: [1x1 struct]
Here is an example of a video file. Below is its file info:
- Filename: 'C:\Users\MP\Documents\Dropbox\Files\186\A3 - clock.avi'
- FileModDate: 'Saturday, June 18, 2011, 11:15:27 AM'
- FileSize: '82944'
- Format: 'avi'
- Video
- Length: 00:00:12
- Frame width: 321
- Frame height: 321
- Data rate: 48 kbps
- Total bit rate: 56 kbps
- Frame rate: 1 frame/second
- Audio
- Bit rate: 8 kbps
- Channel: 1(mono)
- Audio sample rate: 8 kHz
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| Fig. 8. Size of the scanned image |
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| Fig. 9. Histogram of the grayscaled scanned image |
The image above is the histogram of my scanned image from Activity 1. As I observed it, the minimum threshold for this image is around 0.3. I, then converted the grayscale image into black and white and used the threshold I have observe. Below is the image of the black and white image using the threshold.
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| Fig. 10. Black and white Image using threshold = 0.3 |
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Image File Formats
- JPEG/JPG
- JPEG is an acronym for Joint Photographic Experts Group which created the standard with the approval of ISO in 1992, 1994, 1996, 1998 and underdevelopment since 2009. Its typical usage is in photographs and realistic scenery. This type uses lossy compression but it has an option of lossless compression.
source: http://en.wikipedia.org/wiki/JPEG
- BMP
- BMP stands for Bitmap Image File or simply Bitmap is a Raster graphics image file format that stores bitmap image files independent from the storing device. My source quote one paragraph from Microsoft support:
"A device-independent bitmap (DIB) is a format used to define device-independent bitmaps in various color resolutions. The main purpose of DIBs is to allow bitmaps to be moved from one device to another (hence, the device-independent part of the name). A DIB is an external format, in contrast to a device-dependent bitmap, which appears in the system as a bitmap object (created by an application...). A DIB is normally transported in metafiles (usually using the StretchDIBits() function), BMP files, and the Clipboard (CF_DIB data format)."
for more info: http://en.wikipedia.org/wiki/BMP_file_format
- PNG
- PNG means Portable Network Graphics which is also a bitmap image format and video codec that utilizes lossless compression. This supports palette - based images, grayscale images and RGB images. It starts with an 8 - byte signature header followed by a "chunk" of files. After these files, there goes the color depth and transparency of image. After these, there is compression and filtering of the image. This offers an interlacing algorithm called Adam7 algorithm. PNG does not support animation but its file extension, MNG does.
source: http://en.wikipedia.org/wiki/Portable_Network_Graphics
- TIF/TIFF
- This is the last type that I will discuss. TIFF stands for Tagged Image File Format which stores image and mainly popular to professional photographers. They say that this file type is a flexible, adaptable file type. This file type does not have any provision in compression and no restrictions. It was defined by ISO in 1993.
---------------------------------------------------------------------------------------------------------------source:http://en.wikipedia.org/wiki/TIF
Oh I forgot something. I will rate myself with 11 overall. Both Technical and Presentation Qualities are 5 each and 1 for the initiative because I have used SIVP in showing the other images and have incorporated my previous activity blog as a comparison to one of the figures above. :)
Edited at 11:18 AM, 28 June 2011.
I have found the command for histplot in Scilab 5.3.2. Here is the link. http://app186.blogspot.com/2011/06/histplot-in-scilab-532-using-sivp.html
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