Presentation is loading. Please wait.

Presentation is loading. Please wait.

A bug in PhotoPlus When PhotoPlus X2, version 12.0.2.11, is used to create a new.bmp file, it does not create the Pixel Data correctly This bug may have.

Published by Modified over 9 years ago

Similar presentations

Presentation on theme: "A bug in PhotoPlus When PhotoPlus X2, version 12.0.2.11, is used to create a new.bmp file, it does not create the Pixel Data correctly This bug may have."— Presentation transcript:

1 A bug in PhotoPlus When PhotoPlus X2, version 12.0.2.11, is used to create a new.bmp file, it does not create the Pixel Data correctly This bug may have been removed in later versions of the package but we will consider it in some detail here, because it illustrates how frequently software packages have bugs or "features" which deviate from the standards they are supposed to follow

2 Creating a new.bmp file in PhotoPlus We are starting a new 4-by-4 image

3 Creating a new.bmp file in PhotoPlus We have just painted the pixels

4 Creating a new.bmp file in PhotoPlus We are just about to export the image to test4By4.bmp

5 Viewing the new.bmp file in PhotoPlus We are about to open the image we just created in test4By4.bmp

6 Viewing the new.bmp file in PhotoPlus The image in test4By4.bmp appears wrong when we open it Let's try to view it in other programs

7 Viewing the new.bmp file in MS Paint The test4By4.bmp image also appears wrong in MS Paint

8 Viewing the new.bmp file in Opera The test4By4.bmp image also appears wrong in Opera

9 Viewing the new.bmp file in Firefox The test4By4.bmp image also appears wrong in Firefox

10 Viewing the new.bmp file in XVI32 It is easy to see that the image in test4By4.bmp is not what we stored All the Pixel Data bytes are 00 So they are pointing to the same entry in the Colour Table

11 Creating an (almost) correct.bmp file in PhotoPlus We cannot export a new correct.bmp file from PhotoPlus, but... When Photoplus imports a correct.bmp file (one created by another editor, including XVI32), it seems not to introduce errors when we subsequently export it Also, when Photplus imports an almost correct.jpg file, it creates a correct.bmp file when we export the image as a.bmp

12 Creating, indirectly, an (almost) correct.bmp file in PhotoPlus We have just painted the pixels for a new image We are about to export the image as.jpg file

13 Creating, indirectly, an (almost) correct.bmp file in PhotoPlus We have just opened the.jpg file containing the image we exported The image looks correct We are about to export the newly opened image as.bmp file

14 Examining the (almost) correct.bmp file in PhotoPlus We have just opened the newly exported.bmp file It looks correct, but is it? On the next slide, we will examine the.bmp file in XVI32

15 Examining the (almost) correct.bmp file in XVI32 The Pixel Data look correct There are four sequences of four bytes 00 00 00 00 01 01 01 01 00 00 00 00 01 01 01 01 On the next slide, we will look at the Colour Table

16 Examining the (almost) correct.bmp file in XVI32 The Colour Table is not quite right The Green is correct: 00 FF 00 00 But the Red is slightly off: 00 00 FE 00 This is a result of the sampling done when the.jpg file was exported As we will see on the next slide, there is something else...

17 Examining the (almost) correct.bmp file in XVI32 There is also a problem in the Info Header The ColorsUsed and ColorsImportant fields are set to all zeros This is wrong –ColoursUsed should 00 01 00 00 –ColorsImportant should be 02 00 00 00 The fact that the.bmp file displays correctly in PhotoPlus, MS Paint and the various browsers just shows that these programs do not pay much attention to these two fields in the Info Header

18 Correcting the (almost) correct.bmp file in XVI32 We can correct the.bmp file by setting the bytes highlighted below to the values shown Below, we have just saved the edited image in a file called test4By4newCorrected.bmp On the next few slides, we will view this file in various programs

19 Viewing the corrected.bmp file in PhotoPlus Below, we have just opened the image in test4By4newCorrected.bmp in PhotoPlus It looks fine

20 Viewing the corrected.bmp file in MS Paint Below, we have just opened the image in test4By4newCorrected.bmp in MS Paint It looks fine

21 Viewing the corrected.bmp file in Opera Below, we have just opened the image in test4By4newCorrected.bmp in Opera It looks fine

22 Viewing the corrected.bmp file in Firefox Below, we have just opened the image in test4By4newCorrected.bmp in Firefox It looks fine

Download ppt "A bug in PhotoPlus When PhotoPlus X2, version 12.0.2.11, is used to create a new.bmp file, it does not create the Pixel Data correctly This bug may have."

Similar presentations

HTML I. HTML Hypertext mark-up language. Uses tags to identify elements of a page so that a browser such as Internet explorer can render the page on a.

HTML I. HTML Hypertext mark-up language. Uses tags to identify elements of a page so that a browser such as Internet explorer can render the page on a.
How to Use the Water Quality Results Viewer Application Kentucky Division of Mine Permits Watershed Characterization Data.

How to Use the Water Quality Results Viewer Application Kentucky Division of Mine Permits Watershed Characterization Data.
Getting started with MPLAB Launch MPLAB Set Toolbar as in the next slide by clicking the leftmost icon Open a new Source file by choosing [FILE][NEW] Type.

Getting started with MPLAB Launch MPLAB Set Toolbar as in the next slide by clicking the leftmost icon Open a new Source file by choosing [FILE][NEW] Type.
Web Shift Booking System

Web Shift Booking System
KompoZer. This is what KompoZer will look like with a blank document open. As you can see, there are a lot of icons for beginning users. But don't be.

KompoZer. This is what KompoZer will look like with a blank document open. As you can see, there are a lot of icons for beginning users. But don't be.
XHTML Basics.

XHTML Basics.
Coding and Debugging. Requirements and Specification Recall the four steps of problem solving: Orient, Plan, Execute, Test Before you start the implementation.

Coding and Debugging. Requirements and Specification Recall the four steps of problem solving: Orient, Plan, Execute, Test Before you start the implementation.
SuperStar Basics Brian Bruderer. Sequence Editors Traditional sequence editors use a large grid to control when channels are turned on and off. This approach.

SuperStar Basics Brian Bruderer. Sequence Editors Traditional sequence editors use a large grid to control when channels are turned on and off. This approach.
Chapter 7: Introduction to Debugging TECH1010-02 Prof. Jeff Cheng.

Chapter 7: Introduction to Debugging TECH Prof. Jeff Cheng.
TRACK 2™ Version 5 The ultimate process management software.

TRACK 2™ Version 5 The ultimate process management software.
Using Data Dump to Export Data from StarPanel Purpose: Means of exporting data as Excel spreadsheet for manipulation outside StarPanel. Generally start.

Using Data Dump to Export Data from StarPanel Purpose: Means of exporting data as Excel spreadsheet for manipulation outside StarPanel. Generally start.
Right-click on the colored box and remove it.

Right-click on the colored box and remove it.
Fall 2007ACS-1903 BlueJ Ron McFadyen Lab 1: Using BlueJ at UofW The purpose of this lab is to give you some experience with BlueJ. Over the course of the.

Fall 2007ACS-1903 BlueJ Ron McFadyen Lab 1: Using BlueJ at UofW The purpose of this lab is to give you some experience with BlueJ. Over the course of the.
Using a hex editor to edit an image We can actually use hex editors to change image files Usually, we will use programs like PhotoPlus or PhotoShop But.

Using a hex editor to edit an image We can actually use hex editors to change image files Usually, we will use programs like PhotoPlus or PhotoShop But.
A 24-bit depth.bmp file made in XVI32 This 2-by-2 image was handcrafted in XVI32 Bytes 1C-1D hex in the Info Header say that the image uses 24-bit (18.

A 24-bit depth.bmp file made in XVI32 This 2-by-2 image was handcrafted in XVI32 Bytes 1C-1D hex in the Info Header say that the image uses 24-bit (18.
How pictures are stored in computers. While it is useful to know how to use picture editing software, Computer Scientists should understand how pictures.

How pictures are stored in computers. While it is useful to know how to use picture editing software, Computer Scientists should understand how pictures.
Regression testing Tor Stållhane. What is regression testing – 1 Regression testing is testing done to check that a system update does not re- introduce.

Regression testing Tor Stållhane. What is regression testing – 1 Regression testing is testing done to check that a system update does not re- introduce.
Getting an account with WordPress.com Open your web browser ( mozilla firefox, internet explorer, opera, etc.,)

Getting an account with WordPress.com Open your web browser ( mozilla firefox, internet explorer, opera, etc.,)
Creating FrontPage Tasks The task view allows you to add information about what you want to accomplish when creating your Web site.

Creating FrontPage Tasks The task view allows you to add information about what you want to accomplish when creating your Web site.
EASY TEAM MANAGER By Dave Abineri EASYWARE: PO Box 231, Milford, OHIO 45150 (Cincinnati) Phone: (513) 248-0590 Use UP arrow to move to the NEXT slide Use.

EASY TEAM MANAGER By Dave Abineri EASYWARE: PO Box 231, Milford, OHIO (Cincinnati) Phone: (513) Use UP arrow to move to the NEXT slide Use.

Similar presentations

Ads by Google