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csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js

Summary

Maintainability
D
1 day
Test Coverage

Function isHaarFeature has 74 lines of code (exceeds 25 allowed). Consider refactoring.
Open

function isHaarFeature(event) {
  var target = event.target

  // A----AB-----B
  // |           |
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js - About 2 hrs to fix

Function loadImageDialog has 35 lines of code (exceeds 25 allowed). Consider refactoring.
Open

function loadImageDialog() {
  var input = this;
  if (input.files && input.files[0]) {
    var reader = new FileReader();
    reader.onload = function(e) {
Severity: Minor
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js - About 1 hr to fix

Function updateDisplay has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.
Open

function updateDisplay(whiteSquareIntensity, blackSquareIntensity, target) {
  if (blackSquareIntensity < whiteSquareIntensity) {
    if (!target.classList.contains('valid')) {
      target.classList.add('valid');
      haarFound = haarFound + 1;
Severity: Minor
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js - About 45 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

    var pointF = { x: pointB.x - (pointB.x - pointA.x) / 4, y: pointA.y + (pointD.y - pointA.y) / 4 }
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 1 other location - About 1 hr to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 181..181

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 66.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

    var pointG = { x: pointB.x - (pointB.x - pointA.x) / 4, y: pointD.y - (pointD.y - pointA.y) / 4 }
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 1 other location - About 1 hr to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 180..180

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 66.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

  var pointDC = { x: pointD.x + ((pointC.x - pointD.x) / 2), y: pointD.y };
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 3 other locations - About 35 mins to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 84..84
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 131..131
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 132..132

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 46.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

    var pointG = { x: pointC.x - (pointC.x - pointD.x) / 3, y: pointC.y }
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 3 other locations - About 35 mins to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 84..84
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 85..85
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 131..131

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 46.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

    var pointF = { x: pointA.x, y: pointD.y - (pointD.y - pointA.y) / 3 }
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 3 other locations - About 35 mins to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 86..86
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 87..87
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 157..157

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 46.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

    var pointG = { x: pointB.x, y: pointB.y + (pointC.y - pointB.y) / 3 }
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 3 other locations - About 35 mins to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 86..86
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 87..87
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 156..156

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 46.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

    var pointF = { x: pointB.x - (pointB.x - pointA.x) / 3, y: pointA.y }
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 3 other locations - About 35 mins to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 84..84
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 85..85
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 132..132

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 46.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

  var pointBC = { x: pointB.x, y: pointB.y + ((pointC.y - pointB.y) / 2) };
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 3 other locations - About 35 mins to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 86..86
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 156..156
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 157..157

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 46.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

  var pointAD = { x: pointA.x, y: pointA.y + ((pointD.y - pointA.y) / 2) };
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 3 other locations - About 35 mins to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 87..87
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 156..156
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 157..157

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 46.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

  var pointAB = { x: pointA.x + ((pointB.x - pointA.x) / 2), y: pointA.y };
Severity: Major
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 3 other locations - About 35 mins to fix
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 85..85
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 131..131
csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js on lines 132..132

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 46.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

    var brightness = 0.34 * data[i] + 0.5 * data[i + 1] + 0.16 * data[i + 2];
Severity: Minor
Found in csfieldguide/static/interactives/viola-jones-face-detector/js/viola-jones.js and 1 other location - About 35 mins to fix
csfieldguide/static/interactives/jpeg-compression/js/jpeg-compression.js on lines 616..616

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 46.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

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