Calculate The Predominant Or Average Colour In An Image File?
Jun 16, 2010
i am trying to code a program in vb.net that will calculate the predominant or average colour in an image file and then change the fillcolor of a rectangle to that predominant colour. I want to do that by getting the RGB value of each pixel, adding them up and then dividing them by the total number of pixels in the picture. This is the code that I wrote to do that.
[Code]...
I am a beginner programmer so this is basically the second time I fired up VS (not much experience). I searched the internet for the last hour but found nothing that might help me. I made sure every value is positive and changed all numerical variables from integer to decimal and I still get the error.I have absolutely no idea why this doesnt work but if I remove the "for" loop then the line written in bold works just fine.BTW this is my first post so scuze any mystakes I probably made.
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Mar 25, 2009
I'm trying to calculate an average no from data imported from a text file using streamreader. I'm not sure how the loop should read, and the result (average) I want to hold in a separate variable for future use.[code]...
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Oct 11, 2009
Heres my [code]...
For example if I enter in 45, 45 and 89; I should get 55.75. But instead all I get is 55. How do I get the percentage?
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Jul 21, 2009
I have text1=a, text2=b, text3=c, text4=d, text5=e
Now I want to calculate the average of the values,
Here's a simple way
average=(a+b+c+d+e)/5
But what if i have values only in 3 textboxes, that means the code will still divide the sum of the values into 5, that will not be correct!
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Jun 7, 2012
My objective: to check the remaining btns in play and obtain the cash prizes in the remaining btns then calculate the average. It may seem simple but it actually isn't.
Here is what i have so far:
Private Sub btncase1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btncase1.Click
If usercase = 0 Then
usercase = btncase1.Text
[CODE]...
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Oct 10, 2011
I have a spreadsheet that has two columns (A and B) - Column A contains Month/Year and column B contains sales. I would like a bit of vba that will look in column A to find the month/year then calculate from column B the average sales for that period. So for example:
Date Sales
Jan 11 500.00
Jan 11 250.00
Mar 11 152.00
Apr 11 116.00
So in other words there can be a number of lines with the same date/year and the code will need to identify these and average all sales from column B associated with that particular date. I would like the output to appear in a summary table showing the total average sales for each particular month - perhaps this could be output to a new sheet?
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May 19, 2011
I'm in a bit of a pickle. I'm new to Visual Basic and I have been writing a simple program to rate movies. I'm stuck on calculating the average from the text file. The text file holds the numbers from 1 - 10 (ratings). I want my program button to add all the values from the text file and display the average from the total amount of ratings and display them into a text box.
[Code]...
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Jun 22, 2010
Write a program to calculate the average of three exam marks. The input and output should be done by subprograms GetMarks and DisplayAverage respectively. the calculation should be done by a function, CalcAverage. This is my code:
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
Dim student As String, exam1 As Integer, exam2 As Integer, exam3 As Integer
Dim average As Double
lstResult.Items.Clear()
[code]....
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Apr 28, 2011
I'm trying to write a program that allows the user to enter 10 numbers into an input box and then the program will use a function to calculate the average of those numbers. I'm really illiterate when it comes to Visual Basic.
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Feb 11, 2009
I'm looking for a way to calculate an average from a input integer within a loop. When the user enters something like -90, the average will be calculated using the previously input numbers.
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Jun 8, 2011
I want to calculate the average value of excel table readings 1 hr once... how do i import the sheet and how do i calculate the avg in vb.net?
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Oct 20, 2009
This is the current incarnation of what I have:
'Program: Ch4E4.6
'Programmer: Jeff Pannell
'Date: October 1, 2009
'Description: This will allow for entry of a worker's name and the number of pieces completed. The program will then calculate a pay rate, but also determine an average and summarize number of pieces made, total pay and an average pay per person.
Public Class PieceworkForm
'Declaration of modular-level constants.
Const PIECE_RATEA_Decimal As Decimal = 0.5D
Const PIECE_RATEB_Decimal As Decimal = 0.55D
Const PIECE_RATEC_Decimal As Decimal = 0.6D
[Code] .....
So, my problem is that whenever the form is executed..a user would type in a worker name, and the amount of pieces made. I get a dollar amount earned and then a total pay, though they seem to be the same. More than likely I've got some sort of bad logic in there mathematically.
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Feb 14, 2010
For my programm I was told to do a programm to calculate the total and average rainfall. I have done so, but now I am supposed to use two function procedures to calculate the total and average rainfall. I can not seem to figure it out and it is very frustrating.
[Code]...
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Apr 4, 2012
Write a program that reads in a set of grades for a class.The program takes in the number of students in the class from the user. When the Get Grades button is clicked the program then reads in a grade (0-100) for each student using an inputbox. The program should then display the percentage of students who pass and the percentage of students who fail.The program should call a function to calculate the average grade for the class. Then finally the result is then displayed.
Public Function GetPassRate(ByVal intGrade As Integer) As String
Do Until gradeCounter >= NumericUpDown1.Text
If intGrade >= 40 Then[code].......
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Mar 25, 2009
I'm trying to calculate the average hours worked from a set of data imported from a text file using streamreader. My problem is counting the number of entries and the total hours worked imported from a text file within a loop[.
[Code]...
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Aug 18, 2011
I'm working with an API, for this I'm using this particular call: [URL]
If i use this, I will get all the .price values:
For i = 0 To .bets.Length - 1
With .bets(i)
Print(.price)
End With
Next
Can I calc the average .price value? I will need to sum all the values as well.
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Mar 15, 2010
Im trying to programme a form to calculate rainfall total,average,maximum, and minimum.how do I create the input box that opens to input the info I cant seem to find it in the tool box. Am i Missing something, and how do I set a array to calculate?
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Jul 20, 2010
Ok so i have a form of witch the user is able to change the background image of. The form has labels on it. How can i make the fore colour change to be if possible the opposite colour to the image where the label is in order to make it readable?
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Feb 12, 2011
I am overlaying a staff members ID number over their photo using drawstring.
As the image can vary from dark to light no one text colour can assure that the text will be readable.
Is there an easy way to invert the text colour pixel by pixel based on the colour of the image pixel the text will be drawn onto.
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Dec 7, 2010
I am making an application which is capable of displaying a picture, and making adjustments to it. Unfortunately i'm stuck at this phase:The colour of each pixel in the image should be inspected and stored in one or more arrays.
My code so far
Public Class Form1
Dim OpenFileDalog1 As New OpenFileDialog
[code]....
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May 7, 2010
Is there any way to change the colour (background colour or text colour) of just a certain item or item(s)?
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Jun 15, 2010
I want to include an average in a column where the average ignores zero values in a report cell where the column may have
17
19
0
[code].....
I want 16, not 11 so (17 + 19 + 12 + 13 + 19) / 5 not (17 + 19 + 0 + 0 + 12 + 13 + 19) / 7 Something like this if it would work.
=SUM(Fields!fieldname.Value) / Count(iif(Fields!count_cycle_per_hour.Value >= 0,Fields!fieldname.Value,0))
Essentially just average everything in the column NOT a zero?
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Jan 26, 2011
I am using the following code to place a rectangle around a form / form control, however what I want to do is make my screen grey and only the form / form control area be displayed in colour.
Code:
I have googled for ages trying to find something on this, but with no luck.
To illistrate this better they are using the same functionality in snagit 10, please see below link to a page that has a video link showing this (23 sec into video)[url]
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Mar 15, 2012
To .NET after getting tired of using VB6 due to the lack of functionality. I'm trying to create a log on method for a system which will involve users selecting a colour from a paint panel and then placing/drawing the colour in 1 or more tiles of a grid, basically a 3x3 grid in which for example they selected the blue colour and drew in the top left tile and the bottom left tile. The logon is selecting the correct colour and placing the colour in the appropriate tile. What i want them to be able to do is place even a single pixel of colour so it has a high accuracy. So far i have a timer which loops from the width of the grid to the height of the grid.
Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
Dim BMP As New Drawing.Bitmap(1, 1)
Dim GFX As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(BMP)
GFX.CopyFromScreen(New Drawing.Point(MousePosition.X, MousePosition.Y), _
[CODE]...
To start with i have just hard coded the colour i want it to detect. At present it produces an error. Parameter must be positive and < Width the error is on System.Drawing.Point(i,j). If i place the mouse over the colour then run the program it will say it has been found, but otherwise it wont find the colour. I believe i am not updating the location of the pixel or something to that effect.
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Nov 30, 2011
I've got a combobox which loads the system colour list, the selected colour is stored in the registry (i've tried storing the index number value aswell as the colour name - how can i get the combobox to display the stored colour as the default colour when the form loads? It always defaults to the first item in the colour list I've tried
[Code]....
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Apr 8, 2009
So I have got a program with a timer on, a few labels displaying coordinates, and two buttons. Here is my
[code]...
It displays the color of the pixel at the coordinate typed into the text boxes.I have a video of a tennis ball which is bouncing on the spot, and the background in brown, so when the tennis ball comes into view there is a significant color change and i want it to start and stop a timer each time the colour changes significantly.So my question is, how do i get it to check whether the colour chas changed significantly?
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Sep 8, 2009
I'm working on a function to return a exponential average and there are a lot of examples of exponential moving averages but they all start with a moving average that is just the mean as a lead in to calculating the continuing moving average. I needed just a exponential average of a value set. After Googling my Bing off I still haven't seen anything so here is my attempt at a basic exponential average. Is this correct? Are there any errors? I have seen some text about adding a smoothing value to change the curve of the exponential average but not how that would be implemented.
[Code]...
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Apr 8, 2010
My VB2010 programme changes the background colour of a button (butExtra.BackColor = Color.Red). But how do I restore the colour to the default "Control" colour?
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May 30, 2011
i am looking to change the windows colour and colour intensity. These settings are accessable through Control PanelAppearance and PersonalizationPersonalizationWindow Color and Appearance But is there a way that i can remotely change these two settings through functions in my windows form application? Also is there any way of removing the slight blur on the window bars/taskbar when using an aero theme?
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Mar 26, 2012
I put comments on the average output since I kept getting error messages about that. My out keeps saying:
Maximum value: 33
Minimum value: 33
what am I doing wrong?
Option Explicit On
Option Strict On
[Code]...
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